* [PATCHES] semaphore rewrite
@ 2008-02-27 0:36 Matthew Wilcox
2008-02-28 6:33 ` [PATCH 01/12] Fix quota.h includes Matthew Wilcox
0 siblings, 1 reply; 30+ messages in thread
From: Matthew Wilcox @ 2008-02-27 0:36 UTC (permalink / raw)
To: linux-kernel
Here's a series of twelve patches to introduce down_killable(). I expect
the first ten to be uncontroversial, and easy to apply. The last two
... I'm still testing. More testers would be welcome, particularly
people who have performance test-suites they wouldn't want to see regress.
The way I go about introducing down_killable is to replace all the
carefully hand-tuned assembler with a generic C implementation. One of
the annoying things about this is that the header file is in
asm/semaphore.h instead of linux/semaphore.h. I tackle this by removing
all the obsolete inclusions of asm/semaphore.h (around 100 of them).
In order for that to work, I actually need to add a couple in places
where they were being implicitly included.
Then I replace the per-arch implementations with a generic one. All the
<asm/semaphore.h> files become a one-line include of linux/sempahore.h.
Then all remaining users in the tree are converted to use
linux/semaphore.h.
I add 'removal of asm/semaphore.h' to features-removal to not inflict
extra pain on Andrew during this process.
So, to recap:
Patches 1 - 2: Add missing includes
Patches 3 - 10: Remove obsolete includes (split up by top-level directory)
Patch 11: Generic semaphore implementation
Patch 12: Switch remaining users to linux/semaphore.h
I hope this split causes the least amount of pain.
--
Intel are signing my paycheques ... these opinions are still mine
"Bill, look, we understand that you're interested in selling us this
operating system, but compare it to ours. We can't possibly take such
a retrograde step."
^ permalink raw reply [flat|nested] 30+ messages in thread
* [PATCH 01/12] Fix quota.h includes
2008-02-27 0:36 [PATCHES] semaphore rewrite Matthew Wilcox
@ 2008-02-28 6:33 ` Matthew Wilcox
2008-02-28 6:33 ` [PATCH 02/12] Add semaphore.h to kernel_lock.c Matthew Wilcox
0 siblings, 1 reply; 30+ messages in thread
From: Matthew Wilcox @ 2008-02-28 6:33 UTC (permalink / raw)
To: linux-kernel; +Cc: Matthew Wilcox, Matthew Wilcox
quota.h currently relies on asm/semaphore.h (through some chain; it
doesn't actually include semaphore.h itself) to include wait.h. As
well as being bad practice to rely on an implicit include, subsequent
patches will break this. While I'm in this file, add atomic.h and
list.h, and sort the list of includes.
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
---
include/linux/quota.h | 8 ++++++--
1 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/include/linux/quota.h b/include/linux/quota.h
index 6e0393a..eb560d0 100644
--- a/include/linux/quota.h
+++ b/include/linux/quota.h
@@ -160,14 +160,18 @@ enum {
#ifdef __KERNEL__
-#include <linux/spinlock.h>
-#include <linux/rwsem.h>
+#include <linux/list.h>
#include <linux/mutex.h>
+#include <linux/rwsem.h>
+#include <linux/spinlock.h>
+#include <linux/wait.h>
#include <linux/dqblk_xfs.h>
#include <linux/dqblk_v1.h>
#include <linux/dqblk_v2.h>
+#include <asm/atomic.h>
+
extern spinlock_t dq_data_lock;
/* Maximal numbers of writes for quota operation (insert/delete/update)
--
1.5.4.1
^ permalink raw reply related [flat|nested] 30+ messages in thread
* [PATCH 02/12] Add semaphore.h to kernel_lock.c
2008-02-28 6:33 ` [PATCH 01/12] Fix quota.h includes Matthew Wilcox
@ 2008-02-28 6:33 ` Matthew Wilcox
2008-02-28 6:33 ` [PATCH 03/12] arch: Remove unnecessary inclusions of asm/semaphore.h Matthew Wilcox
0 siblings, 1 reply; 30+ messages in thread
From: Matthew Wilcox @ 2008-02-28 6:33 UTC (permalink / raw)
To: linux-kernel; +Cc: Matthew Wilcox, Matthew Wilcox
kernel_lock.c uses DECLARE_MUTEX, up() and down() without explicitly
including asm/semaphore.h. This is fragile and leaves it vulnerable
to breakage during header reorganisations.
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
---
lib/kernel_lock.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/lib/kernel_lock.c b/lib/kernel_lock.c
index 812dbf0..fbc11a3 100644
--- a/lib/kernel_lock.c
+++ b/lib/kernel_lock.c
@@ -8,6 +8,7 @@
#include <linux/smp_lock.h>
#include <linux/module.h>
#include <linux/kallsyms.h>
+#include <asm/semaphore.h>
/*
* The 'big kernel semaphore'
--
1.5.4.1
^ permalink raw reply related [flat|nested] 30+ messages in thread
* [PATCH 03/12] arch: Remove unnecessary inclusions of asm/semaphore.h
2008-02-28 6:33 ` [PATCH 02/12] Add semaphore.h to kernel_lock.c Matthew Wilcox
@ 2008-02-28 6:33 ` Matthew Wilcox
2008-02-28 6:33 ` [PATCH 04/12] net: " Matthew Wilcox
0 siblings, 1 reply; 30+ messages in thread
From: Matthew Wilcox @ 2008-02-28 6:33 UTC (permalink / raw)
To: linux-kernel; +Cc: Matthew Wilcox, Matthew Wilcox
None of these files use any of the functionality promised by
asm/semaphore.h. It's possible that they rely on it dragging in some
unrelated header file, but I can't build all these files, so we'll have
fix any build failures as they come up.
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
---
arch/arm/common/rtctime.c | 1 -
arch/arm/mach-aaec2000/clock.c | 2 --
arch/arm/mach-at91/clock.c | 1 -
arch/arm/mach-integrator/clock.c | 1 -
arch/arm/mach-pnx4008/clock.c | 1 -
arch/arm/mach-pnx4008/gpio.c | 1 -
arch/arm/mach-realview/clock.c | 1 -
arch/arm/mach-versatile/clock.c | 1 -
arch/arm/plat-omap/clock.c | 1 -
arch/ia64/sn/kernel/sn2/sn_hwperf.c | 1 -
arch/m68k/atari/stram.c | 1 -
arch/m68k/sun3/intersil.c | 1 -
arch/mips/sgi-ip27/ip27-console.c | 1 -
arch/parisc/kernel/sys_parisc32.c | 1 -
arch/powerpc/kernel/rtas.c | 1 -
arch/powerpc/kernel/sys_ppc32.c | 1 -
arch/powerpc/kernel/syscalls.c | 1 -
arch/powerpc/platforms/cell/spufs/file.c | 1 -
arch/powerpc/platforms/cell/spufs/inode.c | 1 -
arch/powerpc/platforms/powermac/pfunc_core.c | 1 -
arch/ppc/syslib/ocp.c | 1 -
arch/s390/kernel/compat_linux.c | 1 -
arch/s390/kernel/debug.c | 1 -
arch/sparc64/kernel/sys_sparc32.c | 1 -
arch/v850/kernel/syscalls.c | 1 -
arch/x86/ia32/sys_ia32.c | 1 -
arch/x86/kernel/cpu/common.c | 1 -
arch/x86/kernel/cpu/proc.c | 1 -
28 files changed, 0 insertions(+), 29 deletions(-)
diff --git a/arch/arm/common/rtctime.c b/arch/arm/common/rtctime.c
index f53bca4..aa8f773 100644
--- a/arch/arm/common/rtctime.c
+++ b/arch/arm/common/rtctime.c
@@ -22,7 +22,6 @@
#include <linux/mutex.h>
#include <asm/rtc.h>
-#include <asm/semaphore.h>
static DECLARE_WAIT_QUEUE_HEAD(rtc_wait);
static struct fasync_struct *rtc_async_queue;
diff --git a/arch/arm/mach-aaec2000/clock.c b/arch/arm/mach-aaec2000/clock.c
index 74aa7a3..e10ee15 100644
--- a/arch/arm/mach-aaec2000/clock.c
+++ b/arch/arm/mach-aaec2000/clock.c
@@ -18,8 +18,6 @@
#include <linux/clk.h>
#include <linux/mutex.h>
-#include <asm/semaphore.h>
-
#include "clock.h"
static LIST_HEAD(clocks);
diff --git a/arch/arm/mach-at91/clock.c b/arch/arm/mach-at91/clock.c
index de6424e..a33dfe4 100644
--- a/arch/arm/mach-at91/clock.c
+++ b/arch/arm/mach-at91/clock.c
@@ -23,7 +23,6 @@
#include <linux/delay.h>
#include <linux/clk.h>
-#include <asm/semaphore.h>
#include <asm/io.h>
#include <asm/mach-types.h>
diff --git a/arch/arm/mach-integrator/clock.c b/arch/arm/mach-integrator/clock.c
index 95a1e26..8d761fd 100644
--- a/arch/arm/mach-integrator/clock.c
+++ b/arch/arm/mach-integrator/clock.c
@@ -17,7 +17,6 @@
#include <linux/clk.h>
#include <linux/mutex.h>
-#include <asm/semaphore.h>
#include <asm/hardware/icst525.h>
#include "clock.h"
diff --git a/arch/arm/mach-pnx4008/clock.c b/arch/arm/mach-pnx4008/clock.c
index daa8d3d..6cfffd2 100644
--- a/arch/arm/mach-pnx4008/clock.c
+++ b/arch/arm/mach-pnx4008/clock.c
@@ -21,7 +21,6 @@
#include <linux/err.h>
#include <linux/delay.h>
-#include <asm/semaphore.h>
#include <asm/hardware.h>
#include <asm/io.h>
diff --git a/arch/arm/mach-pnx4008/gpio.c b/arch/arm/mach-pnx4008/gpio.c
index 1ab84ce..ef179ca 100644
--- a/arch/arm/mach-pnx4008/gpio.c
+++ b/arch/arm/mach-pnx4008/gpio.c
@@ -17,7 +17,6 @@
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/module.h>
-#include <asm/semaphore.h>
#include <asm/io.h>
#include <asm/arch/platform.h>
#include <asm/arch/gpio.h>
diff --git a/arch/arm/mach-realview/clock.c b/arch/arm/mach-realview/clock.c
index 21325a4..3e706c5 100644
--- a/arch/arm/mach-realview/clock.c
+++ b/arch/arm/mach-realview/clock.c
@@ -16,7 +16,6 @@
#include <linux/clk.h>
#include <linux/mutex.h>
-#include <asm/semaphore.h>
#include <asm/hardware/icst307.h>
#include "clock.h"
diff --git a/arch/arm/mach-versatile/clock.c b/arch/arm/mach-versatile/clock.c
index 9858c96..9336508 100644
--- a/arch/arm/mach-versatile/clock.c
+++ b/arch/arm/mach-versatile/clock.c
@@ -17,7 +17,6 @@
#include <linux/clk.h>
#include <linux/mutex.h>
-#include <asm/semaphore.h>
#include <asm/hardware/icst307.h>
#include "clock.h"
diff --git a/arch/arm/plat-omap/clock.c b/arch/arm/plat-omap/clock.c
index 0a60324..203ac50 100644
--- a/arch/arm/plat-omap/clock.c
+++ b/arch/arm/plat-omap/clock.c
@@ -23,7 +23,6 @@
#include <linux/platform_device.h>
#include <asm/io.h>
-#include <asm/semaphore.h>
#include <asm/arch/clock.h>
diff --git a/arch/ia64/sn/kernel/sn2/sn_hwperf.c b/arch/ia64/sn/kernel/sn2/sn_hwperf.c
index 4b0d153..8cc0c47 100644
--- a/arch/ia64/sn/kernel/sn2/sn_hwperf.c
+++ b/arch/ia64/sn/kernel/sn2/sn_hwperf.c
@@ -37,7 +37,6 @@
#include <asm/processor.h>
#include <asm/topology.h>
-#include <asm/semaphore.h>
#include <asm/uaccess.h>
#include <asm/sal.h>
#include <asm/sn/io.h>
diff --git a/arch/m68k/atari/stram.c b/arch/m68k/atari/stram.c
index 0055a6c..04c69ff 100644
--- a/arch/m68k/atari/stram.c
+++ b/arch/m68k/atari/stram.c
@@ -29,7 +29,6 @@
#include <asm/atarihw.h>
#include <asm/atari_stram.h>
#include <asm/io.h>
-#include <asm/semaphore.h>
#undef DEBUG
diff --git a/arch/m68k/sun3/intersil.c b/arch/m68k/sun3/intersil.c
index db359d7..0116d20 100644
--- a/arch/m68k/sun3/intersil.c
+++ b/arch/m68k/sun3/intersil.c
@@ -15,7 +15,6 @@
#include <asm/errno.h>
#include <asm/system.h>
-#include <asm/semaphore.h>
#include <asm/rtc.h>
#include <asm/intersil.h>
diff --git a/arch/mips/sgi-ip27/ip27-console.c b/arch/mips/sgi-ip27/ip27-console.c
index 3ba8306..984e561 100644
--- a/arch/mips/sgi-ip27/ip27-console.c
+++ b/arch/mips/sgi-ip27/ip27-console.c
@@ -8,7 +8,6 @@
#include <linux/init.h>
#include <asm/page.h>
-#include <asm/semaphore.h>
#include <asm/sn/addrs.h>
#include <asm/sn/sn0/hub.h>
#include <asm/sn/klconfig.h>
diff --git a/arch/parisc/kernel/sys_parisc32.c b/arch/parisc/kernel/sys_parisc32.c
index 50bbf33..71efd6a 100644
--- a/arch/parisc/kernel/sys_parisc32.c
+++ b/arch/parisc/kernel/sys_parisc32.c
@@ -49,7 +49,6 @@
#include <asm/types.h>
#include <asm/uaccess.h>
-#include <asm/semaphore.h>
#include <asm/mmu_context.h>
#include "sys32.h"
diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c
index 52e95c2..fe8d951 100644
--- a/arch/powerpc/kernel/rtas.c
+++ b/arch/powerpc/kernel/rtas.c
@@ -26,7 +26,6 @@
#include <asm/prom.h>
#include <asm/rtas.h>
#include <asm/hvcall.h>
-#include <asm/semaphore.h>
#include <asm/machdep.h>
#include <asm/firmware.h>
#include <asm/page.h>
diff --git a/arch/powerpc/kernel/sys_ppc32.c b/arch/powerpc/kernel/sys_ppc32.c
index 4a4f5c6..fee9ee2 100644
--- a/arch/powerpc/kernel/sys_ppc32.c
+++ b/arch/powerpc/kernel/sys_ppc32.c
@@ -47,7 +47,6 @@
#include <asm/types.h>
#include <asm/uaccess.h>
#include <asm/unistd.h>
-#include <asm/semaphore.h>
#include <asm/time.h>
#include <asm/mmu_context.h>
#include <asm/ppc-pci.h>
diff --git a/arch/powerpc/kernel/syscalls.c b/arch/powerpc/kernel/syscalls.c
index 3b1d5dd..e722a4e 100644
--- a/arch/powerpc/kernel/syscalls.c
+++ b/arch/powerpc/kernel/syscalls.c
@@ -38,7 +38,6 @@
#include <linux/personality.h>
#include <asm/uaccess.h>
-#include <asm/semaphore.h>
#include <asm/syscalls.h>
#include <asm/time.h>
#include <asm/unistd.h>
diff --git a/arch/powerpc/platforms/cell/spufs/file.c b/arch/powerpc/platforms/cell/spufs/file.c
index c66c375..bcb8af8 100644
--- a/arch/powerpc/platforms/cell/spufs/file.c
+++ b/arch/powerpc/platforms/cell/spufs/file.c
@@ -32,7 +32,6 @@
#include <linux/marker.h>
#include <asm/io.h>
-#include <asm/semaphore.h>
#include <asm/spu.h>
#include <asm/spu_info.h>
#include <asm/uaccess.h>
diff --git a/arch/powerpc/platforms/cell/spufs/inode.c b/arch/powerpc/platforms/cell/spufs/inode.c
index 6d1228c..0c32a05 100644
--- a/arch/powerpc/platforms/cell/spufs/inode.c
+++ b/arch/powerpc/platforms/cell/spufs/inode.c
@@ -35,7 +35,6 @@
#include <linux/parser.h>
#include <asm/prom.h>
-#include <asm/semaphore.h>
#include <asm/spu.h>
#include <asm/spu_priv1.h>
#include <asm/uaccess.h>
diff --git a/arch/powerpc/platforms/powermac/pfunc_core.c b/arch/powerpc/platforms/powermac/pfunc_core.c
index 8543423..96d5ce5 100644
--- a/arch/powerpc/platforms/powermac/pfunc_core.c
+++ b/arch/powerpc/platforms/powermac/pfunc_core.c
@@ -12,7 +12,6 @@
#include <linux/module.h>
#include <linux/mutex.h>
-#include <asm/semaphore.h>
#include <asm/prom.h>
#include <asm/pmac_pfunc.h>
diff --git a/arch/ppc/syslib/ocp.c b/arch/ppc/syslib/ocp.c
index ac80370..a6fb7dc 100644
--- a/arch/ppc/syslib/ocp.c
+++ b/arch/ppc/syslib/ocp.c
@@ -49,7 +49,6 @@
#include <asm/io.h>
#include <asm/ocp.h>
#include <asm/errno.h>
-#include <asm/semaphore.h>
//#define DBG(x) printk x
#define DBG(x)
diff --git a/arch/s390/kernel/compat_linux.c b/arch/s390/kernel/compat_linux.c
index 50b85d0..d7f2222 100644
--- a/arch/s390/kernel/compat_linux.c
+++ b/arch/s390/kernel/compat_linux.c
@@ -62,7 +62,6 @@
#include <asm/types.h>
#include <asm/uaccess.h>
-#include <asm/semaphore.h>
#include <net/scm.h>
#include <net/sock.h>
diff --git a/arch/s390/kernel/debug.c b/arch/s390/kernel/debug.c
index 1b2f5ce..79653a7 100644
--- a/arch/s390/kernel/debug.c
+++ b/arch/s390/kernel/debug.c
@@ -17,7 +17,6 @@
#include <linux/ctype.h>
#include <linux/sysctl.h>
#include <asm/uaccess.h>
-#include <asm/semaphore.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/fs.h>
diff --git a/arch/sparc64/kernel/sys_sparc32.c b/arch/sparc64/kernel/sys_sparc32.c
index deaba2b..de3be1e 100644
--- a/arch/sparc64/kernel/sys_sparc32.c
+++ b/arch/sparc64/kernel/sys_sparc32.c
@@ -55,7 +55,6 @@
#include <asm/types.h>
#include <asm/uaccess.h>
#include <asm/fpumacro.h>
-#include <asm/semaphore.h>
#include <asm/mmu_context.h>
#include <asm/compat_signal.h>
diff --git a/arch/v850/kernel/syscalls.c b/arch/v850/kernel/syscalls.c
index 0a4df4d..003db9c 100644
--- a/arch/v850/kernel/syscalls.c
+++ b/arch/v850/kernel/syscalls.c
@@ -30,7 +30,6 @@
#include <linux/file.h>
#include <asm/uaccess.h>
-#include <asm/semaphore.h>
#include <asm/unistd.h>
/*
diff --git a/arch/x86/ia32/sys_ia32.c b/arch/x86/ia32/sys_ia32.c
index abf71d2..211eed3 100644
--- a/arch/x86/ia32/sys_ia32.c
+++ b/arch/x86/ia32/sys_ia32.c
@@ -64,7 +64,6 @@
#include <asm/mman.h>
#include <asm/types.h>
#include <asm/uaccess.h>
-#include <asm/semaphore.h>
#include <asm/atomic.h>
#include <asm/ldt.h>
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index a38aafa..2ffab32 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -5,7 +5,6 @@
#include <linux/module.h>
#include <linux/percpu.h>
#include <linux/bootmem.h>
-#include <asm/semaphore.h>
#include <asm/processor.h>
#include <asm/i387.h>
#include <asm/msr.h>
diff --git a/arch/x86/kernel/cpu/proc.c b/arch/x86/kernel/cpu/proc.c
index af11d31..149dbce 100644
--- a/arch/x86/kernel/cpu/proc.c
+++ b/arch/x86/kernel/cpu/proc.c
@@ -1,7 +1,6 @@
#include <linux/smp.h>
#include <linux/timex.h>
#include <linux/string.h>
-#include <asm/semaphore.h>
#include <linux/seq_file.h>
#include <linux/cpufreq.h>
--
1.5.4.1
^ permalink raw reply related [flat|nested] 30+ messages in thread
* [PATCH 04/12] net: Remove unnecessary inclusions of asm/semaphore.h
2008-02-28 6:33 ` [PATCH 03/12] arch: Remove unnecessary inclusions of asm/semaphore.h Matthew Wilcox
@ 2008-02-28 6:33 ` Matthew Wilcox
2008-02-28 6:33 ` [PATCH 05/12] drivers: " Matthew Wilcox
0 siblings, 1 reply; 30+ messages in thread
From: Matthew Wilcox @ 2008-02-28 6:33 UTC (permalink / raw)
To: linux-kernel; +Cc: Matthew Wilcox, Matthew Wilcox
None of these files use any of the functionality promised by
asm/semaphore.h. It's possible that they rely on it dragging in some
unrelated header file, but I can't build all these files, so we'll have
fix any build failures as they come up.
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
---
drivers/net/cxgb3/adapter.h | 1 -
drivers/net/cxgb3/t3cdev.h | 1 -
drivers/net/ibmveth.c | 1 -
drivers/net/netxen/netxen_nic_hdr.h | 1 -
drivers/net/usb/kaweth.c | 1 -
drivers/net/wireless/bcm43xx/bcm43xx_debugfs.h | 1 -
net/core/flow.c | 1 -
net/dccp/proto.c | 1 -
net/ipv4/ipcomp.c | 1 -
net/ipv6/ipcomp6.c | 1 -
10 files changed, 0 insertions(+), 10 deletions(-)
diff --git a/drivers/net/cxgb3/adapter.h b/drivers/net/cxgb3/adapter.h
index eb305a0..4fdb13f 100644
--- a/drivers/net/cxgb3/adapter.h
+++ b/drivers/net/cxgb3/adapter.h
@@ -43,7 +43,6 @@
#include <linux/mutex.h>
#include <linux/bitops.h>
#include "t3cdev.h"
-#include <asm/semaphore.h>
#include <asm/io.h>
struct vlan_group;
diff --git a/drivers/net/cxgb3/t3cdev.h b/drivers/net/cxgb3/t3cdev.h
index 77fcc1a..a18c8a1 100644
--- a/drivers/net/cxgb3/t3cdev.h
+++ b/drivers/net/cxgb3/t3cdev.h
@@ -34,7 +34,6 @@
#include <linux/list.h>
#include <asm/atomic.h>
-#include <asm/semaphore.h>
#include <linux/netdevice.h>
#include <linux/proc_fs.h>
#include <linux/skbuff.h>
diff --git a/drivers/net/ibmveth.c b/drivers/net/ibmveth.c
index 57772be..e2d7b66 100644
--- a/drivers/net/ibmveth.c
+++ b/drivers/net/ibmveth.c
@@ -49,7 +49,6 @@
#include <linux/in.h>
#include <linux/ip.h>
#include <net/net_namespace.h>
-#include <asm/semaphore.h>
#include <asm/hvcall.h>
#include <asm/atomic.h>
#include <asm/vio.h>
diff --git a/drivers/net/netxen/netxen_nic_hdr.h b/drivers/net/netxen/netxen_nic_hdr.h
index d72f8f8..5bc3cbf 100644
--- a/drivers/net/netxen/netxen_nic_hdr.h
+++ b/drivers/net/netxen/netxen_nic_hdr.h
@@ -34,7 +34,6 @@
#include <linux/kernel.h>
#include <linux/version.h>
-#include <asm/semaphore.h>
#include <linux/spinlock.h>
#include <asm/irq.h>
#include <linux/init.h>
diff --git a/drivers/net/usb/kaweth.c b/drivers/net/usb/kaweth.c
index 569ad8b..0dcfc03 100644
--- a/drivers/net/usb/kaweth.c
+++ b/drivers/net/usb/kaweth.c
@@ -58,7 +58,6 @@
#include <linux/dma-mapping.h>
#include <linux/wait.h>
#include <asm/uaccess.h>
-#include <asm/semaphore.h>
#include <asm/byteorder.h>
#undef DEBUG
diff --git a/drivers/net/wireless/bcm43xx/bcm43xx_debugfs.h b/drivers/net/wireless/bcm43xx/bcm43xx_debugfs.h
index a40d1af..b46f43d 100644
--- a/drivers/net/wireless/bcm43xx/bcm43xx_debugfs.h
+++ b/drivers/net/wireless/bcm43xx/bcm43xx_debugfs.h
@@ -7,7 +7,6 @@ struct bcm43xx_xmitstatus;
#ifdef CONFIG_BCM43XX_DEBUG
#include <linux/list.h>
-#include <asm/semaphore.h>
struct dentry;
diff --git a/net/core/flow.c b/net/core/flow.c
index a77531c..1999117 100644
--- a/net/core/flow.c
+++ b/net/core/flow.c
@@ -23,7 +23,6 @@
#include <linux/mutex.h>
#include <net/flow.h>
#include <asm/atomic.h>
-#include <asm/semaphore.h>
#include <linux/security.h>
struct flow_cache_entry {
diff --git a/net/dccp/proto.c b/net/dccp/proto.c
index e3f5d37..c12af3d 100644
--- a/net/dccp/proto.c
+++ b/net/dccp/proto.c
@@ -27,7 +27,6 @@
#include <net/xfrm.h>
#include <asm/ioctls.h>
-#include <asm/semaphore.h>
#include <linux/spinlock.h>
#include <linux/timer.h>
#include <linux/delay.h>
diff --git a/net/ipv4/ipcomp.c b/net/ipv4/ipcomp.c
index ae1f45f..fc9de7c 100644
--- a/net/ipv4/ipcomp.c
+++ b/net/ipv4/ipcomp.c
@@ -14,7 +14,6 @@
* - Adaptive compression.
*/
#include <linux/module.h>
-#include <asm/semaphore.h>
#include <linux/crypto.h>
#include <linux/err.h>
#include <linux/pfkeyv2.h>
diff --git a/net/ipv6/ipcomp6.c b/net/ipv6/ipcomp6.c
index b900395..eebc218 100644
--- a/net/ipv6/ipcomp6.c
+++ b/net/ipv6/ipcomp6.c
@@ -34,7 +34,6 @@
#include <net/ip.h>
#include <net/xfrm.h>
#include <net/ipcomp.h>
-#include <asm/semaphore.h>
#include <linux/crypto.h>
#include <linux/err.h>
#include <linux/pfkeyv2.h>
--
1.5.4.1
^ permalink raw reply related [flat|nested] 30+ messages in thread
* [PATCH 05/12] drivers: Remove unnecessary inclusions of asm/semaphore.h
2008-02-28 6:33 ` [PATCH 04/12] net: " Matthew Wilcox
@ 2008-02-28 6:33 ` Matthew Wilcox
2008-02-28 6:33 ` [PATCH 06/12] fs: " Matthew Wilcox
0 siblings, 1 reply; 30+ messages in thread
From: Matthew Wilcox @ 2008-02-28 6:33 UTC (permalink / raw)
To: linux-kernel; +Cc: Matthew Wilcox, Matthew Wilcox
None of these files use any of the functionality promised by
asm/semaphore.h. It's possible that they rely on it dragging in some
unrelated header file, but I can't build all these files, so we'll have
fix any build failures as they come up.
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
---
drivers/ata/libata-core.c | 1 -
drivers/block/cryptoloop.c | 1 -
drivers/char/generic_serial.c | 1 -
drivers/char/rio/rioboot.c | 1 -
drivers/char/rio/riocmd.c | 1 -
drivers/char/rio/rioctrl.c | 1 -
drivers/char/rio/rioinit.c | 1 -
drivers/char/rio/riointr.c | 1 -
drivers/char/rio/rioparam.c | 1 -
drivers/char/rio/rioroute.c | 1 -
drivers/char/rio/riotable.c | 1 -
drivers/char/rio/riotty.c | 1 -
drivers/firewire/fw-transaction.c | 1 -
drivers/firmware/dcdbas.c | 1 -
drivers/infiniband/hw/amso1100/c2.h | 1 -
drivers/infiniband/hw/nes/nes.h | 1 -
drivers/lguest/lg.h | 1 -
drivers/media/radio/radio-aimslab.c | 1 -
drivers/media/video/ir-kbd-i2c.c | 1 -
drivers/media/video/ov511.c | 1 -
drivers/media/video/pvrusb2/pvrusb2-context.c | 1 -
drivers/media/video/pvrusb2/pvrusb2-hdw.c | 1 -
drivers/media/video/pvrusb2/pvrusb2-sysfs.c | 1 -
drivers/mfd/ucb1x00-ts.c | 1 -
drivers/s390/cio/ccwgroup.c | 1 -
drivers/s390/net/qeth_main.c | 1 -
drivers/scsi/aacraid/aachba.c | 1 -
drivers/scsi/aacraid/comminit.c | 1 -
drivers/scsi/aacraid/linit.c | 1 -
drivers/scsi/aacraid/rx.c | 1 -
drivers/scsi/aacraid/sa.c | 1 -
drivers/scsi/dpt/dpti_i2o.h | 1 -
drivers/scsi/megaraid/mega_common.h | 1 -
drivers/serial/mcfserial.c | 1 -
drivers/usb/atm/usbatm.h | 1 -
drivers/usb/core/hub.c | 1 -
drivers/usb/misc/appledisplay.c | 1 -
drivers/usb/serial/io_ti.c | 1 -
drivers/usb/serial/ti_usb_3410_5052.c | 1 -
39 files changed, 0 insertions(+), 39 deletions(-)
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 4fbcce7..b665674 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -62,7 +62,6 @@
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_host.h>
#include <linux/libata.h>
-#include <asm/semaphore.h>
#include <asm/byteorder.h>
#include <linux/cdrom.h>
diff --git a/drivers/block/cryptoloop.c b/drivers/block/cryptoloop.c
index 2411678..8b6bb76 100644
--- a/drivers/block/cryptoloop.c
+++ b/drivers/block/cryptoloop.c
@@ -27,7 +27,6 @@
#include <linux/blkdev.h>
#include <linux/loop.h>
#include <linux/scatterlist.h>
-#include <asm/semaphore.h>
#include <asm/uaccess.h>
MODULE_LICENSE("GPL");
diff --git a/drivers/char/generic_serial.c b/drivers/char/generic_serial.c
index 8facf3e..7ed7da1 100644
--- a/drivers/char/generic_serial.c
+++ b/drivers/char/generic_serial.c
@@ -28,7 +28,6 @@
#include <linux/interrupt.h>
#include <linux/tty_flip.h>
#include <linux/delay.h>
-#include <asm/semaphore.h>
#include <asm/uaccess.h>
#define DEBUG
diff --git a/drivers/char/rio/rioboot.c b/drivers/char/rio/rioboot.c
index eca2b95..d956dd3 100644
--- a/drivers/char/rio/rioboot.c
+++ b/drivers/char/rio/rioboot.c
@@ -35,7 +35,6 @@
#include <linux/termios.h>
#include <linux/serial.h>
#include <linux/vmalloc.h>
-#include <asm/semaphore.h>
#include <linux/generic_serial.h>
#include <linux/errno.h>
#include <linux/interrupt.h>
diff --git a/drivers/char/rio/riocmd.c b/drivers/char/rio/riocmd.c
index 7321d00..bf36959 100644
--- a/drivers/char/rio/riocmd.c
+++ b/drivers/char/rio/riocmd.c
@@ -41,7 +41,6 @@ static char *_riocmd_c_sccs_ = "@(#)riocmd.c 1.2";
#include <asm/io.h>
#include <asm/system.h>
#include <asm/string.h>
-#include <asm/semaphore.h>
#include <asm/uaccess.h>
#include <linux/termios.h>
diff --git a/drivers/char/rio/rioctrl.c b/drivers/char/rio/rioctrl.c
index 7ce7761..d8eb2bc 100644
--- a/drivers/char/rio/rioctrl.c
+++ b/drivers/char/rio/rioctrl.c
@@ -40,7 +40,6 @@ static char *_rioctrl_c_sccs_ = "@(#)rioctrl.c 1.3";
#include <asm/io.h>
#include <asm/system.h>
#include <asm/string.h>
-#include <asm/semaphore.h>
#include <asm/uaccess.h>
#include <linux/termios.h>
diff --git a/drivers/char/rio/rioinit.c b/drivers/char/rio/rioinit.c
index 0794844..add1718 100644
--- a/drivers/char/rio/rioinit.c
+++ b/drivers/char/rio/rioinit.c
@@ -40,7 +40,6 @@ static char *_rioinit_c_sccs_ = "@(#)rioinit.c 1.3";
#include <asm/io.h>
#include <asm/system.h>
#include <asm/string.h>
-#include <asm/semaphore.h>
#include <asm/uaccess.h>
#include <linux/termios.h>
diff --git a/drivers/char/rio/riointr.c b/drivers/char/rio/riointr.c
index ebc7634..4734e26 100644
--- a/drivers/char/rio/riointr.c
+++ b/drivers/char/rio/riointr.c
@@ -42,7 +42,6 @@ static char *_riointr_c_sccs_ = "@(#)riointr.c 1.2";
#include <asm/io.h>
#include <asm/system.h>
#include <asm/string.h>
-#include <asm/semaphore.h>
#include <asm/uaccess.h>
#include <linux/termios.h>
diff --git a/drivers/char/rio/rioparam.c b/drivers/char/rio/rioparam.c
index bb498d2..da276ed 100644
--- a/drivers/char/rio/rioparam.c
+++ b/drivers/char/rio/rioparam.c
@@ -41,7 +41,6 @@ static char *_rioparam_c_sccs_ = "@(#)rioparam.c 1.3";
#include <asm/io.h>
#include <asm/system.h>
#include <asm/string.h>
-#include <asm/semaphore.h>
#include <asm/uaccess.h>
#include <linux/termios.h>
diff --git a/drivers/char/rio/rioroute.c b/drivers/char/rio/rioroute.c
index a99f3d9..85091ff 100644
--- a/drivers/char/rio/rioroute.c
+++ b/drivers/char/rio/rioroute.c
@@ -39,7 +39,6 @@ static char *_rioroute_c_sccs_ = "@(#)rioroute.c 1.3";
#include <asm/io.h>
#include <asm/system.h>
#include <asm/string.h>
-#include <asm/semaphore.h>
#include <asm/uaccess.h>
#include <linux/termios.h>
diff --git a/drivers/char/rio/riotable.c b/drivers/char/rio/riotable.c
index 991119c..dfce405 100644
--- a/drivers/char/rio/riotable.c
+++ b/drivers/char/rio/riotable.c
@@ -42,7 +42,6 @@ static char *_riotable_c_sccs_ = "@(#)riotable.c 1.2";
#include <asm/io.h>
#include <asm/system.h>
#include <asm/string.h>
-#include <asm/semaphore.h>
#include <asm/uaccess.h>
#include <linux/termios.h>
diff --git a/drivers/char/rio/riotty.c b/drivers/char/rio/riotty.c
index a4f0b1e..5f053e1 100644
--- a/drivers/char/rio/riotty.c
+++ b/drivers/char/rio/riotty.c
@@ -44,7 +44,6 @@ static char *_riotty_c_sccs_ = "@(#)riotty.c 1.3";
#include <asm/io.h>
#include <asm/system.h>
#include <asm/string.h>
-#include <asm/semaphore.h>
#include <asm/uaccess.h>
#include <linux/termios.h>
diff --git a/drivers/firewire/fw-transaction.c b/drivers/firewire/fw-transaction.c
index 7fcc59d..1fe3d45 100644
--- a/drivers/firewire/fw-transaction.c
+++ b/drivers/firewire/fw-transaction.c
@@ -28,7 +28,6 @@
#include <linux/list.h>
#include <linux/kthread.h>
#include <asm/uaccess.h>
-#include <asm/semaphore.h>
#include "fw-transaction.h"
#include "fw-topology.h"
diff --git a/drivers/firmware/dcdbas.c b/drivers/firmware/dcdbas.c
index 1636806..d8822ee 100644
--- a/drivers/firmware/dcdbas.c
+++ b/drivers/firmware/dcdbas.c
@@ -35,7 +35,6 @@
#include <linux/types.h>
#include <linux/mutex.h>
#include <asm/io.h>
-#include <asm/semaphore.h>
#include "dcdbas.h"
diff --git a/drivers/infiniband/hw/amso1100/c2.h b/drivers/infiniband/hw/amso1100/c2.h
index fa58200..dd5c889 100644
--- a/drivers/infiniband/hw/amso1100/c2.h
+++ b/drivers/infiniband/hw/amso1100/c2.h
@@ -40,7 +40,6 @@
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/idr.h>
-#include <asm/semaphore.h>
#include "c2_provider.h"
#include "c2_mq.h"
diff --git a/drivers/infiniband/hw/nes/nes.h b/drivers/infiniband/hw/nes/nes.h
index fd57e8a..0b10474 100644
--- a/drivers/infiniband/hw/nes/nes.h
+++ b/drivers/infiniband/hw/nes/nes.h
@@ -43,7 +43,6 @@
#include <linux/dma-mapping.h>
#include <linux/workqueue.h>
#include <linux/slab.h>
-#include <asm/semaphore.h>
#include <linux/version.h>
#include <asm/io.h>
#include <linux/crc32c.h>
diff --git a/drivers/lguest/lg.h b/drivers/lguest/lg.h
index 2337e1a..005bd04 100644
--- a/drivers/lguest/lg.h
+++ b/drivers/lguest/lg.h
@@ -10,7 +10,6 @@
#include <linux/wait.h>
#include <linux/hrtimer.h>
#include <linux/err.h>
-#include <asm/semaphore.h>
#include <asm/lguest.h>
diff --git a/drivers/media/radio/radio-aimslab.c b/drivers/media/radio/radio-aimslab.c
index f0a67e9..c69bde3 100644
--- a/drivers/media/radio/radio-aimslab.c
+++ b/drivers/media/radio/radio-aimslab.c
@@ -36,7 +36,6 @@
#include <asm/uaccess.h> /* copy to/from user */
#include <linux/videodev2.h> /* kernel radio structs */
#include <media/v4l2-common.h>
-#include <asm/semaphore.h> /* Lock for the I/O */
#include <linux/version.h> /* for KERNEL_VERSION MACRO */
#define RADIO_VERSION KERNEL_VERSION(0,0,2)
diff --git a/drivers/media/video/ir-kbd-i2c.c b/drivers/media/video/ir-kbd-i2c.c
index 9851987..dabafdf 100644
--- a/drivers/media/video/ir-kbd-i2c.c
+++ b/drivers/media/video/ir-kbd-i2c.c
@@ -40,7 +40,6 @@
#include <linux/i2c.h>
#include <linux/i2c-id.h>
#include <linux/workqueue.h>
-#include <asm/semaphore.h>
#include <media/ir-common.h>
#include <media/ir-kbd-i2c.h>
diff --git a/drivers/media/video/ov511.c b/drivers/media/video/ov511.c
index d55d580..6590058 100644
--- a/drivers/media/video/ov511.c
+++ b/drivers/media/video/ov511.c
@@ -41,7 +41,6 @@
#include <linux/slab.h>
#include <linux/ctype.h>
#include <linux/pagemap.h>
-#include <asm/semaphore.h>
#include <asm/processor.h>
#include <linux/mm.h>
#include <linux/device.h>
diff --git a/drivers/media/video/pvrusb2/pvrusb2-context.c b/drivers/media/video/pvrusb2/pvrusb2-context.c
index 9d94aed..160437b 100644
--- a/drivers/media/video/pvrusb2/pvrusb2-context.c
+++ b/drivers/media/video/pvrusb2/pvrusb2-context.c
@@ -26,7 +26,6 @@
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/slab.h>
-#include <asm/semaphore.h>
static void pvr2_context_destroy(struct pvr2_context *mp)
diff --git a/drivers/media/video/pvrusb2/pvrusb2-hdw.c b/drivers/media/video/pvrusb2/pvrusb2-hdw.c
index 41ae980..763b562 100644
--- a/drivers/media/video/pvrusb2/pvrusb2-hdw.c
+++ b/drivers/media/video/pvrusb2/pvrusb2-hdw.c
@@ -25,7 +25,6 @@
#include <linux/firmware.h>
#include <linux/videodev2.h>
#include <media/v4l2-common.h>
-#include <asm/semaphore.h>
#include "pvrusb2.h"
#include "pvrusb2-std.h"
#include "pvrusb2-util.h"
diff --git a/drivers/media/video/pvrusb2/pvrusb2-sysfs.c b/drivers/media/video/pvrusb2/pvrusb2-sysfs.c
index 7a1cd87..07f4eae 100644
--- a/drivers/media/video/pvrusb2/pvrusb2-sysfs.c
+++ b/drivers/media/video/pvrusb2/pvrusb2-sysfs.c
@@ -21,7 +21,6 @@
#include <linux/string.h>
#include <linux/slab.h>
-#include <asm/semaphore.h>
#include "pvrusb2-sysfs.h"
#include "pvrusb2-hdw.h"
#include "pvrusb2-debug.h"
diff --git a/drivers/mfd/ucb1x00-ts.c b/drivers/mfd/ucb1x00-ts.c
index fdbaa77..5e85948 100644
--- a/drivers/mfd/ucb1x00-ts.c
+++ b/drivers/mfd/ucb1x00-ts.c
@@ -32,7 +32,6 @@
#include <linux/kthread.h>
#include <asm/dma.h>
-#include <asm/semaphore.h>
#include <asm/arch/collie.h>
#include <asm/mach-types.h>
diff --git a/drivers/s390/cio/ccwgroup.c b/drivers/s390/cio/ccwgroup.c
index 03914fa..fe1ad17 100644
--- a/drivers/s390/cio/ccwgroup.c
+++ b/drivers/s390/cio/ccwgroup.c
@@ -16,7 +16,6 @@
#include <linux/ctype.h>
#include <linux/dcache.h>
-#include <asm/semaphore.h>
#include <asm/ccwdev.h>
#include <asm/ccwgroup.h>
diff --git a/drivers/s390/net/qeth_main.c b/drivers/s390/net/qeth_main.c
index 62606ce..df81259 100644
--- a/drivers/s390/net/qeth_main.c
+++ b/drivers/s390/net/qeth_main.c
@@ -59,7 +59,6 @@
#include <asm/io.h>
#include <asm/qeth.h>
#include <asm/timex.h>
-#include <asm/semaphore.h>
#include <asm/uaccess.h>
#include <asm/s390_rdev.h>
diff --git a/drivers/scsi/aacraid/aachba.c b/drivers/scsi/aacraid/aachba.c
index c05092f..96903bc 100644
--- a/drivers/scsi/aacraid/aachba.c
+++ b/drivers/scsi/aacraid/aachba.c
@@ -31,7 +31,6 @@
#include <linux/slab.h>
#include <linux/completion.h>
#include <linux/blkdev.h>
-#include <asm/semaphore.h>
#include <asm/uaccess.h>
#include <linux/highmem.h> /* For flush_kernel_dcache_page */
diff --git a/drivers/scsi/aacraid/comminit.c b/drivers/scsi/aacraid/comminit.c
index 89cc8b7..294a802 100644
--- a/drivers/scsi/aacraid/comminit.c
+++ b/drivers/scsi/aacraid/comminit.c
@@ -39,7 +39,6 @@
#include <linux/completion.h>
#include <linux/mm.h>
#include <scsi/scsi_host.h>
-#include <asm/semaphore.h>
#include "aacraid.h"
diff --git a/drivers/scsi/aacraid/linit.c b/drivers/scsi/aacraid/linit.c
index ae5f74f..8372bf6 100644
--- a/drivers/scsi/aacraid/linit.c
+++ b/drivers/scsi/aacraid/linit.c
@@ -42,7 +42,6 @@
#include <linux/syscalls.h>
#include <linux/delay.h>
#include <linux/kthread.h>
-#include <asm/semaphore.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
diff --git a/drivers/scsi/aacraid/rx.c b/drivers/scsi/aacraid/rx.c
index 1f18b83..073208b 100644
--- a/drivers/scsi/aacraid/rx.c
+++ b/drivers/scsi/aacraid/rx.c
@@ -39,7 +39,6 @@
#include <linux/completion.h>
#include <linux/time.h>
#include <linux/interrupt.h>
-#include <asm/semaphore.h>
#include <scsi/scsi_host.h>
diff --git a/drivers/scsi/aacraid/sa.c b/drivers/scsi/aacraid/sa.c
index cfc3410..fc1a557 100644
--- a/drivers/scsi/aacraid/sa.c
+++ b/drivers/scsi/aacraid/sa.c
@@ -39,7 +39,6 @@
#include <linux/completion.h>
#include <linux/time.h>
#include <linux/interrupt.h>
-#include <asm/semaphore.h>
#include <scsi/scsi_host.h>
diff --git a/drivers/scsi/dpt/dpti_i2o.h b/drivers/scsi/dpt/dpti_i2o.h
index 100b49b..19406ce 100644
--- a/drivers/scsi/dpt/dpti_i2o.h
+++ b/drivers/scsi/dpt/dpti_i2o.h
@@ -21,7 +21,6 @@
#include <linux/i2o-dev.h>
-#include <asm/semaphore.h> /* Needed for MUTEX init macros */
#include <linux/version.h>
#include <linux/notifier.h>
#include <asm/atomic.h>
diff --git a/drivers/scsi/megaraid/mega_common.h b/drivers/scsi/megaraid/mega_common.h
index fef9ac9..f62ed46 100644
--- a/drivers/scsi/megaraid/mega_common.h
+++ b/drivers/scsi/megaraid/mega_common.h
@@ -28,7 +28,6 @@
#include <linux/list.h>
#include <linux/moduleparam.h>
#include <linux/dma-mapping.h>
-#include <asm/semaphore.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
diff --git a/drivers/serial/mcfserial.c b/drivers/serial/mcfserial.c
index 99af084..ddd3aa5 100644
--- a/drivers/serial/mcfserial.c
+++ b/drivers/serial/mcfserial.c
@@ -40,7 +40,6 @@
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/system.h>
-#include <asm/semaphore.h>
#include <asm/delay.h>
#include <asm/coldfire.h>
#include <asm/mcfsim.h>
diff --git a/drivers/usb/atm/usbatm.h b/drivers/usb/atm/usbatm.h
index ff8551e..fc6c2be 100644
--- a/drivers/usb/atm/usbatm.h
+++ b/drivers/usb/atm/usbatm.h
@@ -24,7 +24,6 @@
#ifndef _USBATM_H_
#define _USBATM_H_
-#include <asm/semaphore.h>
#include <linux/atm.h>
#include <linux/atmdev.h>
#include <linux/completion.h>
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 68fc521..57aeca1 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -23,7 +23,6 @@
#include <linux/mutex.h>
#include <linux/freezer.h>
-#include <asm/semaphore.h>
#include <asm/uaccess.h>
#include <asm/byteorder.h>
diff --git a/drivers/usb/misc/appledisplay.c b/drivers/usb/misc/appledisplay.c
index 1cb56f2..a5e4c35 100644
--- a/drivers/usb/misc/appledisplay.c
+++ b/drivers/usb/misc/appledisplay.c
@@ -29,7 +29,6 @@
#include <linux/timer.h>
#include <linux/workqueue.h>
#include <asm/atomic.h>
-#include <asm/semaphore.h>
#define APPLE_VENDOR_ID 0x05AC
diff --git a/drivers/usb/serial/io_ti.c b/drivers/usb/serial/io_ti.c
index cd34059..e5ea5ef 100644
--- a/drivers/usb/serial/io_ti.c
+++ b/drivers/usb/serial/io_ti.c
@@ -38,7 +38,6 @@
#include <linux/serial.h>
#include <linux/ioctl.h>
#include <asm/uaccess.h>
-#include <asm/semaphore.h>
#include <linux/usb.h>
#include <linux/usb/serial.h>
diff --git a/drivers/usb/serial/ti_usb_3410_5052.c b/drivers/usb/serial/ti_usb_3410_5052.c
index b517f93..959f768 100644
--- a/drivers/usb/serial/ti_usb_3410_5052.c
+++ b/drivers/usb/serial/ti_usb_3410_5052.c
@@ -82,7 +82,6 @@
#include <linux/circ_buf.h>
#include <linux/mutex.h>
#include <asm/uaccess.h>
-#include <asm/semaphore.h>
#include <linux/usb.h>
#include <linux/usb/serial.h>
--
1.5.4.1
^ permalink raw reply related [flat|nested] 30+ messages in thread
* [PATCH 06/12] fs: Remove unnecessary inclusions of asm/semaphore.h
2008-02-28 6:33 ` [PATCH 05/12] drivers: " Matthew Wilcox
@ 2008-02-28 6:33 ` Matthew Wilcox
2008-02-28 6:33 ` [PATCH 07/12] include: " Matthew Wilcox
0 siblings, 1 reply; 30+ messages in thread
From: Matthew Wilcox @ 2008-02-28 6:33 UTC (permalink / raw)
To: linux-kernel; +Cc: Matthew Wilcox, Matthew Wilcox
None of these files use any of the functionality promised by
asm/semaphore.h.
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
---
fs/9p/fid.c | 1 -
fs/cramfs/inode.c | 1 -
fs/dlm/dlm_internal.h | 1 -
fs/locks.c | 1 -
fs/reiserfs/xattr.c | 1 -
5 files changed, 0 insertions(+), 5 deletions(-)
diff --git a/fs/9p/fid.c b/fs/9p/fid.c
index dfebdbe..3031e32 100644
--- a/fs/9p/fid.c
+++ b/fs/9p/fid.c
@@ -26,7 +26,6 @@
#include <linux/fs.h>
#include <linux/sched.h>
#include <linux/idr.h>
-#include <asm/semaphore.h>
#include <net/9p/9p.h>
#include <net/9p/client.h>
diff --git a/fs/cramfs/inode.c b/fs/cramfs/inode.c
index 350680f..0c3b618 100644
--- a/fs/cramfs/inode.c
+++ b/fs/cramfs/inode.c
@@ -23,7 +23,6 @@
#include <linux/buffer_head.h>
#include <linux/vfs.h>
#include <linux/mutex.h>
-#include <asm/semaphore.h>
#include <asm/uaccess.h>
diff --git a/fs/dlm/dlm_internal.h b/fs/dlm/dlm_internal.h
index d30ea8b..7a8824f 100644
--- a/fs/dlm/dlm_internal.h
+++ b/fs/dlm/dlm_internal.h
@@ -37,7 +37,6 @@
#include <linux/jhash.h>
#include <linux/miscdevice.h>
#include <linux/mutex.h>
-#include <asm/semaphore.h>
#include <asm/uaccess.h>
#include <linux/dlm.h>
diff --git a/fs/locks.c b/fs/locks.c
index f36f0e6..1100df6 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -127,7 +127,6 @@
#include <linux/rcupdate.h>
#include <linux/pid_namespace.h>
-#include <asm/semaphore.h>
#include <asm/uaccess.h>
#define IS_POSIX(fl) (fl->fl_flags & FL_POSIX)
diff --git a/fs/reiserfs/xattr.c b/fs/reiserfs/xattr.c
index eba037b..736bc47 100644
--- a/fs/reiserfs/xattr.c
+++ b/fs/reiserfs/xattr.c
@@ -44,7 +44,6 @@
#include <net/checksum.h>
#include <linux/smp_lock.h>
#include <linux/stat.h>
-#include <asm/semaphore.h>
#define FL_READONLY 128
#define FL_DIR_SEM_HELD 256
--
1.5.4.1
^ permalink raw reply related [flat|nested] 30+ messages in thread
* [PATCH 07/12] include: Remove unnecessary inclusions of asm/semaphore.h
2008-02-28 6:33 ` [PATCH 06/12] fs: " Matthew Wilcox
@ 2008-02-28 6:33 ` Matthew Wilcox
2008-02-28 6:33 ` [PATCH 08/12] kernel: " Matthew Wilcox
0 siblings, 1 reply; 30+ messages in thread
From: Matthew Wilcox @ 2008-02-28 6:33 UTC (permalink / raw)
To: linux-kernel; +Cc: Matthew Wilcox, Matthew Wilcox
None of these files use any of the functionality promised by
asm/semaphore.h. It's possible that they (or some user of them) rely
on it dragging in some unrelated header file, but I can't build all
these files, so we'll have to fix any build failures as they come up.
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
---
include/asm-blackfin/dma.h | 1 -
include/asm-ia64/sn/nodepda.h | 1 -
include/asm-ppc/ocp.h | 1 -
include/linux/cpu.h | 1 -
include/linux/ide.h | 1 -
include/linux/if_pppox.h | 1 -
include/linux/jbd.h | 2 --
include/linux/jbd2.h | 2 --
include/linux/kernelcapi.h | 1 -
include/linux/raid/md.h | 1 -
include/linux/sched.h | 1 -
include/linux/syscalls.h | 1 -
include/scsi/libsas.h | 1 -
13 files changed, 0 insertions(+), 15 deletions(-)
diff --git a/include/asm-blackfin/dma.h b/include/asm-blackfin/dma.h
index 5abaa2c..16d4935 100644
--- a/include/asm-blackfin/dma.h
+++ b/include/asm-blackfin/dma.h
@@ -33,7 +33,6 @@
#include <linux/slab.h>
#include <asm/irq.h>
#include <asm/signal.h>
-#include <asm/semaphore.h>
#include <linux/kernel.h>
#include <asm/mach/dma.h>
diff --git a/include/asm-ia64/sn/nodepda.h b/include/asm-ia64/sn/nodepda.h
index 6f6d69e..ee118b9 100644
--- a/include/asm-ia64/sn/nodepda.h
+++ b/include/asm-ia64/sn/nodepda.h
@@ -9,7 +9,6 @@
#define _ASM_IA64_SN_NODEPDA_H
-#include <asm/semaphore.h>
#include <asm/irq.h>
#include <asm/sn/arch.h>
#include <asm/sn/intr.h>
diff --git a/include/asm-ppc/ocp.h b/include/asm-ppc/ocp.h
index 1379a4f..3909a2e 100644
--- a/include/asm-ppc/ocp.h
+++ b/include/asm-ppc/ocp.h
@@ -31,7 +31,6 @@
#include <asm/mmu.h>
#include <asm/ocp_ids.h>
-#include <asm/semaphore.h>
#ifdef CONFIG_PPC_OCP
diff --git a/include/linux/cpu.h b/include/linux/cpu.h
index 0be8d65..f212fa9 100644
--- a/include/linux/cpu.h
+++ b/include/linux/cpu.h
@@ -23,7 +23,6 @@
#include <linux/node.h>
#include <linux/compiler.h>
#include <linux/cpumask.h>
-#include <asm/semaphore.h>
#include <linux/mutex.h>
struct cpu {
diff --git a/include/linux/ide.h b/include/linux/ide.h
index a3b69c1..68510a0 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -23,7 +23,6 @@
#include <asm/byteorder.h>
#include <asm/system.h>
#include <asm/io.h>
-#include <asm/semaphore.h>
#include <asm/mutex.h>
#if defined(CRIS) || defined(FRV)
diff --git a/include/linux/if_pppox.h b/include/linux/if_pppox.h
index 40743e0..6fb7f17 100644
--- a/include/linux/if_pppox.h
+++ b/include/linux/if_pppox.h
@@ -24,7 +24,6 @@
#include <linux/if_ether.h>
#include <linux/if.h>
#include <linux/netdevice.h>
-#include <asm/semaphore.h>
#include <linux/ppp_channel.h>
#endif /* __KERNEL__ */
#include <linux/if_pppol2tp.h>
diff --git a/include/linux/jbd.h b/include/linux/jbd.h
index b18fd3b..ec52d0b 100644
--- a/include/linux/jbd.h
+++ b/include/linux/jbd.h
@@ -32,8 +32,6 @@
#include <linux/timer.h>
#include <linux/lockdep.h>
-#include <asm/semaphore.h>
-
#define journal_oom_retry 1
/*
diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h
index 2cbf6fd..05e2b30 100644
--- a/include/linux/jbd2.h
+++ b/include/linux/jbd2.h
@@ -30,8 +30,6 @@
#include <linux/bit_spinlock.h>
#include <linux/mutex.h>
#include <linux/timer.h>
-
-#include <asm/semaphore.h>
#endif
#define journal_oom_retry 1
diff --git a/include/linux/kernelcapi.h b/include/linux/kernelcapi.h
index 8c4350a..a53e932 100644
--- a/include/linux/kernelcapi.h
+++ b/include/linux/kernelcapi.h
@@ -48,7 +48,6 @@ typedef struct kcapi_carddef {
#include <linux/list.h>
#include <linux/skbuff.h>
#include <linux/workqueue.h>
-#include <asm/semaphore.h>
#define KCI_CONTRUP 0 /* arg: struct capi_profile */
#define KCI_CONTRDOWN 1 /* arg: NULL */
diff --git a/include/linux/raid/md.h b/include/linux/raid/md.h
index fbaeda7..8ab630b 100644
--- a/include/linux/raid/md.h
+++ b/include/linux/raid/md.h
@@ -19,7 +19,6 @@
#define _MD_H
#include <linux/blkdev.h>
-#include <asm/semaphore.h>
#include <linux/major.h>
#include <linux/ioctl.h>
#include <linux/types.h>
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 2c9621f..601d100 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -61,7 +61,6 @@ struct sched_param {
#include <linux/mm_types.h>
#include <asm/system.h>
-#include <asm/semaphore.h>
#include <asm/page.h>
#include <asm/ptrace.h>
#include <asm/cputime.h>
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 4c2577b..8df6d13 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -60,7 +60,6 @@ struct getcpu_cache;
#include <linux/capability.h>
#include <linux/list.h>
#include <linux/sem.h>
-#include <asm/semaphore.h>
#include <asm/siginfo.h>
#include <asm/signal.h>
#include <linux/quota.h>
diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h
index 3ffd6b5..896db51 100644
--- a/include/scsi/libsas.h
+++ b/include/scsi/libsas.h
@@ -32,7 +32,6 @@
#include <scsi/sas.h>
#include <linux/libata.h>
#include <linux/list.h>
-#include <asm/semaphore.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_transport_sas.h>
--
1.5.4.1
^ permalink raw reply related [flat|nested] 30+ messages in thread
* [PATCH 08/12] kernel: Remove unnecessary inclusions of asm/semaphore.h
2008-02-28 6:33 ` [PATCH 07/12] include: " Matthew Wilcox
@ 2008-02-28 6:33 ` Matthew Wilcox
2008-02-28 6:33 ` [PATCH 09/12] lib: " Matthew Wilcox
0 siblings, 1 reply; 30+ messages in thread
From: Matthew Wilcox @ 2008-02-28 6:33 UTC (permalink / raw)
To: linux-kernel; +Cc: Matthew Wilcox, Matthew Wilcox
None of these files use any of the functionality promised by
asm/semaphore.h.
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
---
kernel/kexec.c | 1 -
kernel/kthread.c | 1 -
kernel/module.c | 3 +--
kernel/posix-timers.c | 1 -
kernel/profile.c | 1 -
kernel/stop_machine.c | 1 -
6 files changed, 1 insertions(+), 7 deletions(-)
diff --git a/kernel/kexec.c b/kernel/kexec.c
index 06a0e27..6782dce 100644
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -29,7 +29,6 @@
#include <asm/uaccess.h>
#include <asm/io.h>
#include <asm/system.h>
-#include <asm/semaphore.h>
#include <asm/sections.h>
/* Per cpu memory for storing cpu states in case of system crash. */
diff --git a/kernel/kthread.c b/kernel/kthread.c
index 0ac8878..92dd1bc 100644
--- a/kernel/kthread.c
+++ b/kernel/kthread.c
@@ -13,7 +13,6 @@
#include <linux/file.h>
#include <linux/module.h>
#include <linux/mutex.h>
-#include <asm/semaphore.h>
#define KTHREAD_NICE_LEVEL (-5)
diff --git a/kernel/module.c b/kernel/module.c
index 901cd6a..88092f7 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -43,7 +43,6 @@
#include <linux/mutex.h>
#include <linux/unwind.h>
#include <asm/uaccess.h>
-#include <asm/semaphore.h>
#include <asm/cacheflush.h>
#include <linux/license.h>
#include <asm/sections.h>
@@ -664,7 +663,7 @@ static void free_module(struct module *mod);
static void wait_for_zero_refcount(struct module *mod)
{
- /* Since we might sleep for some time, drop the semaphore first */
+ /* Since we might sleep for some time, release the mutex first */
mutex_unlock(&module_mutex);
for (;;) {
DEBUGP("Looking at refcount...\n");
diff --git a/kernel/posix-timers.c b/kernel/posix-timers.c
index a9b0420..8476956 100644
--- a/kernel/posix-timers.c
+++ b/kernel/posix-timers.c
@@ -37,7 +37,6 @@
#include <linux/mutex.h>
#include <asm/uaccess.h>
-#include <asm/semaphore.h>
#include <linux/list.h>
#include <linux/init.h>
#include <linux/compiler.h>
diff --git a/kernel/profile.c b/kernel/profile.c
index 3b7a1b0..606d738 100644
--- a/kernel/profile.c
+++ b/kernel/profile.c
@@ -23,7 +23,6 @@
#include <linux/highmem.h>
#include <linux/mutex.h>
#include <asm/sections.h>
-#include <asm/semaphore.h>
#include <asm/irq_regs.h>
#include <asm/ptrace.h>
diff --git a/kernel/stop_machine.c b/kernel/stop_machine.c
index 6f4e0e1..3da3c2c 100644
--- a/kernel/stop_machine.c
+++ b/kernel/stop_machine.c
@@ -11,7 +11,6 @@
#include <linux/interrupt.h>
#include <asm/atomic.h>
-#include <asm/semaphore.h>
#include <asm/uaccess.h>
/* Since we effect priority and affinity (both of which are visible
--
1.5.4.1
^ permalink raw reply related [flat|nested] 30+ messages in thread
* [PATCH 09/12] lib: Remove unnecessary inclusions of asm/semaphore.h
2008-02-28 6:33 ` [PATCH 08/12] kernel: " Matthew Wilcox
@ 2008-02-28 6:33 ` Matthew Wilcox
2008-02-28 6:33 ` [PATCH 10/12] security: " Matthew Wilcox
0 siblings, 1 reply; 30+ messages in thread
From: Matthew Wilcox @ 2008-02-28 6:33 UTC (permalink / raw)
To: linux-kernel; +Cc: Matthew Wilcox, Matthew Wilcox
reed_solomon doesn't use any of the functionality promised by
asm/semaphore.h.
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
---
lib/reed_solomon/reed_solomon.c | 1 -
1 files changed, 0 insertions(+), 1 deletions(-)
diff --git a/lib/reed_solomon/reed_solomon.c b/lib/reed_solomon/reed_solomon.c
index 3ea2db9..06d04cf 100644
--- a/lib/reed_solomon/reed_solomon.c
+++ b/lib/reed_solomon/reed_solomon.c
@@ -45,7 +45,6 @@
#include <linux/rslib.h>
#include <linux/slab.h>
#include <linux/mutex.h>
-#include <asm/semaphore.h>
/* This list holds all currently allocated rs control structures */
static LIST_HEAD (rslist);
--
1.5.4.1
^ permalink raw reply related [flat|nested] 30+ messages in thread
* [PATCH 10/12] security: Remove unnecessary inclusions of asm/semaphore.h
2008-02-28 6:33 ` [PATCH 09/12] lib: " Matthew Wilcox
@ 2008-02-28 6:33 ` Matthew Wilcox
2008-02-28 6:34 ` [PATCH 11/12] Generic semaphore implementation Matthew Wilcox
0 siblings, 1 reply; 30+ messages in thread
From: Matthew Wilcox @ 2008-02-28 6:33 UTC (permalink / raw)
To: linux-kernel; +Cc: Matthew Wilcox, Matthew Wilcox
None of these files use any of the functionality promised by
asm/semaphore.h.
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
---
security/selinux/selinuxfs.c | 1 -
security/selinux/ss/conditional.c | 1 -
security/selinux/xfrm.c | 1 -
3 files changed, 0 insertions(+), 3 deletions(-)
diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c
index 0341567..443cdac 100644
--- a/security/selinux/selinuxfs.c
+++ b/security/selinux/selinuxfs.c
@@ -28,7 +28,6 @@
#include <linux/percpu.h>
#include <linux/audit.h>
#include <asm/uaccess.h>
-#include <asm/semaphore.h>
/* selinuxfs pseudo filesystem for exporting the security policy API.
Based on the proc code and the fs/nfsd/nfsctl.c code. */
diff --git a/security/selinux/ss/conditional.c b/security/selinux/ss/conditional.c
index 50ad85d..a115892 100644
--- a/security/selinux/ss/conditional.c
+++ b/security/selinux/ss/conditional.c
@@ -11,7 +11,6 @@
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/spinlock.h>
-#include <asm/semaphore.h>
#include <linux/slab.h>
#include "security.h"
diff --git a/security/selinux/xfrm.c b/security/selinux/xfrm.c
index 7e15820..041d8d1 100644
--- a/security/selinux/xfrm.c
+++ b/security/selinux/xfrm.c
@@ -45,7 +45,6 @@
#include <net/xfrm.h>
#include <net/checksum.h>
#include <net/udp.h>
-#include <asm/semaphore.h>
#include <asm/atomic.h>
#include "avc.h"
--
1.5.4.1
^ permalink raw reply related [flat|nested] 30+ messages in thread
* [PATCH 11/12] Generic semaphore implementation
2008-02-28 6:33 ` [PATCH 10/12] security: " Matthew Wilcox
@ 2008-02-28 6:34 ` Matthew Wilcox
2008-02-28 6:34 ` [PATCH 12/12] Convert asm/semaphore.h users to linux/semaphore.h Matthew Wilcox
` (3 more replies)
0 siblings, 4 replies; 30+ messages in thread
From: Matthew Wilcox @ 2008-02-28 6:34 UTC (permalink / raw)
To: linux-kernel; +Cc: Matthew Wilcox, Matthew Wilcox
Semaphores are no longer performance-critical, so a generic C
implementation is better for maintainability, debuggability and
extensibility.
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
---
arch/alpha/kernel/Makefile | 2 +-
arch/alpha/kernel/alpha_ksyms.c | 9 -
arch/alpha/kernel/semaphore.c | 224 --------------------------
arch/arm/kernel/Makefile | 2 +-
arch/arm/kernel/semaphore.c | 221 --------------------------
arch/avr32/kernel/Makefile | 2 +-
arch/avr32/kernel/semaphore.c | 148 -----------------
arch/blackfin/Kconfig | 4 -
arch/blackfin/kernel/bfin_ksyms.c | 5 -
arch/cris/kernel/Makefile | 3 +-
arch/cris/kernel/crisksyms.c | 7 -
arch/cris/kernel/semaphore.c | 129 ---------------
arch/frv/kernel/Makefile | 2 +-
arch/frv/kernel/frv_ksyms.c | 1 -
arch/frv/kernel/semaphore.c | 155 ------------------
arch/h8300/kernel/Makefile | 2 +-
arch/h8300/kernel/h8300_ksyms.c | 1 -
arch/h8300/kernel/semaphore.c | 132 ----------------
arch/ia64/kernel/Makefile | 2 +-
arch/ia64/kernel/ia64_ksyms.c | 6 -
arch/ia64/kernel/semaphore.c | 165 -------------------
arch/m32r/kernel/Makefile | 2 +-
arch/m32r/kernel/m32r_ksyms.c | 5 -
arch/m32r/kernel/semaphore.c | 185 ----------------------
arch/m68k/kernel/Makefile | 2 +-
arch/m68k/kernel/m68k_ksyms.c | 6 -
arch/m68k/kernel/semaphore.c | 132 ----------------
arch/m68k/lib/Makefile | 2 +-
arch/m68k/lib/semaphore.S | 53 ------
arch/m68knommu/kernel/Makefile | 2 +-
arch/m68knommu/kernel/m68k_ksyms.c | 6 -
arch/m68knommu/kernel/semaphore.c | 133 ----------------
arch/m68knommu/lib/Makefile | 2 +-
arch/m68knommu/lib/semaphore.S | 66 --------
arch/mips/kernel/Makefile | 2 +-
arch/mips/kernel/semaphore.c | 168 --------------------
arch/mn10300/kernel/Makefile | 2 +-
arch/mn10300/kernel/semaphore.c | 149 -----------------
arch/parisc/kernel/Makefile | 2 +-
arch/parisc/kernel/parisc_ksyms.c | 5 -
arch/parisc/kernel/semaphore.c | 102 ------------
arch/powerpc/kernel/Makefile | 2 +-
arch/powerpc/kernel/ppc_ksyms.c | 1 -
arch/powerpc/kernel/semaphore.c | 135 ----------------
arch/ppc/kernel/semaphore.c | 131 ---------------
arch/s390/kernel/Makefile | 2 +-
arch/s390/kernel/s390_ksyms.c | 7 -
arch/s390/kernel/semaphore.c | 108 -------------
arch/sh/kernel/Makefile_32 | 2 +-
arch/sh/kernel/Makefile_64 | 2 +-
arch/sh/kernel/semaphore.c | 139 ----------------
arch/sh/kernel/sh_ksyms_32.c | 7 -
arch/sh/kernel/sh_ksyms_64.c | 4 -
arch/sparc/kernel/Makefile | 2 +-
arch/sparc/kernel/semaphore.c | 155 ------------------
arch/sparc/kernel/sparc_ksyms.c | 5 -
arch/sparc64/kernel/Makefile | 2 +-
arch/sparc64/kernel/semaphore.c | 254 ------------------------------
arch/sparc64/kernel/sparc64_ksyms.c | 6 -
arch/um/Kconfig.i386 | 39 +++++-
arch/um/Kconfig.x86_64 | 6 +-
arch/um/sys-i386/ksyms.c | 12 --
arch/um/sys-ppc/Makefile | 8 +-
arch/um/sys-x86_64/ksyms.c | 13 +--
arch/v850/kernel/Makefile | 2 +-
arch/v850/kernel/semaphore.c | 166 -------------------
arch/v850/kernel/v850_ksyms.c | 7 -
arch/x86/Kconfig | 7 -
arch/x86/kernel/i386_ksyms_32.c | 5 -
arch/x86/kernel/x8664_ksyms_64.c | 6 -
arch/x86/lib/semaphore_32.S | 83 ----------
arch/x86/lib/thunk_64.S | 5 -
arch/xtensa/kernel/Makefile | 2 +-
arch/xtensa/kernel/semaphore.c | 226 --------------------------
arch/xtensa/kernel/xtensa_ksyms.c | 9 -
include/asm-alpha/semaphore.h | 150 +-----------------
include/asm-arm/semaphore-helper.h | 84 ----------
include/asm-arm/semaphore.h | 99 +------------
include/asm-avr32/semaphore.h | 109 +-------------
include/asm-blackfin/semaphore-helper.h | 82 ----------
include/asm-blackfin/semaphore.h | 106 +------------
include/asm-cris/semaphore-helper.h | 78 ---------
include/asm-cris/semaphore.h | 134 +----------------
include/asm-frv/semaphore.h | 156 +------------------
include/asm-h8300/semaphore-helper.h | 85 ----------
include/asm-h8300/semaphore.h | 191 +----------------------
include/asm-ia64/semaphore.h | 100 +------------
include/asm-m32r/semaphore.h | 145 +-----------------
include/asm-m68k/semaphore-helper.h | 142 -----------------
include/asm-m68k/semaphore.h | 164 +-------------------
include/asm-m68knommu/semaphore-helper.h | 82 ----------
include/asm-m68knommu/semaphore.h | 154 +------------------
include/asm-mips/semaphore.h | 109 +-------------
include/asm-mn10300/semaphore.h | 170 +--------------------
include/asm-parisc/semaphore-helper.h | 89 -----------
include/asm-parisc/semaphore.h | 146 +-----------------
include/asm-powerpc/semaphore.h | 95 +-----------
include/asm-s390/semaphore.h | 108 +-------------
include/asm-sh/semaphore-helper.h | 89 -----------
include/asm-sh/semaphore.h | 116 +--------------
include/asm-sparc/semaphore.h | 193 +----------------------
include/asm-sparc64/semaphore.h | 54 +------
include/asm-um/semaphore.h | 7 +-
include/asm-v850/semaphore.h | 85 +----------
include/asm-x86/semaphore.h | 6 +-
include/asm-x86/semaphore_32.h | 175 --------------------
include/asm-x86/semaphore_64.h | 180 ---------------------
include/asm-xtensa/semaphore.h | 100 +------------
include/linux/semaphore.h | 81 ++++++++++
kernel/Makefile | 2 +-
kernel/semaphore.c | 204 ++++++++++++++++++++++++
lib/Makefile | 1 -
lib/semaphore-sleepers.c | 176 ---------------------
113 files changed, 374 insertions(+), 7681 deletions(-)
delete mode 100644 arch/alpha/kernel/semaphore.c
delete mode 100644 arch/arm/kernel/semaphore.c
delete mode 100644 arch/avr32/kernel/semaphore.c
delete mode 100644 arch/cris/kernel/semaphore.c
delete mode 100644 arch/frv/kernel/semaphore.c
delete mode 100644 arch/h8300/kernel/semaphore.c
delete mode 100644 arch/ia64/kernel/semaphore.c
delete mode 100644 arch/m32r/kernel/semaphore.c
delete mode 100644 arch/m68k/kernel/semaphore.c
delete mode 100644 arch/m68k/lib/semaphore.S
delete mode 100644 arch/m68knommu/kernel/semaphore.c
delete mode 100644 arch/m68knommu/lib/semaphore.S
delete mode 100644 arch/mips/kernel/semaphore.c
delete mode 100644 arch/mn10300/kernel/semaphore.c
delete mode 100644 arch/parisc/kernel/semaphore.c
delete mode 100644 arch/powerpc/kernel/semaphore.c
delete mode 100644 arch/ppc/kernel/semaphore.c
delete mode 100644 arch/s390/kernel/semaphore.c
delete mode 100644 arch/sh/kernel/semaphore.c
delete mode 100644 arch/sparc/kernel/semaphore.c
delete mode 100644 arch/sparc64/kernel/semaphore.c
delete mode 100644 arch/v850/kernel/semaphore.c
delete mode 100644 arch/xtensa/kernel/semaphore.c
delete mode 100644 include/asm-arm/semaphore-helper.h
delete mode 100644 include/asm-blackfin/semaphore-helper.h
delete mode 100644 include/asm-cris/semaphore-helper.h
delete mode 100644 include/asm-h8300/semaphore-helper.h
delete mode 100644 include/asm-m68k/semaphore-helper.h
delete mode 100644 include/asm-m68knommu/semaphore-helper.h
delete mode 100644 include/asm-parisc/semaphore-helper.h
delete mode 100644 include/asm-sh/semaphore-helper.h
delete mode 100644 include/asm-x86/semaphore_32.h
delete mode 100644 include/asm-x86/semaphore_64.h
create mode 100644 include/linux/semaphore.h
create mode 100644 kernel/semaphore.c
delete mode 100644 lib/semaphore-sleepers.c
diff --git a/arch/alpha/kernel/Makefile b/arch/alpha/kernel/Makefile
index dccf052..ac706c1 100644
--- a/arch/alpha/kernel/Makefile
+++ b/arch/alpha/kernel/Makefile
@@ -7,7 +7,7 @@ EXTRA_AFLAGS := $(KBUILD_CFLAGS)
EXTRA_CFLAGS := -Werror -Wno-sign-compare
obj-y := entry.o traps.o process.o init_task.o osf_sys.o irq.o \
- irq_alpha.o signal.o setup.o ptrace.o time.o semaphore.o \
+ irq_alpha.o signal.o setup.o ptrace.o time.o \
alpha_ksyms.o systbls.o err_common.o io.o
obj-$(CONFIG_VGA_HOSE) += console.o
diff --git a/arch/alpha/kernel/alpha_ksyms.c b/arch/alpha/kernel/alpha_ksyms.c
index e9762a3..d96e742 100644
--- a/arch/alpha/kernel/alpha_ksyms.c
+++ b/arch/alpha/kernel/alpha_ksyms.c
@@ -77,15 +77,6 @@ EXPORT_SYMBOL(__do_clear_user);
EXPORT_SYMBOL(__strncpy_from_user);
EXPORT_SYMBOL(__strnlen_user);
-/* Semaphore helper functions. */
-EXPORT_SYMBOL(__down_failed);
-EXPORT_SYMBOL(__down_failed_interruptible);
-EXPORT_SYMBOL(__up_wakeup);
-EXPORT_SYMBOL(down);
-EXPORT_SYMBOL(down_interruptible);
-EXPORT_SYMBOL(down_trylock);
-EXPORT_SYMBOL(up);
-
/*
* SMP-specific symbols.
*/
diff --git a/arch/alpha/kernel/semaphore.c b/arch/alpha/kernel/semaphore.c
deleted file mode 100644
index 8d2982a..0000000
--- a/arch/alpha/kernel/semaphore.c
+++ /dev/null
@@ -1,224 +0,0 @@
-/*
- * Alpha semaphore implementation.
- *
- * (C) Copyright 1996 Linus Torvalds
- * (C) Copyright 1999, 2000 Richard Henderson
- */
-
-#include <linux/errno.h>
-#include <linux/sched.h>
-#include <linux/init.h>
-
-/*
- * This is basically the PPC semaphore scheme ported to use
- * the Alpha ll/sc sequences, so see the PPC code for
- * credits.
- */
-
-/*
- * Atomically update sem->count.
- * This does the equivalent of the following:
- *
- * old_count = sem->count;
- * tmp = MAX(old_count, 0) + incr;
- * sem->count = tmp;
- * return old_count;
- */
-static inline int __sem_update_count(struct semaphore *sem, int incr)
-{
- long old_count, tmp = 0;
-
- __asm__ __volatile__(
- "1: ldl_l %0,%2\n"
- " cmovgt %0,%0,%1\n"
- " addl %1,%3,%1\n"
- " stl_c %1,%2\n"
- " beq %1,2f\n"
- " mb\n"
- ".subsection 2\n"
- "2: br 1b\n"
- ".previous"
- : "=&r" (old_count), "=&r" (tmp), "=m" (sem->count)
- : "Ir" (incr), "1" (tmp), "m" (sem->count));
-
- return old_count;
-}
-
-/*
- * Perform the "down" function. Return zero for semaphore acquired,
- * return negative for signalled out of the function.
- *
- * If called from down, the return is ignored and the wait loop is
- * not interruptible. This means that a task waiting on a semaphore
- * using "down()" cannot be killed until someone does an "up()" on
- * the semaphore.
- *
- * If called from down_interruptible, the return value gets checked
- * upon return. If the return value is negative then the task continues
- * with the negative value in the return register (it can be tested by
- * the caller).
- *
- * Either form may be used in conjunction with "up()".
- */
-
-void __sched
-__down_failed(struct semaphore *sem)
-{
- struct task_struct *tsk = current;
- DECLARE_WAITQUEUE(wait, tsk);
-
-#ifdef CONFIG_DEBUG_SEMAPHORE
- printk("%s(%d): down failed(%p)\n",
- tsk->comm, task_pid_nr(tsk), sem);
-#endif
-
- tsk->state = TASK_UNINTERRUPTIBLE;
- wmb();
- add_wait_queue_exclusive(&sem->wait, &wait);
-
- /*
- * Try to get the semaphore. If the count is > 0, then we've
- * got the semaphore; we decrement count and exit the loop.
- * If the count is 0 or negative, we set it to -1, indicating
- * that we are asleep, and then sleep.
- */
- while (__sem_update_count(sem, -1) <= 0) {
- schedule();
- set_task_state(tsk, TASK_UNINTERRUPTIBLE);
- }
- remove_wait_queue(&sem->wait, &wait);
- tsk->state = TASK_RUNNING;
-
- /*
- * If there are any more sleepers, wake one of them up so
- * that it can either get the semaphore, or set count to -1
- * indicating that there are still processes sleeping.
- */
- wake_up(&sem->wait);
-
-#ifdef CONFIG_DEBUG_SEMAPHORE
- printk("%s(%d): down acquired(%p)\n",
- tsk->comm, task_pid_nr(tsk), sem);
-#endif
-}
-
-int __sched
-__down_failed_interruptible(struct semaphore *sem)
-{
- struct task_struct *tsk = current;
- DECLARE_WAITQUEUE(wait, tsk);
- long ret = 0;
-
-#ifdef CONFIG_DEBUG_SEMAPHORE
- printk("%s(%d): down failed(%p)\n",
- tsk->comm, task_pid_nr(tsk), sem);
-#endif
-
- tsk->state = TASK_INTERRUPTIBLE;
- wmb();
- add_wait_queue_exclusive(&sem->wait, &wait);
-
- while (__sem_update_count(sem, -1) <= 0) {
- if (signal_pending(current)) {
- /*
- * A signal is pending - give up trying.
- * Set sem->count to 0 if it is negative,
- * since we are no longer sleeping.
- */
- __sem_update_count(sem, 0);
- ret = -EINTR;
- break;
- }
- schedule();
- set_task_state(tsk, TASK_INTERRUPTIBLE);
- }
-
- remove_wait_queue(&sem->wait, &wait);
- tsk->state = TASK_RUNNING;
- wake_up(&sem->wait);
-
-#ifdef CONFIG_DEBUG_SEMAPHORE
- printk("%s(%d): down %s(%p)\n",
- current->comm, task_pid_nr(current),
- (ret < 0 ? "interrupted" : "acquired"), sem);
-#endif
- return ret;
-}
-
-void
-__up_wakeup(struct semaphore *sem)
-{
- /*
- * Note that we incremented count in up() before we came here,
- * but that was ineffective since the result was <= 0, and
- * any negative value of count is equivalent to 0.
- * This ends up setting count to 1, unless count is now > 0
- * (i.e. because some other cpu has called up() in the meantime),
- * in which case we just increment count.
- */
- __sem_update_count(sem, 1);
- wake_up(&sem->wait);
-}
-
-void __sched
-down(struct semaphore *sem)
-{
-#ifdef WAITQUEUE_DEBUG
- CHECK_MAGIC(sem->__magic);
-#endif
-#ifdef CONFIG_DEBUG_SEMAPHORE
- printk("%s(%d): down(%p) <count=%d> from %p\n",
- current->comm, task_pid_nr(current), sem,
- atomic_read(&sem->count), __builtin_return_address(0));
-#endif
- __down(sem);
-}
-
-int __sched
-down_interruptible(struct semaphore *sem)
-{
-#ifdef WAITQUEUE_DEBUG
- CHECK_MAGIC(sem->__magic);
-#endif
-#ifdef CONFIG_DEBUG_SEMAPHORE
- printk("%s(%d): down(%p) <count=%d> from %p\n",
- current->comm, task_pid_nr(current), sem,
- atomic_read(&sem->count), __builtin_return_address(0));
-#endif
- return __down_interruptible(sem);
-}
-
-int
-down_trylock(struct semaphore *sem)
-{
- int ret;
-
-#ifdef WAITQUEUE_DEBUG
- CHECK_MAGIC(sem->__magic);
-#endif
-
- ret = __down_trylock(sem);
-
-#ifdef CONFIG_DEBUG_SEMAPHORE
- printk("%s(%d): down_trylock %s from %p\n",
- current->comm, task_pid_nr(current),
- ret ? "failed" : "acquired",
- __builtin_return_address(0));
-#endif
-
- return ret;
-}
-
-void
-up(struct semaphore *sem)
-{
-#ifdef WAITQUEUE_DEBUG
- CHECK_MAGIC(sem->__magic);
-#endif
-#ifdef CONFIG_DEBUG_SEMAPHORE
- printk("%s(%d): up(%p) <count=%d> from %p\n",
- current->comm, task_pid_nr(current), sem,
- atomic_read(&sem->count), __builtin_return_address(0));
-#endif
- __up(sem);
-}
diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile
index 00d44c6..6235f72 100644
--- a/arch/arm/kernel/Makefile
+++ b/arch/arm/kernel/Makefile
@@ -7,7 +7,7 @@ AFLAGS_head.o := -DTEXT_OFFSET=$(TEXT_OFFSET)
# Object file lists.
obj-y := compat.o entry-armv.o entry-common.o irq.o \
- process.o ptrace.o semaphore.o setup.o signal.o \
+ process.o ptrace.o setup.o signal.o \
sys_arm.o stacktrace.o time.o traps.o
obj-$(CONFIG_ISA_DMA_API) += dma.o
diff --git a/arch/arm/kernel/semaphore.c b/arch/arm/kernel/semaphore.c
deleted file mode 100644
index 981fe5c..0000000
--- a/arch/arm/kernel/semaphore.c
+++ /dev/null
@@ -1,221 +0,0 @@
-/*
- * ARM semaphore implementation, taken from
- *
- * i386 semaphore implementation.
- *
- * (C) Copyright 1999 Linus Torvalds
- *
- * Modified for ARM by Russell King
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-#include <linux/module.h>
-#include <linux/sched.h>
-#include <linux/errno.h>
-#include <linux/init.h>
-
-#include <asm/semaphore.h>
-
-/*
- * Semaphores are implemented using a two-way counter:
- * The "count" variable is decremented for each process
- * that tries to acquire the semaphore, while the "sleeping"
- * variable is a count of such acquires.
- *
- * Notably, the inline "up()" and "down()" functions can
- * efficiently test if they need to do any extra work (up
- * needs to do something only if count was negative before
- * the increment operation.
- *
- * "sleeping" and the contention routine ordering is
- * protected by the semaphore spinlock.
- *
- * Note that these functions are only called when there is
- * contention on the lock, and as such all this is the
- * "non-critical" part of the whole semaphore business. The
- * critical part is the inline stuff in <asm/semaphore.h>
- * where we want to avoid any extra jumps and calls.
- */
-
-/*
- * Logic:
- * - only on a boundary condition do we need to care. When we go
- * from a negative count to a non-negative, we wake people up.
- * - when we go from a non-negative count to a negative do we
- * (a) synchronize with the "sleeper" count and (b) make sure
- * that we're on the wakeup list before we synchronize so that
- * we cannot lose wakeup events.
- */
-
-void __up(struct semaphore *sem)
-{
- wake_up(&sem->wait);
-}
-
-static DEFINE_SPINLOCK(semaphore_lock);
-
-void __sched __down(struct semaphore * sem)
-{
- struct task_struct *tsk = current;
- DECLARE_WAITQUEUE(wait, tsk);
- tsk->state = TASK_UNINTERRUPTIBLE;
- add_wait_queue_exclusive(&sem->wait, &wait);
-
- spin_lock_irq(&semaphore_lock);
- sem->sleepers++;
- for (;;) {
- int sleepers = sem->sleepers;
-
- /*
- * Add "everybody else" into it. They aren't
- * playing, because we own the spinlock.
- */
- if (!atomic_add_negative(sleepers - 1, &sem->count)) {
- sem->sleepers = 0;
- break;
- }
- sem->sleepers = 1; /* us - see -1 above */
- spin_unlock_irq(&semaphore_lock);
-
- schedule();
- tsk->state = TASK_UNINTERRUPTIBLE;
- spin_lock_irq(&semaphore_lock);
- }
- spin_unlock_irq(&semaphore_lock);
- remove_wait_queue(&sem->wait, &wait);
- tsk->state = TASK_RUNNING;
- wake_up(&sem->wait);
-}
-
-int __sched __down_interruptible(struct semaphore * sem)
-{
- int retval = 0;
- struct task_struct *tsk = current;
- DECLARE_WAITQUEUE(wait, tsk);
- tsk->state = TASK_INTERRUPTIBLE;
- add_wait_queue_exclusive(&sem->wait, &wait);
-
- spin_lock_irq(&semaphore_lock);
- sem->sleepers ++;
- for (;;) {
- int sleepers = sem->sleepers;
-
- /*
- * With signals pending, this turns into
- * the trylock failure case - we won't be
- * sleeping, and we* can't get the lock as
- * it has contention. Just correct the count
- * and exit.
- */
- if (signal_pending(current)) {
- retval = -EINTR;
- sem->sleepers = 0;
- atomic_add(sleepers, &sem->count);
- break;
- }
-
- /*
- * Add "everybody else" into it. They aren't
- * playing, because we own the spinlock. The
- * "-1" is because we're still hoping to get
- * the lock.
- */
- if (!atomic_add_negative(sleepers - 1, &sem->count)) {
- sem->sleepers = 0;
- break;
- }
- sem->sleepers = 1; /* us - see -1 above */
- spin_unlock_irq(&semaphore_lock);
-
- schedule();
- tsk->state = TASK_INTERRUPTIBLE;
- spin_lock_irq(&semaphore_lock);
- }
- spin_unlock_irq(&semaphore_lock);
- tsk->state = TASK_RUNNING;
- remove_wait_queue(&sem->wait, &wait);
- wake_up(&sem->wait);
- return retval;
-}
-
-/*
- * Trylock failed - make sure we correct for
- * having decremented the count.
- *
- * We could have done the trylock with a
- * single "cmpxchg" without failure cases,
- * but then it wouldn't work on a 386.
- */
-int __down_trylock(struct semaphore * sem)
-{
- int sleepers;
- unsigned long flags;
-
- spin_lock_irqsave(&semaphore_lock, flags);
- sleepers = sem->sleepers + 1;
- sem->sleepers = 0;
-
- /*
- * Add "everybody else" and us into it. They aren't
- * playing, because we own the spinlock.
- */
- if (!atomic_add_negative(sleepers, &sem->count))
- wake_up(&sem->wait);
-
- spin_unlock_irqrestore(&semaphore_lock, flags);
- return 1;
-}
-
-/*
- * The semaphore operations have a special calling sequence that
- * allow us to do a simpler in-line version of them. These routines
- * need to convert that sequence back into the C sequence when
- * there is contention on the semaphore.
- *
- * ip contains the semaphore pointer on entry. Save the C-clobbered
- * registers (r0 to r3 and lr), but not ip, as we use it as a return
- * value in some cases..
- * To remain AAPCS compliant (64-bit stack align) we save r4 as well.
- */
-asm(" .section .sched.text,\"ax\",%progbits \n\
- .align 5 \n\
- .globl __down_failed \n\
-__down_failed: \n\
- stmfd sp!, {r0 - r4, lr} \n\
- mov r0, ip \n\
- bl __down \n\
- ldmfd sp!, {r0 - r4, pc} \n\
- \n\
- .align 5 \n\
- .globl __down_interruptible_failed \n\
-__down_interruptible_failed: \n\
- stmfd sp!, {r0 - r4, lr} \n\
- mov r0, ip \n\
- bl __down_interruptible \n\
- mov ip, r0 \n\
- ldmfd sp!, {r0 - r4, pc} \n\
- \n\
- .align 5 \n\
- .globl __down_trylock_failed \n\
-__down_trylock_failed: \n\
- stmfd sp!, {r0 - r4, lr} \n\
- mov r0, ip \n\
- bl __down_trylock \n\
- mov ip, r0 \n\
- ldmfd sp!, {r0 - r4, pc} \n\
- \n\
- .align 5 \n\
- .globl __up_wakeup \n\
-__up_wakeup: \n\
- stmfd sp!, {r0 - r4, lr} \n\
- mov r0, ip \n\
- bl __up \n\
- ldmfd sp!, {r0 - r4, pc} \n\
- ");
-
-EXPORT_SYMBOL(__down_failed);
-EXPORT_SYMBOL(__down_interruptible_failed);
-EXPORT_SYMBOL(__down_trylock_failed);
-EXPORT_SYMBOL(__up_wakeup);
diff --git a/arch/avr32/kernel/Makefile b/arch/avr32/kernel/Makefile
index e4b6d12..18229d0 100644
--- a/arch/avr32/kernel/Makefile
+++ b/arch/avr32/kernel/Makefile
@@ -6,7 +6,7 @@ extra-y := head.o vmlinux.lds
obj-$(CONFIG_SUBARCH_AVR32B) += entry-avr32b.o
obj-y += syscall_table.o syscall-stubs.o irq.o
-obj-y += setup.o traps.o semaphore.o ocd.o ptrace.o
+obj-y += setup.o traps.o ocd.o ptrace.o
obj-y += signal.o sys_avr32.o process.o time.o
obj-y += init_task.o switch_to.o cpu.o
obj-$(CONFIG_MODULES) += module.o avr32_ksyms.o
diff --git a/arch/avr32/kernel/semaphore.c b/arch/avr32/kernel/semaphore.c
deleted file mode 100644
index 1e2705a..0000000
--- a/arch/avr32/kernel/semaphore.c
+++ /dev/null
@@ -1,148 +0,0 @@
-/*
- * AVR32 sempahore implementation.
- *
- * Copyright (C) 2004-2006 Atmel Corporation
- *
- * Based on linux/arch/i386/kernel/semaphore.c
- * Copyright (C) 1999 Linus Torvalds
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/sched.h>
-#include <linux/errno.h>
-#include <linux/module.h>
-
-#include <asm/semaphore.h>
-#include <asm/atomic.h>
-
-/*
- * Semaphores are implemented using a two-way counter:
- * The "count" variable is decremented for each process
- * that tries to acquire the semaphore, while the "sleeping"
- * variable is a count of such acquires.
- *
- * Notably, the inline "up()" and "down()" functions can
- * efficiently test if they need to do any extra work (up
- * needs to do something only if count was negative before
- * the increment operation.
- *
- * "sleeping" and the contention routine ordering is protected
- * by the spinlock in the semaphore's waitqueue head.
- *
- * Note that these functions are only called when there is
- * contention on the lock, and as such all this is the
- * "non-critical" part of the whole semaphore business. The
- * critical part is the inline stuff in <asm/semaphore.h>
- * where we want to avoid any extra jumps and calls.
- */
-
-/*
- * Logic:
- * - only on a boundary condition do we need to care. When we go
- * from a negative count to a non-negative, we wake people up.
- * - when we go from a non-negative count to a negative do we
- * (a) synchronize with the "sleeper" count and (b) make sure
- * that we're on the wakeup list before we synchronize so that
- * we cannot lose wakeup events.
- */
-
-void __up(struct semaphore *sem)
-{
- wake_up(&sem->wait);
-}
-EXPORT_SYMBOL(__up);
-
-void __sched __down(struct semaphore *sem)
-{
- struct task_struct *tsk = current;
- DECLARE_WAITQUEUE(wait, tsk);
- unsigned long flags;
-
- tsk->state = TASK_UNINTERRUPTIBLE;
- spin_lock_irqsave(&sem->wait.lock, flags);
- add_wait_queue_exclusive_locked(&sem->wait, &wait);
-
- sem->sleepers++;
- for (;;) {
- int sleepers = sem->sleepers;
-
- /*
- * Add "everybody else" into it. They aren't
- * playing, because we own the spinlock in
- * the wait_queue_head.
- */
- if (atomic_add_return(sleepers - 1, &sem->count) >= 0) {
- sem->sleepers = 0;
- break;
- }
- sem->sleepers = 1; /* us - see -1 above */
- spin_unlock_irqrestore(&sem->wait.lock, flags);
-
- schedule();
-
- spin_lock_irqsave(&sem->wait.lock, flags);
- tsk->state = TASK_UNINTERRUPTIBLE;
- }
- remove_wait_queue_locked(&sem->wait, &wait);
- wake_up_locked(&sem->wait);
- spin_unlock_irqrestore(&sem->wait.lock, flags);
- tsk->state = TASK_RUNNING;
-}
-EXPORT_SYMBOL(__down);
-
-int __sched __down_interruptible(struct semaphore *sem)
-{
- int retval = 0;
- struct task_struct *tsk = current;
- DECLARE_WAITQUEUE(wait, tsk);
- unsigned long flags;
-
- tsk->state = TASK_INTERRUPTIBLE;
- spin_lock_irqsave(&sem->wait.lock, flags);
- add_wait_queue_exclusive_locked(&sem->wait, &wait);
-
- sem->sleepers++;
- for (;;) {
- int sleepers = sem->sleepers;
-
- /*
- * With signals pending, this turns into the trylock
- * failure case - we won't be sleeping, and we can't
- * get the lock as it has contention. Just correct the
- * count and exit.
- */
- if (signal_pending(current)) {
- retval = -EINTR;
- sem->sleepers = 0;
- atomic_add(sleepers, &sem->count);
- break;
- }
-
- /*
- * Add "everybody else" into it. They aren't
- * playing, because we own the spinlock in
- * the wait_queue_head.
- */
- if (atomic_add_return(sleepers - 1, &sem->count) >= 0) {
- sem->sleepers = 0;
- break;
- }
- sem->sleepers = 1; /* us - see -1 above */
- spin_unlock_irqrestore(&sem->wait.lock, flags);
-
- schedule();
-
- spin_lock_irqsave(&sem->wait.lock, flags);
- tsk->state = TASK_INTERRUPTIBLE;
- }
- remove_wait_queue_locked(&sem->wait, &wait);
- wake_up_locked(&sem->wait);
- spin_unlock_irqrestore(&sem->wait.lock, flags);
-
- tsk->state = TASK_RUNNING;
- return retval;
-}
-EXPORT_SYMBOL(__down_interruptible);
diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig
index 589c6ac..2dd1f30 100644
--- a/arch/blackfin/Kconfig
+++ b/arch/blackfin/Kconfig
@@ -31,10 +31,6 @@ config ZONE_DMA
bool
default y
-config SEMAPHORE_SLEEPERS
- bool
- default y
-
config GENERIC_FIND_NEXT_BIT
bool
default y
diff --git a/arch/blackfin/kernel/bfin_ksyms.c b/arch/blackfin/kernel/bfin_ksyms.c
index 0bfbb26..053edff 100644
--- a/arch/blackfin/kernel/bfin_ksyms.c
+++ b/arch/blackfin/kernel/bfin_ksyms.c
@@ -42,11 +42,6 @@ EXPORT_SYMBOL(ip_fast_csum);
EXPORT_SYMBOL(kernel_thread);
-EXPORT_SYMBOL(__up);
-EXPORT_SYMBOL(__down);
-EXPORT_SYMBOL(__down_trylock);
-EXPORT_SYMBOL(__down_interruptible);
-
EXPORT_SYMBOL(is_in_rom);
EXPORT_SYMBOL(bfin_return_from_exception);
diff --git a/arch/cris/kernel/Makefile b/arch/cris/kernel/Makefile
index c8e8ea5..ee7bcd4 100644
--- a/arch/cris/kernel/Makefile
+++ b/arch/cris/kernel/Makefile
@@ -5,8 +5,7 @@
extra-y := vmlinux.lds
-obj-y := process.o traps.o irq.o ptrace.o setup.o \
- time.o sys_cris.o semaphore.o
+obj-y := process.o traps.o irq.o ptrace.o setup.o time.o sys_cris.o
obj-$(CONFIG_MODULES) += crisksyms.o
obj-$(CONFIG_MODULES) += module.o
diff --git a/arch/cris/kernel/crisksyms.c b/arch/cris/kernel/crisksyms.c
index 62f0e75..7ac000f 100644
--- a/arch/cris/kernel/crisksyms.c
+++ b/arch/cris/kernel/crisksyms.c
@@ -9,7 +9,6 @@
#include <linux/string.h>
#include <linux/tty.h>
-#include <asm/semaphore.h>
#include <asm/processor.h>
#include <asm/uaccess.h>
#include <asm/checksum.h>
@@ -49,12 +48,6 @@ EXPORT_SYMBOL(__negdi2);
EXPORT_SYMBOL(__ioremap);
EXPORT_SYMBOL(iounmap);
-/* Semaphore functions */
-EXPORT_SYMBOL(__up);
-EXPORT_SYMBOL(__down);
-EXPORT_SYMBOL(__down_interruptible);
-EXPORT_SYMBOL(__down_trylock);
-
/* Userspace access functions */
EXPORT_SYMBOL(__copy_user_zeroing);
EXPORT_SYMBOL(__copy_user);
diff --git a/arch/cris/kernel/semaphore.c b/arch/cris/kernel/semaphore.c
deleted file mode 100644
index f137a43..0000000
--- a/arch/cris/kernel/semaphore.c
+++ /dev/null
@@ -1,129 +0,0 @@
-/*
- * Generic semaphore code. Buyer beware. Do your own
- * specific changes in <asm/semaphore-helper.h>
- */
-
-#include <linux/sched.h>
-#include <asm/semaphore-helper.h>
-
-/*
- * Semaphores are implemented using a two-way counter:
- * The "count" variable is decremented for each process
- * that tries to sleep, while the "waking" variable is
- * incremented when the "up()" code goes to wake up waiting
- * processes.
- *
- * Notably, the inline "up()" and "down()" functions can
- * efficiently test if they need to do any extra work (up
- * needs to do something only if count was negative before
- * the increment operation.
- *
- * waking_non_zero() (from asm/semaphore.h) must execute
- * atomically.
- *
- * When __up() is called, the count was negative before
- * incrementing it, and we need to wake up somebody.
- *
- * This routine adds one to the count of processes that need to
- * wake up and exit. ALL waiting processes actually wake up but
- * only the one that gets to the "waking" field first will gate
- * through and acquire the semaphore. The others will go back
- * to sleep.
- *
- * Note that these functions are only called when there is
- * contention on the lock, and as such all this is the
- * "non-critical" part of the whole semaphore business. The
- * critical part is the inline stuff in <asm/semaphore.h>
- * where we want to avoid any extra jumps and calls.
- */
-void __up(struct semaphore *sem)
-{
- wake_one_more(sem);
- wake_up(&sem->wait);
-}
-
-/*
- * Perform the "down" function. Return zero for semaphore acquired,
- * return negative for signalled out of the function.
- *
- * If called from __down, the return is ignored and the wait loop is
- * not interruptible. This means that a task waiting on a semaphore
- * using "down()" cannot be killed until someone does an "up()" on
- * the semaphore.
- *
- * If called from __down_interruptible, the return value gets checked
- * upon return. If the return value is negative then the task continues
- * with the negative value in the return register (it can be tested by
- * the caller).
- *
- * Either form may be used in conjunction with "up()".
- *
- */
-
-#define DOWN_VAR \
- struct task_struct *tsk = current; \
- wait_queue_t wait; \
- init_waitqueue_entry(&wait, tsk);
-
-#define DOWN_HEAD(task_state) \
- \
- \
- tsk->state = (task_state); \
- add_wait_queue(&sem->wait, &wait); \
- \
- /* \
- * Ok, we're set up. sem->count is known to be less than zero \
- * so we must wait. \
- * \
- * We can let go the lock for purposes of waiting. \
- * We re-acquire it after awaking so as to protect \
- * all semaphore operations. \
- * \
- * If "up()" is called before we call waking_non_zero() then \
- * we will catch it right away. If it is called later then \
- * we will have to go through a wakeup cycle to catch it. \
- * \
- * Multiple waiters contend for the semaphore lock to see \
- * who gets to gate through and who has to wait some more. \
- */ \
- for (;;) {
-
-#define DOWN_TAIL(task_state) \
- tsk->state = (task_state); \
- } \
- tsk->state = TASK_RUNNING; \
- remove_wait_queue(&sem->wait, &wait);
-
-void __sched __down(struct semaphore * sem)
-{
- DOWN_VAR
- DOWN_HEAD(TASK_UNINTERRUPTIBLE)
- if (waking_non_zero(sem))
- break;
- schedule();
- DOWN_TAIL(TASK_UNINTERRUPTIBLE)
-}
-
-int __sched __down_interruptible(struct semaphore * sem)
-{
- int ret = 0;
- DOWN_VAR
- DOWN_HEAD(TASK_INTERRUPTIBLE)
-
- ret = waking_non_zero_interruptible(sem, tsk);
- if (ret)
- {
- if (ret == 1)
- /* ret != 0 only if we get interrupted -arca */
- ret = 0;
- break;
- }
- schedule();
- DOWN_TAIL(TASK_INTERRUPTIBLE)
- return ret;
-}
-
-int __down_trylock(struct semaphore * sem)
-{
- return waking_non_zero_trylock(sem);
-}
diff --git a/arch/frv/kernel/Makefile b/arch/frv/kernel/Makefile
index e8f73ed..c36f70b 100644
--- a/arch/frv/kernel/Makefile
+++ b/arch/frv/kernel/Makefile
@@ -9,7 +9,7 @@ extra-y:= head.o init_task.o vmlinux.lds
obj-y := $(heads-y) entry.o entry-table.o break.o switch_to.o kernel_thread.o \
kernel_execve.o process.o traps.o ptrace.o signal.o dma.o \
- sys_frv.o time.o semaphore.o setup.o frv_ksyms.o \
+ sys_frv.o time.o setup.o frv_ksyms.o \
debug-stub.o irq.o sleep.o uaccess.o
obj-$(CONFIG_GDBSTUB) += gdb-stub.o gdb-io.o
diff --git a/arch/frv/kernel/frv_ksyms.c b/arch/frv/kernel/frv_ksyms.c
index f772704..0316b3c 100644
--- a/arch/frv/kernel/frv_ksyms.c
+++ b/arch/frv/kernel/frv_ksyms.c
@@ -12,7 +12,6 @@
#include <asm/pgalloc.h>
#include <asm/irq.h>
#include <asm/io.h>
-#include <asm/semaphore.h>
#include <asm/checksum.h>
#include <asm/hardirq.h>
#include <asm/cacheflush.h>
diff --git a/arch/frv/kernel/semaphore.c b/arch/frv/kernel/semaphore.c
deleted file mode 100644
index 7ee3a14..0000000
--- a/arch/frv/kernel/semaphore.c
+++ /dev/null
@@ -1,155 +0,0 @@
-/* semaphore.c: FR-V semaphores
- *
- * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- * - Derived from lib/rwsem-spinlock.c
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#include <linux/sched.h>
-#include <linux/module.h>
-#include <asm/semaphore.h>
-
-struct sem_waiter {
- struct list_head list;
- struct task_struct *task;
-};
-
-#ifdef CONFIG_DEBUG_SEMAPHORE
-void semtrace(struct semaphore *sem, const char *str)
-{
- if (sem->debug)
- printk("[%d] %s({%d,%d})\n",
- current->pid,
- str,
- sem->counter,
- list_empty(&sem->wait_list) ? 0 : 1);
-}
-#else
-#define semtrace(SEM,STR) do { } while(0)
-#endif
-
-/*
- * wait for a token to be granted from a semaphore
- * - entered with lock held and interrupts disabled
- */
-void __down(struct semaphore *sem, unsigned long flags)
-{
- struct task_struct *tsk = current;
- struct sem_waiter waiter;
-
- semtrace(sem, "Entering __down");
-
- /* set up my own style of waitqueue */
- waiter.task = tsk;
- get_task_struct(tsk);
-
- list_add_tail(&waiter.list, &sem->wait_list);
-
- /* we don't need to touch the semaphore struct anymore */
- spin_unlock_irqrestore(&sem->wait_lock, flags);
-
- /* wait to be given the semaphore */
- set_task_state(tsk, TASK_UNINTERRUPTIBLE);
-
- for (;;) {
- if (list_empty(&waiter.list))
- break;
- schedule();
- set_task_state(tsk, TASK_UNINTERRUPTIBLE);
- }
-
- tsk->state = TASK_RUNNING;
- semtrace(sem, "Leaving __down");
-}
-
-EXPORT_SYMBOL(__down);
-
-/*
- * interruptibly wait for a token to be granted from a semaphore
- * - entered with lock held and interrupts disabled
- */
-int __down_interruptible(struct semaphore *sem, unsigned long flags)
-{
- struct task_struct *tsk = current;
- struct sem_waiter waiter;
- int ret;
-
- semtrace(sem,"Entering __down_interruptible");
-
- /* set up my own style of waitqueue */
- waiter.task = tsk;
- get_task_struct(tsk);
-
- list_add_tail(&waiter.list, &sem->wait_list);
-
- /* we don't need to touch the semaphore struct anymore */
- set_task_state(tsk, TASK_INTERRUPTIBLE);
-
- spin_unlock_irqrestore(&sem->wait_lock, flags);
-
- /* wait to be given the semaphore */
- ret = 0;
- for (;;) {
- if (list_empty(&waiter.list))
- break;
- if (unlikely(signal_pending(current)))
- goto interrupted;
- schedule();
- set_task_state(tsk, TASK_INTERRUPTIBLE);
- }
-
- out:
- tsk->state = TASK_RUNNING;
- semtrace(sem, "Leaving __down_interruptible");
- return ret;
-
- interrupted:
- spin_lock_irqsave(&sem->wait_lock, flags);
-
- if (!list_empty(&waiter.list)) {
- list_del(&waiter.list);
- ret = -EINTR;
- }
-
- spin_unlock_irqrestore(&sem->wait_lock, flags);
- if (ret == -EINTR)
- put_task_struct(current);
- goto out;
-}
-
-EXPORT_SYMBOL(__down_interruptible);
-
-/*
- * release a single token back to a semaphore
- * - entered with lock held and interrupts disabled
- */
-void __up(struct semaphore *sem)
-{
- struct task_struct *tsk;
- struct sem_waiter *waiter;
-
- semtrace(sem,"Entering __up");
-
- /* grant the token to the process at the front of the queue */
- waiter = list_entry(sem->wait_list.next, struct sem_waiter, list);
-
- /* We must be careful not to touch 'waiter' after we set ->task = NULL.
- * It is allocated on the waiter's stack and may become invalid at
- * any time after that point (due to a wakeup from another source).
- */
- list_del_init(&waiter->list);
- tsk = waiter->task;
- mb();
- waiter->task = NULL;
- wake_up_process(tsk);
- put_task_struct(tsk);
-
- semtrace(sem,"Leaving __up");
-}
-
-EXPORT_SYMBOL(__up);
diff --git a/arch/h8300/kernel/Makefile b/arch/h8300/kernel/Makefile
index 874f6ae..6c248c3 100644
--- a/arch/h8300/kernel/Makefile
+++ b/arch/h8300/kernel/Makefile
@@ -5,7 +5,7 @@
extra-y := vmlinux.lds
obj-y := process.o traps.o ptrace.o irq.o \
- sys_h8300.o time.o semaphore.o signal.o \
+ sys_h8300.o time.o signal.o \
setup.o gpio.o init_task.o syscalls.o \
entry.o
diff --git a/arch/h8300/kernel/h8300_ksyms.c b/arch/h8300/kernel/h8300_ksyms.c
index d1b1526..6866bd9 100644
--- a/arch/h8300/kernel/h8300_ksyms.c
+++ b/arch/h8300/kernel/h8300_ksyms.c
@@ -12,7 +12,6 @@
#include <asm/pgalloc.h>
#include <asm/irq.h>
#include <asm/io.h>
-#include <asm/semaphore.h>
#include <asm/checksum.h>
#include <asm/current.h>
#include <asm/gpio.h>
diff --git a/arch/h8300/kernel/semaphore.c b/arch/h8300/kernel/semaphore.c
deleted file mode 100644
index d12cbbf..0000000
--- a/arch/h8300/kernel/semaphore.c
+++ /dev/null
@@ -1,132 +0,0 @@
-/*
- * Generic semaphore code. Buyer beware. Do your own
- * specific changes in <asm/semaphore-helper.h>
- */
-
-#include <linux/sched.h>
-#include <linux/init.h>
-#include <asm/semaphore-helper.h>
-
-#ifndef CONFIG_RMW_INSNS
-spinlock_t semaphore_wake_lock;
-#endif
-
-/*
- * Semaphores are implemented using a two-way counter:
- * The "count" variable is decremented for each process
- * that tries to sleep, while the "waking" variable is
- * incremented when the "up()" code goes to wake up waiting
- * processes.
- *
- * Notably, the inline "up()" and "down()" functions can
- * efficiently test if they need to do any extra work (up
- * needs to do something only if count was negative before
- * the increment operation.
- *
- * waking_non_zero() (from asm/semaphore.h) must execute
- * atomically.
- *
- * When __up() is called, the count was negative before
- * incrementing it, and we need to wake up somebody.
- *
- * This routine adds one to the count of processes that need to
- * wake up and exit. ALL waiting processes actually wake up but
- * only the one that gets to the "waking" field first will gate
- * through and acquire the semaphore. The others will go back
- * to sleep.
- *
- * Note that these functions are only called when there is
- * contention on the lock, and as such all this is the
- * "non-critical" part of the whole semaphore business. The
- * critical part is the inline stuff in <asm/semaphore.h>
- * where we want to avoid any extra jumps and calls.
- */
-void __up(struct semaphore *sem)
-{
- wake_one_more(sem);
- wake_up(&sem->wait);
-}
-
-/*
- * Perform the "down" function. Return zero for semaphore acquired,
- * return negative for signalled out of the function.
- *
- * If called from __down, the return is ignored and the wait loop is
- * not interruptible. This means that a task waiting on a semaphore
- * using "down()" cannot be killed until someone does an "up()" on
- * the semaphore.
- *
- * If called from __down_interruptible, the return value gets checked
- * upon return. If the return value is negative then the task continues
- * with the negative value in the return register (it can be tested by
- * the caller).
- *
- * Either form may be used in conjunction with "up()".
- *
- */
-
-
-#define DOWN_HEAD(task_state) \
- \
- \
- current->state = (task_state); \
- add_wait_queue(&sem->wait, &wait); \
- \
- /* \
- * Ok, we're set up. sem->count is known to be less than zero \
- * so we must wait. \
- * \
- * We can let go the lock for purposes of waiting. \
- * We re-acquire it after awaking so as to protect \
- * all semaphore operations. \
- * \
- * If "up()" is called before we call waking_non_zero() then \
- * we will catch it right away. If it is called later then \
- * we will have to go through a wakeup cycle to catch it. \
- * \
- * Multiple waiters contend for the semaphore lock to see \
- * who gets to gate through and who has to wait some more. \
- */ \
- for (;;) {
-
-#define DOWN_TAIL(task_state) \
- current->state = (task_state); \
- } \
- current->state = TASK_RUNNING; \
- remove_wait_queue(&sem->wait, &wait);
-
-void __sched __down(struct semaphore * sem)
-{
- DECLARE_WAITQUEUE(wait, current);
-
- DOWN_HEAD(TASK_UNINTERRUPTIBLE)
- if (waking_non_zero(sem))
- break;
- schedule();
- DOWN_TAIL(TASK_UNINTERRUPTIBLE)
-}
-
-int __sched __down_interruptible(struct semaphore * sem)
-{
- DECLARE_WAITQUEUE(wait, current);
- int ret = 0;
-
- DOWN_HEAD(TASK_INTERRUPTIBLE)
-
- ret = waking_non_zero_interruptible(sem, current);
- if (ret)
- {
- if (ret == 1)
- /* ret != 0 only if we get interrupted -arca */
- ret = 0;
- break;
- }
- schedule();
- DOWN_TAIL(TASK_INTERRUPTIBLE)
- return ret;
-}
-
-int __down_trylock(struct semaphore * sem)
-{
- return waking_non_zero_trylock(sem);
-}
diff --git a/arch/ia64/kernel/Makefile b/arch/ia64/kernel/Makefile
index 33e5a59..13fd10e 100644
--- a/arch/ia64/kernel/Makefile
+++ b/arch/ia64/kernel/Makefile
@@ -6,7 +6,7 @@ extra-y := head.o init_task.o vmlinux.lds
obj-y := acpi.o entry.o efi.o efi_stub.o gate-data.o fsys.o ia64_ksyms.o irq.o irq_ia64.o \
irq_lsapic.o ivt.o machvec.o pal.o patch.o process.o perfmon.o ptrace.o sal.o \
- salinfo.o semaphore.o setup.o signal.o sys_ia64.o time.o traps.o unaligned.o \
+ salinfo.o setup.o signal.o sys_ia64.o time.o traps.o unaligned.o \
unwind.o mca.o mca_asm.o topology.o
obj-$(CONFIG_IA64_BRL_EMU) += brl_emu.o
diff --git a/arch/ia64/kernel/ia64_ksyms.c b/arch/ia64/kernel/ia64_ksyms.c
index 8e7193d..6da1f20 100644
--- a/arch/ia64/kernel/ia64_ksyms.c
+++ b/arch/ia64/kernel/ia64_ksyms.c
@@ -19,12 +19,6 @@ EXPORT_SYMBOL_GPL(empty_zero_page);
EXPORT_SYMBOL(ip_fast_csum); /* hand-coded assembly */
EXPORT_SYMBOL(csum_ipv6_magic);
-#include <asm/semaphore.h>
-EXPORT_SYMBOL(__down);
-EXPORT_SYMBOL(__down_interruptible);
-EXPORT_SYMBOL(__down_trylock);
-EXPORT_SYMBOL(__up);
-
#include <asm/page.h>
EXPORT_SYMBOL(clear_page);
diff --git a/arch/ia64/kernel/semaphore.c b/arch/ia64/kernel/semaphore.c
deleted file mode 100644
index 2724ef3..0000000
--- a/arch/ia64/kernel/semaphore.c
+++ /dev/null
@@ -1,165 +0,0 @@
-/*
- * IA-64 semaphore implementation (derived from x86 version).
- *
- * Copyright (C) 1999-2000, 2002 Hewlett-Packard Co
- * David Mosberger-Tang <davidm@hpl.hp.com>
- */
-
-/*
- * Semaphores are implemented using a two-way counter: The "count"
- * variable is decremented for each process that tries to acquire the
- * semaphore, while the "sleepers" variable is a count of such
- * acquires.
- *
- * Notably, the inline "up()" and "down()" functions can efficiently
- * test if they need to do any extra work (up needs to do something
- * only if count was negative before the increment operation.
- *
- * "sleeping" and the contention routine ordering is protected
- * by the spinlock in the semaphore's waitqueue head.
- *
- * Note that these functions are only called when there is contention
- * on the lock, and as such all this is the "non-critical" part of the
- * whole semaphore business. The critical part is the inline stuff in
- * <asm/semaphore.h> where we want to avoid any extra jumps and calls.
- */
-#include <linux/sched.h>
-#include <linux/init.h>
-
-#include <asm/errno.h>
-#include <asm/semaphore.h>
-
-/*
- * Logic:
- * - Only on a boundary condition do we need to care. When we go
- * from a negative count to a non-negative, we wake people up.
- * - When we go from a non-negative count to a negative do we
- * (a) synchronize with the "sleepers" count and (b) make sure
- * that we're on the wakeup list before we synchronize so that
- * we cannot lose wakeup events.
- */
-
-void
-__up (struct semaphore *sem)
-{
- wake_up(&sem->wait);
-}
-
-void __sched __down (struct semaphore *sem)
-{
- struct task_struct *tsk = current;
- DECLARE_WAITQUEUE(wait, tsk);
- unsigned long flags;
-
- tsk->state = TASK_UNINTERRUPTIBLE;
- spin_lock_irqsave(&sem->wait.lock, flags);
- add_wait_queue_exclusive_locked(&sem->wait, &wait);
-
- sem->sleepers++;
- for (;;) {
- int sleepers = sem->sleepers;
-
- /*
- * Add "everybody else" into it. They aren't
- * playing, because we own the spinlock in
- * the wait_queue_head.
- */
- if (!atomic_add_negative(sleepers - 1, &sem->count)) {
- sem->sleepers = 0;
- break;
- }
- sem->sleepers = 1; /* us - see -1 above */
- spin_unlock_irqrestore(&sem->wait.lock, flags);
-
- schedule();
-
- spin_lock_irqsave(&sem->wait.lock, flags);
- tsk->state = TASK_UNINTERRUPTIBLE;
- }
- remove_wait_queue_locked(&sem->wait, &wait);
- wake_up_locked(&sem->wait);
- spin_unlock_irqrestore(&sem->wait.lock, flags);
- tsk->state = TASK_RUNNING;
-}
-
-int __sched __down_interruptible (struct semaphore * sem)
-{
- int retval = 0;
- struct task_struct *tsk = current;
- DECLARE_WAITQUEUE(wait, tsk);
- unsigned long flags;
-
- tsk->state = TASK_INTERRUPTIBLE;
- spin_lock_irqsave(&sem->wait.lock, flags);
- add_wait_queue_exclusive_locked(&sem->wait, &wait);
-
- sem->sleepers ++;
- for (;;) {
- int sleepers = sem->sleepers;
-
- /*
- * With signals pending, this turns into
- * the trylock failure case - we won't be
- * sleeping, and we* can't get the lock as
- * it has contention. Just correct the count
- * and exit.
- */
- if (signal_pending(current)) {
- retval = -EINTR;
- sem->sleepers = 0;
- atomic_add(sleepers, &sem->count);
- break;
- }
-
- /*
- * Add "everybody else" into it. They aren't
- * playing, because we own the spinlock in
- * wait_queue_head. The "-1" is because we're
- * still hoping to get the semaphore.
- */
- if (!atomic_add_negative(sleepers - 1, &sem->count)) {
- sem->sleepers = 0;
- break;
- }
- sem->sleepers = 1; /* us - see -1 above */
- spin_unlock_irqrestore(&sem->wait.lock, flags);
-
- schedule();
-
- spin_lock_irqsave(&sem->wait.lock, flags);
- tsk->state = TASK_INTERRUPTIBLE;
- }
- remove_wait_queue_locked(&sem->wait, &wait);
- wake_up_locked(&sem->wait);
- spin_unlock_irqrestore(&sem->wait.lock, flags);
-
- tsk->state = TASK_RUNNING;
- return retval;
-}
-
-/*
- * Trylock failed - make sure we correct for having decremented the
- * count.
- */
-int
-__down_trylock (struct semaphore *sem)
-{
- unsigned long flags;
- int sleepers;
-
- spin_lock_irqsave(&sem->wait.lock, flags);
- sleepers = sem->sleepers + 1;
- sem->sleepers = 0;
-
- /*
- * Add "everybody else" and us into it. They aren't
- * playing, because we own the spinlock in the
- * wait_queue_head.
- */
- if (!atomic_add_negative(sleepers, &sem->count)) {
- wake_up_locked(&sem->wait);
- }
-
- spin_unlock_irqrestore(&sem->wait.lock, flags);
- return 1;
-}
diff --git a/arch/m32r/kernel/Makefile b/arch/m32r/kernel/Makefile
index e97e26e..09200d4 100644
--- a/arch/m32r/kernel/Makefile
+++ b/arch/m32r/kernel/Makefile
@@ -5,7 +5,7 @@
extra-y := head.o init_task.o vmlinux.lds
obj-y := process.o entry.o traps.o align.o irq.o setup.o time.o \
- m32r_ksyms.o sys_m32r.o semaphore.o signal.o ptrace.o
+ m32r_ksyms.o sys_m32r.o signal.o ptrace.o
obj-$(CONFIG_SMP) += smp.o smpboot.o
obj-$(CONFIG_MODULES) += module.o
diff --git a/arch/m32r/kernel/m32r_ksyms.c b/arch/m32r/kernel/m32r_ksyms.c
index 41a4c95..e6709fe 100644
--- a/arch/m32r/kernel/m32r_ksyms.c
+++ b/arch/m32r/kernel/m32r_ksyms.c
@@ -7,7 +7,6 @@
#include <linux/interrupt.h>
#include <linux/string.h>
-#include <asm/semaphore.h>
#include <asm/processor.h>
#include <asm/uaccess.h>
#include <asm/checksum.h>
@@ -22,10 +21,6 @@ EXPORT_SYMBOL(dump_fpu);
EXPORT_SYMBOL(__ioremap);
EXPORT_SYMBOL(iounmap);
EXPORT_SYMBOL(kernel_thread);
-EXPORT_SYMBOL(__down);
-EXPORT_SYMBOL(__down_interruptible);
-EXPORT_SYMBOL(__up);
-EXPORT_SYMBOL(__down_trylock);
/* Networking helper routines. */
/* Delay loops */
diff --git a/arch/m32r/kernel/semaphore.c b/arch/m32r/kernel/semaphore.c
deleted file mode 100644
index 940c2d3..0000000
--- a/arch/m32r/kernel/semaphore.c
+++ /dev/null
@@ -1,185 +0,0 @@
-/*
- * linux/arch/m32r/semaphore.c
- * orig : i386 2.6.4
- *
- * M32R semaphore implementation.
- *
- * Copyright (c) 2002 - 2004 Hitoshi Yamamoto
- */
-
-/*
- * i386 semaphore implementation.
- *
- * (C) Copyright 1999 Linus Torvalds
- *
- * Portions Copyright 1999 Red Hat, Inc.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * rw semaphores implemented November 1999 by Benjamin LaHaise <bcrl@kvack.org>
- */
-#include <linux/sched.h>
-#include <linux/err.h>
-#include <linux/init.h>
-#include <asm/semaphore.h>
-
-/*
- * Semaphores are implemented using a two-way counter:
- * The "count" variable is decremented for each process
- * that tries to acquire the semaphore, while the "sleeping"
- * variable is a count of such acquires.
- *
- * Notably, the inline "up()" and "down()" functions can
- * efficiently test if they need to do any extra work (up
- * needs to do something only if count was negative before
- * the increment operation.
- *
- * "sleeping" and the contention routine ordering is protected
- * by the spinlock in the semaphore's waitqueue head.
- *
- * Note that these functions are only called when there is
- * contention on the lock, and as such all this is the
- * "non-critical" part of the whole semaphore business. The
- * critical part is the inline stuff in <asm/semaphore.h>
- * where we want to avoid any extra jumps and calls.
- */
-
-/*
- * Logic:
- * - only on a boundary condition do we need to care. When we go
- * from a negative count to a non-negative, we wake people up.
- * - when we go from a non-negative count to a negative do we
- * (a) synchronize with the "sleeper" count and (b) make sure
- * that we're on the wakeup list before we synchronize so that
- * we cannot lose wakeup events.
- */
-
-asmlinkage void __up(struct semaphore *sem)
-{
- wake_up(&sem->wait);
-}
-
-asmlinkage void __sched __down(struct semaphore * sem)
-{
- struct task_struct *tsk = current;
- DECLARE_WAITQUEUE(wait, tsk);
- unsigned long flags;
-
- tsk->state = TASK_UNINTERRUPTIBLE;
- spin_lock_irqsave(&sem->wait.lock, flags);
- add_wait_queue_exclusive_locked(&sem->wait, &wait);
-
- sem->sleepers++;
- for (;;) {
- int sleepers = sem->sleepers;
-
- /*
- * Add "everybody else" into it. They aren't
- * playing, because we own the spinlock in
- * the wait_queue_head.
- */
- if (!atomic_add_negative(sleepers - 1, &sem->count)) {
- sem->sleepers = 0;
- break;
- }
- sem->sleepers = 1; /* us - see -1 above */
- spin_unlock_irqrestore(&sem->wait.lock, flags);
-
- schedule();
-
- spin_lock_irqsave(&sem->wait.lock, flags);
- tsk->state = TASK_UNINTERRUPTIBLE;
- }
- remove_wait_queue_locked(&sem->wait, &wait);
- wake_up_locked(&sem->wait);
- spin_unlock_irqrestore(&sem->wait.lock, flags);
- tsk->state = TASK_RUNNING;
-}
-
-asmlinkage int __sched __down_interruptible(struct semaphore * sem)
-{
- int retval = 0;
- struct task_struct *tsk = current;
- DECLARE_WAITQUEUE(wait, tsk);
- unsigned long flags;
-
- tsk->state = TASK_INTERRUPTIBLE;
- spin_lock_irqsave(&sem->wait.lock, flags);
- add_wait_queue_exclusive_locked(&sem->wait, &wait);
-
- sem->sleepers++;
- for (;;) {
- int sleepers = sem->sleepers;
-
- /*
- * With signals pending, this turns into
- * the trylock failure case - we won't be
- * sleeping, and we* can't get the lock as
- * it has contention. Just correct the count
- * and exit.
- */
- if (signal_pending(current)) {
- retval = -EINTR;
- sem->sleepers = 0;
- atomic_add(sleepers, &sem->count);
- break;
- }
-
- /*
- * Add "everybody else" into it. They aren't
- * playing, because we own the spinlock in
- * wait_queue_head. The "-1" is because we're
- * still hoping to get the semaphore.
- */
- if (!atomic_add_negative(sleepers - 1, &sem->count)) {
- sem->sleepers = 0;
- break;
- }
- sem->sleepers = 1; /* us - see -1 above */
- spin_unlock_irqrestore(&sem->wait.lock, flags);
-
- schedule();
-
- spin_lock_irqsave(&sem->wait.lock, flags);
- tsk->state = TASK_INTERRUPTIBLE;
- }
- remove_wait_queue_locked(&sem->wait, &wait);
- wake_up_locked(&sem->wait);
- spin_unlock_irqrestore(&sem->wait.lock, flags);
-
- tsk->state = TASK_RUNNING;
- return retval;
-}
-
-/*
- * Trylock failed - make sure we correct for
- * having decremented the count.
- *
- * We could have done the trylock with a
- * single "cmpxchg" without failure cases,
- * but then it wouldn't work on a 386.
- */
-asmlinkage int __down_trylock(struct semaphore * sem)
-{
- int sleepers;
- unsigned long flags;
-
- spin_lock_irqsave(&sem->wait.lock, flags);
- sleepers = sem->sleepers + 1;
- sem->sleepers = 0;
-
- /*
- * Add "everybody else" and us into it. They aren't
- * playing, because we own the spinlock in the
- * wait_queue_head.
- */
- if (!atomic_add_negative(sleepers, &sem->count)) {
- wake_up_locked(&sem->wait);
- }
-
- spin_unlock_irqrestore(&sem->wait.lock, flags);
- return 1;
-}
diff --git a/arch/m68k/kernel/Makefile b/arch/m68k/kernel/Makefile
index a806208..7a62a71 100644
--- a/arch/m68k/kernel/Makefile
+++ b/arch/m68k/kernel/Makefile
@@ -10,7 +10,7 @@ endif
extra-y += vmlinux.lds
obj-y := entry.o process.o traps.o ints.o signal.o ptrace.o module.o \
- sys_m68k.o time.o semaphore.o setup.o m68k_ksyms.o devres.o
+ sys_m68k.o time.o setup.o m68k_ksyms.o devres.o
devres-y = ../../../kernel/irq/devres.o
diff --git a/arch/m68k/kernel/m68k_ksyms.c b/arch/m68k/kernel/m68k_ksyms.c
index 6fc69c7..d900e77 100644
--- a/arch/m68k/kernel/m68k_ksyms.c
+++ b/arch/m68k/kernel/m68k_ksyms.c
@@ -1,5 +1,4 @@
#include <linux/module.h>
-#include <asm/semaphore.h>
asmlinkage long long __ashldi3 (long long, int);
asmlinkage long long __ashrdi3 (long long, int);
@@ -15,8 +14,3 @@ EXPORT_SYMBOL(__ashrdi3);
EXPORT_SYMBOL(__lshrdi3);
EXPORT_SYMBOL(__muldi3);
-EXPORT_SYMBOL(__down_failed);
-EXPORT_SYMBOL(__down_failed_interruptible);
-EXPORT_SYMBOL(__down_failed_trylock);
-EXPORT_SYMBOL(__up_wakeup);
-
diff --git a/arch/m68k/kernel/semaphore.c b/arch/m68k/kernel/semaphore.c
deleted file mode 100644
index d12cbbf..0000000
--- a/arch/m68k/kernel/semaphore.c
+++ /dev/null
@@ -1,132 +0,0 @@
-/*
- * Generic semaphore code. Buyer beware. Do your own
- * specific changes in <asm/semaphore-helper.h>
- */
-
-#include <linux/sched.h>
-#include <linux/init.h>
-#include <asm/semaphore-helper.h>
-
-#ifndef CONFIG_RMW_INSNS
-spinlock_t semaphore_wake_lock;
-#endif
-
-/*
- * Semaphores are implemented using a two-way counter:
- * The "count" variable is decremented for each process
- * that tries to sleep, while the "waking" variable is
- * incremented when the "up()" code goes to wake up waiting
- * processes.
- *
- * Notably, the inline "up()" and "down()" functions can
- * efficiently test if they need to do any extra work (up
- * needs to do something only if count was negative before
- * the increment operation.
- *
- * waking_non_zero() (from asm/semaphore.h) must execute
- * atomically.
- *
- * When __up() is called, the count was negative before
- * incrementing it, and we need to wake up somebody.
- *
- * This routine adds one to the count of processes that need to
- * wake up and exit. ALL waiting processes actually wake up but
- * only the one that gets to the "waking" field first will gate
- * through and acquire the semaphore. The others will go back
- * to sleep.
- *
- * Note that these functions are only called when there is
- * contention on the lock, and as such all this is the
- * "non-critical" part of the whole semaphore business. The
- * critical part is the inline stuff in <asm/semaphore.h>
- * where we want to avoid any extra jumps and calls.
- */
-void __up(struct semaphore *sem)
-{
- wake_one_more(sem);
- wake_up(&sem->wait);
-}
-
-/*
- * Perform the "down" function. Return zero for semaphore acquired,
- * return negative for signalled out of the function.
- *
- * If called from __down, the return is ignored and the wait loop is
- * not interruptible. This means that a task waiting on a semaphore
- * using "down()" cannot be killed until someone does an "up()" on
- * the semaphore.
- *
- * If called from __down_interruptible, the return value gets checked
- * upon return. If the return value is negative then the task continues
- * with the negative value in the return register (it can be tested by
- * the caller).
- *
- * Either form may be used in conjunction with "up()".
- *
- */
-
-
-#define DOWN_HEAD(task_state) \
- \
- \
- current->state = (task_state); \
- add_wait_queue(&sem->wait, &wait); \
- \
- /* \
- * Ok, we're set up. sem->count is known to be less than zero \
- * so we must wait. \
- * \
- * We can let go the lock for purposes of waiting. \
- * We re-acquire it after awaking so as to protect \
- * all semaphore operations. \
- * \
- * If "up()" is called before we call waking_non_zero() then \
- * we will catch it right away. If it is called later then \
- * we will have to go through a wakeup cycle to catch it. \
- * \
- * Multiple waiters contend for the semaphore lock to see \
- * who gets to gate through and who has to wait some more. \
- */ \
- for (;;) {
-
-#define DOWN_TAIL(task_state) \
- current->state = (task_state); \
- } \
- current->state = TASK_RUNNING; \
- remove_wait_queue(&sem->wait, &wait);
-
-void __sched __down(struct semaphore * sem)
-{
- DECLARE_WAITQUEUE(wait, current);
-
- DOWN_HEAD(TASK_UNINTERRUPTIBLE)
- if (waking_non_zero(sem))
- break;
- schedule();
- DOWN_TAIL(TASK_UNINTERRUPTIBLE)
-}
-
-int __sched __down_interruptible(struct semaphore * sem)
-{
- DECLARE_WAITQUEUE(wait, current);
- int ret = 0;
-
- DOWN_HEAD(TASK_INTERRUPTIBLE)
-
- ret = waking_non_zero_interruptible(sem, current);
- if (ret)
- {
- if (ret == 1)
- /* ret != 0 only if we get interrupted -arca */
- ret = 0;
- break;
- }
- schedule();
- DOWN_TAIL(TASK_INTERRUPTIBLE)
- return ret;
-}
-
-int __down_trylock(struct semaphore * sem)
-{
- return waking_non_zero_trylock(sem);
-}
diff --git a/arch/m68k/lib/Makefile b/arch/m68k/lib/Makefile
index 6bbf19f..a18af09 100644
--- a/arch/m68k/lib/Makefile
+++ b/arch/m68k/lib/Makefile
@@ -5,4 +5,4 @@
EXTRA_AFLAGS := -traditional
lib-y := ashldi3.o ashrdi3.o lshrdi3.o muldi3.o \
- checksum.o string.o semaphore.o uaccess.o
+ checksum.o string.o uaccess.o
diff --git a/arch/m68k/lib/semaphore.S b/arch/m68k/lib/semaphore.S
deleted file mode 100644
index 0215624..0000000
--- a/arch/m68k/lib/semaphore.S
+++ /dev/null
@@ -1,53 +0,0 @@
-/*
- * linux/arch/m68k/lib/semaphore.S
- *
- * Copyright (C) 1996 Linus Torvalds
- *
- * m68k version by Andreas Schwab
- */
-
-#include <linux/linkage.h>
-#include <asm/semaphore.h>
-
-/*
- * The semaphore operations have a special calling sequence that
- * allow us to do a simpler in-line version of them. These routines
- * need to convert that sequence back into the C sequence when
- * there is contention on the semaphore.
- */
-ENTRY(__down_failed)
- moveml %a0/%d0/%d1,-(%sp)
- movel %a1,-(%sp)
- jbsr __down
- movel (%sp)+,%a1
- moveml (%sp)+,%a0/%d0/%d1
- rts
-
-ENTRY(__down_failed_interruptible)
- movel %a0,-(%sp)
- movel %d1,-(%sp)
- movel %a1,-(%sp)
- jbsr __down_interruptible
- movel (%sp)+,%a1
- movel (%sp)+,%d1
- movel (%sp)+,%a0
- rts
-
-ENTRY(__down_failed_trylock)
- movel %a0,-(%sp)
- movel %d1,-(%sp)
- movel %a1,-(%sp)
- jbsr __down_trylock
- movel (%sp)+,%a1
- movel (%sp)+,%d1
- movel (%sp)+,%a0
- rts
-
-ENTRY(__up_wakeup)
- moveml %a0/%d0/%d1,-(%sp)
- movel %a1,-(%sp)
- jbsr __up
- movel (%sp)+,%a1
- moveml (%sp)+,%a0/%d0/%d1
- rts
-
diff --git a/arch/m68knommu/kernel/Makefile b/arch/m68knommu/kernel/Makefile
index 1524b39..f0eab3d 100644
--- a/arch/m68knommu/kernel/Makefile
+++ b/arch/m68knommu/kernel/Makefile
@@ -5,7 +5,7 @@
extra-y := vmlinux.lds
obj-y += dma.o entry.o init_task.o irq.o m68k_ksyms.o process.o ptrace.o \
- semaphore.o setup.o signal.o syscalltable.o sys_m68k.o time.o traps.o
+ setup.o signal.o syscalltable.o sys_m68k.o time.o traps.o
obj-$(CONFIG_MODULES) += module.o
obj-$(CONFIG_COMEMPCI) += comempci.o
diff --git a/arch/m68knommu/kernel/m68k_ksyms.c b/arch/m68knommu/kernel/m68k_ksyms.c
index 53fad14..39fe0a7 100644
--- a/arch/m68knommu/kernel/m68k_ksyms.c
+++ b/arch/m68knommu/kernel/m68k_ksyms.c
@@ -13,7 +13,6 @@
#include <asm/pgalloc.h>
#include <asm/irq.h>
#include <asm/io.h>
-#include <asm/semaphore.h>
#include <asm/checksum.h>
#include <asm/current.h>
@@ -39,11 +38,6 @@ EXPORT_SYMBOL(csum_partial_copy_nocheck);
EXPORT_SYMBOL(memcpy);
EXPORT_SYMBOL(memset);
-EXPORT_SYMBOL(__down_failed);
-EXPORT_SYMBOL(__down_failed_interruptible);
-EXPORT_SYMBOL(__down_failed_trylock);
-EXPORT_SYMBOL(__up_wakeup);
-
/*
* libgcc functions - functions that are used internally by the
* compiler... (prototypes are not correct though, but that
diff --git a/arch/m68knommu/kernel/semaphore.c b/arch/m68knommu/kernel/semaphore.c
deleted file mode 100644
index bce2bc7..0000000
--- a/arch/m68knommu/kernel/semaphore.c
+++ /dev/null
@@ -1,133 +0,0 @@
-/*
- * Generic semaphore code. Buyer beware. Do your own
- * specific changes in <asm/semaphore-helper.h>
- */
-
-#include <linux/sched.h>
-#include <linux/err.h>
-#include <linux/init.h>
-#include <asm/semaphore-helper.h>
-
-#ifndef CONFIG_RMW_INSNS
-spinlock_t semaphore_wake_lock;
-#endif
-
-/*
- * Semaphores are implemented using a two-way counter:
- * The "count" variable is decremented for each process
- * that tries to sleep, while the "waking" variable is
- * incremented when the "up()" code goes to wake up waiting
- * processes.
- *
- * Notably, the inline "up()" and "down()" functions can
- * efficiently test if they need to do any extra work (up
- * needs to do something only if count was negative before
- * the increment operation.
- *
- * waking_non_zero() (from asm/semaphore.h) must execute
- * atomically.
- *
- * When __up() is called, the count was negative before
- * incrementing it, and we need to wake up somebody.
- *
- * This routine adds one to the count of processes that need to
- * wake up and exit. ALL waiting processes actually wake up but
- * only the one that gets to the "waking" field first will gate
- * through and acquire the semaphore. The others will go back
- * to sleep.
- *
- * Note that these functions are only called when there is
- * contention on the lock, and as such all this is the
- * "non-critical" part of the whole semaphore business. The
- * critical part is the inline stuff in <asm/semaphore.h>
- * where we want to avoid any extra jumps and calls.
- */
-void __up(struct semaphore *sem)
-{
- wake_one_more(sem);
- wake_up(&sem->wait);
-}
-
-/*
- * Perform the "down" function. Return zero for semaphore acquired,
- * return negative for signalled out of the function.
- *
- * If called from __down, the return is ignored and the wait loop is
- * not interruptible. This means that a task waiting on a semaphore
- * using "down()" cannot be killed until someone does an "up()" on
- * the semaphore.
- *
- * If called from __down_interruptible, the return value gets checked
- * upon return. If the return value is negative then the task continues
- * with the negative value in the return register (it can be tested by
- * the caller).
- *
- * Either form may be used in conjunction with "up()".
- *
- */
-
-
-#define DOWN_HEAD(task_state) \
- \
- \
- current->state = (task_state); \
- add_wait_queue(&sem->wait, &wait); \
- \
- /* \
- * Ok, we're set up. sem->count is known to be less than zero \
- * so we must wait. \
- * \
- * We can let go the lock for purposes of waiting. \
- * We re-acquire it after awaking so as to protect \
- * all semaphore operations. \
- * \
- * If "up()" is called before we call waking_non_zero() then \
- * we will catch it right away. If it is called later then \
- * we will have to go through a wakeup cycle to catch it. \
- * \
- * Multiple waiters contend for the semaphore lock to see \
- * who gets to gate through and who has to wait some more. \
- */ \
- for (;;) {
-
-#define DOWN_TAIL(task_state) \
- current->state = (task_state); \
- } \
- current->state = TASK_RUNNING; \
- remove_wait_queue(&sem->wait, &wait);
-
-void __sched __down(struct semaphore * sem)
-{
- DECLARE_WAITQUEUE(wait, current);
-
- DOWN_HEAD(TASK_UNINTERRUPTIBLE)
- if (waking_non_zero(sem))
- break;
- schedule();
- DOWN_TAIL(TASK_UNINTERRUPTIBLE)
-}
-
-int __sched __down_interruptible(struct semaphore * sem)
-{
- DECLARE_WAITQUEUE(wait, current);
- int ret = 0;
-
- DOWN_HEAD(TASK_INTERRUPTIBLE)
-
- ret = waking_non_zero_interruptible(sem, current);
- if (ret)
- {
- if (ret == 1)
- /* ret != 0 only if we get interrupted -arca */
- ret = 0;
- break;
- }
- schedule();
- DOWN_TAIL(TASK_INTERRUPTIBLE)
- return ret;
-}
-
-int __down_trylock(struct semaphore * sem)
-{
- return waking_non_zero_trylock(sem);
-}
diff --git a/arch/m68knommu/lib/Makefile b/arch/m68knommu/lib/Makefile
index e051a79..d94d709 100644
--- a/arch/m68knommu/lib/Makefile
+++ b/arch/m68knommu/lib/Makefile
@@ -4,4 +4,4 @@
lib-y := ashldi3.o ashrdi3.o lshrdi3.o \
muldi3.o mulsi3.o divsi3.o udivsi3.o modsi3.o umodsi3.o \
- checksum.o semaphore.o memcpy.o memset.o delay.o
+ checksum.o memcpy.o memset.o delay.o
diff --git a/arch/m68knommu/lib/semaphore.S b/arch/m68knommu/lib/semaphore.S
deleted file mode 100644
index 87c7460..0000000
--- a/arch/m68knommu/lib/semaphore.S
+++ /dev/null
@@ -1,66 +0,0 @@
-/*
- * linux/arch/m68k/lib/semaphore.S
- *
- * Copyright (C) 1996 Linus Torvalds
- *
- * m68k version by Andreas Schwab
- *
- * MAR/1999 -- modified to support ColdFire (gerg@snapgear.com)
- */
-
-#include <linux/linkage.h>
-#include <asm/semaphore.h>
-
-/*
- * "down_failed" is called with the eventual return address
- * in %a0, and the address of the semaphore in %a1. We need
- * to increment the number of waiters on the semaphore,
- * call "__down()", and then eventually return to try again.
- */
-ENTRY(__down_failed)
-#ifdef CONFIG_COLDFIRE
- subl #12,%sp
- moveml %a0/%d0/%d1,(%sp)
-#else
- moveml %a0/%d0/%d1,-(%sp)
-#endif
- movel %a1,-(%sp)
- jbsr __down
- movel (%sp)+,%a1
- movel (%sp)+,%d0
- movel (%sp)+,%d1
- rts
-
-ENTRY(__down_failed_interruptible)
- movel %a0,-(%sp)
- movel %d1,-(%sp)
- movel %a1,-(%sp)
- jbsr __down_interruptible
- movel (%sp)+,%a1
- movel (%sp)+,%d1
- rts
-
-ENTRY(__up_wakeup)
-#ifdef CONFIG_COLDFIRE
- subl #12,%sp
- moveml %a0/%d0/%d1,(%sp)
-#else
- moveml %a0/%d0/%d1,-(%sp)
-#endif
- movel %a1,-(%sp)
- jbsr __up
- movel (%sp)+,%a1
- movel (%sp)+,%d0
- movel (%sp)+,%d1
- rts
-
-ENTRY(__down_failed_trylock)
- movel %a0,-(%sp)
- movel %d1,-(%sp)
- movel %a1,-(%sp)
- jbsr __down_trylock
- movel (%sp)+,%a1
- movel (%sp)+,%d1
- movel (%sp)+,%a0
- rts
-
diff --git a/arch/mips/kernel/Makefile b/arch/mips/kernel/Makefile
index ffa0836..6da8bbb 100644
--- a/arch/mips/kernel/Makefile
+++ b/arch/mips/kernel/Makefile
@@ -5,7 +5,7 @@
extra-y := head.o init_task.o vmlinux.lds
obj-y += cpu-probe.o branch.o entry.o genex.o irq.o process.o \
- ptrace.o reset.o semaphore.o setup.o signal.o syscall.o \
+ ptrace.o reset.o setup.o signal.o syscall.o \
time.o topology.o traps.o unaligned.o
obj-$(CONFIG_CEVT_BCM1480) += cevt-bcm1480.o
diff --git a/arch/mips/kernel/semaphore.c b/arch/mips/kernel/semaphore.c
deleted file mode 100644
index 1265358..0000000
--- a/arch/mips/kernel/semaphore.c
+++ /dev/null
@@ -1,168 +0,0 @@
-/*
- * MIPS-specific semaphore code.
- *
- * Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu>
- * Copyright (C) 2004 Ralf Baechle <ralf@linux-mips.org>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * April 2001 - Reworked by Paul Mackerras <paulus@samba.org>
- * to eliminate the SMP races in the old version between the updates
- * of `count' and `waking'. Now we use negative `count' values to
- * indicate that some process(es) are waiting for the semaphore.
- */
-
-#include <linux/module.h>
-#include <linux/sched.h>
-#include <linux/init.h>
-#include <asm/atomic.h>
-#include <asm/cpu-features.h>
-#include <asm/errno.h>
-#include <asm/semaphore.h>
-#include <asm/war.h>
-/*
- * Atomically update sem->count.
- * This does the equivalent of the following:
- *
- * old_count = sem->count;
- * tmp = MAX(old_count, 0) + incr;
- * sem->count = tmp;
- * return old_count;
- *
- * On machines without lld/scd we need a spinlock to make the manipulation of
- * sem->count and sem->waking atomic. Scalability isn't an issue because
- * this lock is used on UP only so it's just an empty variable.
- */
-static inline int __sem_update_count(struct semaphore *sem, int incr)
-{
- int old_count, tmp;
-
- if (cpu_has_llsc && R10000_LLSC_WAR) {
- __asm__ __volatile__(
- " .set mips3 \n"
- "1: ll %0, %2 # __sem_update_count \n"
- " sra %1, %0, 31 \n"
- " not %1 \n"
- " and %1, %0, %1 \n"
- " addu %1, %1, %3 \n"
- " sc %1, %2 \n"
- " beqzl %1, 1b \n"
- " .set mips0 \n"
- : "=&r" (old_count), "=&r" (tmp), "=m" (sem->count)
- : "r" (incr), "m" (sem->count));
- } else if (cpu_has_llsc) {
- __asm__ __volatile__(
- " .set mips3 \n"
- "1: ll %0, %2 # __sem_update_count \n"
- " sra %1, %0, 31 \n"
- " not %1 \n"
- " and %1, %0, %1 \n"
- " addu %1, %1, %3 \n"
- " sc %1, %2 \n"
- " beqz %1, 1b \n"
- " .set mips0 \n"
- : "=&r" (old_count), "=&r" (tmp), "=m" (sem->count)
- : "r" (incr), "m" (sem->count));
- } else {
- static DEFINE_SPINLOCK(semaphore_lock);
- unsigned long flags;
-
- spin_lock_irqsave(&semaphore_lock, flags);
- old_count = atomic_read(&sem->count);
- tmp = max_t(int, old_count, 0) + incr;
- atomic_set(&sem->count, tmp);
- spin_unlock_irqrestore(&semaphore_lock, flags);
- }
-
- return old_count;
-}
-
-void __up(struct semaphore *sem)
-{
- /*
- * Note that we incremented count in up() before we came here,
- * but that was ineffective since the result was <= 0, and
- * any negative value of count is equivalent to 0.
- * This ends up setting count to 1, unless count is now > 0
- * (i.e. because some other cpu has called up() in the meantime),
- * in which case we just increment count.
- */
- __sem_update_count(sem, 1);
- wake_up(&sem->wait);
-}
-
-EXPORT_SYMBOL(__up);
-
-/*
- * Note that when we come in to __down or __down_interruptible,
- * we have already decremented count, but that decrement was
- * ineffective since the result was < 0, and any negative value
- * of count is equivalent to 0.
- * Thus it is only when we decrement count from some value > 0
- * that we have actually got the semaphore.
- */
-void __sched __down(struct semaphore *sem)
-{
- struct task_struct *tsk = current;
- DECLARE_WAITQUEUE(wait, tsk);
-
- __set_task_state(tsk, TASK_UNINTERRUPTIBLE);
- add_wait_queue_exclusive(&sem->wait, &wait);
-
- /*
- * Try to get the semaphore. If the count is > 0, then we've
- * got the semaphore; we decrement count and exit the loop.
- * If the count is 0 or negative, we set it to -1, indicating
- * that we are asleep, and then sleep.
- */
- while (__sem_update_count(sem, -1) <= 0) {
- schedule();
- set_task_state(tsk, TASK_UNINTERRUPTIBLE);
- }
- remove_wait_queue(&sem->wait, &wait);
- __set_task_state(tsk, TASK_RUNNING);
-
- /*
- * If there are any more sleepers, wake one of them up so
- * that it can either get the semaphore, or set count to -1
- * indicating that there are still processes sleeping.
- */
- wake_up(&sem->wait);
-}
-
-EXPORT_SYMBOL(__down);
-
-int __sched __down_interruptible(struct semaphore * sem)
-{
- int retval = 0;
- struct task_struct *tsk = current;
- DECLARE_WAITQUEUE(wait, tsk);
-
- __set_task_state(tsk, TASK_INTERRUPTIBLE);
- add_wait_queue_exclusive(&sem->wait, &wait);
-
- while (__sem_update_count(sem, -1) <= 0) {
- if (signal_pending(current)) {
- /*
- * A signal is pending - give up trying.
- * Set sem->count to 0 if it is negative,
- * since we are no longer sleeping.
- */
- __sem_update_count(sem, 0);
- retval = -EINTR;
- break;
- }
- schedule();
- set_task_state(tsk, TASK_INTERRUPTIBLE);
- }
- remove_wait_queue(&sem->wait, &wait);
- __set_task_state(tsk, TASK_RUNNING);
-
- wake_up(&sem->wait);
- return retval;
-}
-
-EXPORT_SYMBOL(__down_interruptible);
diff --git a/arch/mn10300/kernel/Makefile b/arch/mn10300/kernel/Makefile
index ef07c95..23f2ab6 100644
--- a/arch/mn10300/kernel/Makefile
+++ b/arch/mn10300/kernel/Makefile
@@ -3,7 +3,7 @@
#
extra-y := head.o init_task.o vmlinux.lds
-obj-y := process.o semaphore.o signal.o entry.o fpu.o traps.o irq.o \
+obj-y := process.o signal.o entry.o fpu.o traps.o irq.o \
ptrace.o setup.o time.o sys_mn10300.o io.o kthread.o \
switch_to.o mn10300_ksyms.o kernel_execve.o
diff --git a/arch/mn10300/kernel/semaphore.c b/arch/mn10300/kernel/semaphore.c
deleted file mode 100644
index 9153c40..0000000
--- a/arch/mn10300/kernel/semaphore.c
+++ /dev/null
@@ -1,149 +0,0 @@
-/* MN10300 Semaphore implementation
- *
- * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
- */
-#include <linux/sched.h>
-#include <linux/module.h>
-#include <asm/semaphore.h>
-
-struct sem_waiter {
- struct list_head list;
- struct task_struct *task;
-};
-
-#if SEMAPHORE_DEBUG
-void semtrace(struct semaphore *sem, const char *str)
-{
- if (sem->debug)
- printk(KERN_DEBUG "[%d] %s({%d,%d})\n",
- current->pid,
- str,
- atomic_read(&sem->count),
- list_empty(&sem->wait_list) ? 0 : 1);
-}
-#else
-#define semtrace(SEM, STR) do { } while (0)
-#endif
-
-/*
- * wait for a token to be granted from a semaphore
- * - entered with lock held and interrupts disabled
- */
-void __down(struct semaphore *sem, unsigned long flags)
-{
- struct task_struct *tsk = current;
- struct sem_waiter waiter;
-
- semtrace(sem, "Entering __down");
-
- /* set up my own style of waitqueue */
- waiter.task = tsk;
- get_task_struct(tsk);
-
- list_add_tail(&waiter.list, &sem->wait_list);
-
- /* we don't need to touch the semaphore struct anymore */
- spin_unlock_irqrestore(&sem->wait_lock, flags);
-
- /* wait to be given the semaphore */
- set_task_state(tsk, TASK_UNINTERRUPTIBLE);
-
- for (;;) {
- if (!waiter.task)
- break;
- schedule();
- set_task_state(tsk, TASK_UNINTERRUPTIBLE);
- }
-
- tsk->state = TASK_RUNNING;
- semtrace(sem, "Leaving __down");
-}
-EXPORT_SYMBOL(__down);
-
-/*
- * interruptibly wait for a token to be granted from a semaphore
- * - entered with lock held and interrupts disabled
- */
-int __down_interruptible(struct semaphore *sem, unsigned long flags)
-{
- struct task_struct *tsk = current;
- struct sem_waiter waiter;
- int ret;
-
- semtrace(sem, "Entering __down_interruptible");
-
- /* set up my own style of waitqueue */
- waiter.task = tsk;
- get_task_struct(tsk);
-
- list_add_tail(&waiter.list, &sem->wait_list);
-
- /* we don't need to touch the semaphore struct anymore */
- set_task_state(tsk, TASK_INTERRUPTIBLE);
-
- spin_unlock_irqrestore(&sem->wait_lock, flags);
-
- /* wait to be given the semaphore */
- ret = 0;
- for (;;) {
- if (!waiter.task)
- break;
- if (unlikely(signal_pending(current)))
- goto interrupted;
- schedule();
- set_task_state(tsk, TASK_INTERRUPTIBLE);
- }
-
- out:
- tsk->state = TASK_RUNNING;
- semtrace(sem, "Leaving __down_interruptible");
- return ret;
-
- interrupted:
- spin_lock_irqsave(&sem->wait_lock, flags);
- list_del(&waiter.list);
- spin_unlock_irqrestore(&sem->wait_lock, flags);
-
- ret = 0;
- if (!waiter.task) {
- put_task_struct(current);
- ret = -EINTR;
- }
- goto out;
-}
-EXPORT_SYMBOL(__down_interruptible);
-
-/*
- * release a single token back to a semaphore
- * - entered with lock held and interrupts disabled
- */
-void __up(struct semaphore *sem)
-{
- struct task_struct *tsk;
- struct sem_waiter *waiter;
-
- semtrace(sem, "Entering __up");
-
- /* grant the token to the process at the front of the queue */
- waiter = list_entry(sem->wait_list.next, struct sem_waiter, list);
-
- /* We must be careful not to touch 'waiter' after we set ->task = NULL.
- * It is an allocated on the waiter's stack and may become invalid at
- * any time after that point (due to a wakeup from another source).
- */
- list_del_init(&waiter->list);
- tsk = waiter->task;
- smp_mb();
- waiter->task = NULL;
- wake_up_process(tsk);
- put_task_struct(tsk);
-
- semtrace(sem, "Leaving __up");
-}
-EXPORT_SYMBOL(__up);
diff --git a/arch/parisc/kernel/Makefile b/arch/parisc/kernel/Makefile
index 27827bc..1f6585a 100644
--- a/arch/parisc/kernel/Makefile
+++ b/arch/parisc/kernel/Makefile
@@ -9,7 +9,7 @@ AFLAGS_pacache.o := -traditional
obj-y := cache.o pacache.o setup.o traps.o time.o irq.o \
pa7300lc.o syscall.o entry.o sys_parisc.o firmware.o \
- ptrace.o hardware.o inventory.o drivers.o semaphore.o \
+ ptrace.o hardware.o inventory.o drivers.o \
signal.o hpmc.o real2.o parisc_ksyms.o unaligned.o \
process.o processor.o pdc_cons.o pdc_chassis.o unwind.o \
topology.o
diff --git a/arch/parisc/kernel/parisc_ksyms.c b/arch/parisc/kernel/parisc_ksyms.c
index 7aca704..5b7fc4a 100644
--- a/arch/parisc/kernel/parisc_ksyms.c
+++ b/arch/parisc/kernel/parisc_ksyms.c
@@ -69,11 +69,6 @@ EXPORT_SYMBOL(memcpy_toio);
EXPORT_SYMBOL(memcpy_fromio);
EXPORT_SYMBOL(memset_io);
-#include <asm/semaphore.h>
-EXPORT_SYMBOL(__up);
-EXPORT_SYMBOL(__down_interruptible);
-EXPORT_SYMBOL(__down);
-
extern void $$divI(void);
extern void $$divU(void);
extern void $$remI(void);
diff --git a/arch/parisc/kernel/semaphore.c b/arch/parisc/kernel/semaphore.c
deleted file mode 100644
index ee806bc..0000000
--- a/arch/parisc/kernel/semaphore.c
+++ /dev/null
@@ -1,102 +0,0 @@
-/*
- * Semaphore implementation Copyright (c) 2001 Matthew Wilcox, Hewlett-Packard
- */
-
-#include <linux/sched.h>
-#include <linux/spinlock.h>
-#include <linux/errno.h>
-#include <linux/init.h>
-
-/*
- * Semaphores are complex as we wish to avoid using two variables.
- * `count' has multiple roles, depending on its value. If it is positive
- * or zero, there are no waiters. The functions here will never be
- * called; see <asm/semaphore.h>
- *
- * When count is -1 it indicates there is at least one task waiting
- * for the semaphore.
- *
- * When count is less than that, there are '- count - 1' wakeups
- * pending. ie if it has value -3, there are 2 wakeups pending.
- *
- * Note that these functions are only called when there is contention
- * on the lock, and as such all this is the "non-critical" part of the
- * whole semaphore business. The critical part is the inline stuff in
- * <asm/semaphore.h> where we want to avoid any extra jumps and calls.
- */
-void __up(struct semaphore *sem)
-{
- sem->count--;
- wake_up(&sem->wait);
-}
-
-#define wakers(count) (-1 - count)
-
-#define DOWN_HEAD \
- int ret = 0; \
- DECLARE_WAITQUEUE(wait, current); \
- \
- /* Note that someone is waiting */ \
- if (sem->count == 0) \
- sem->count = -1; \
- \
- /* protected by the sentry still -- use unlocked version */ \
- wait.flags = WQ_FLAG_EXCLUSIVE; \
- __add_wait_queue_tail(&sem->wait, &wait); \
- lost_race: \
- spin_unlock_irq(&sem->sentry); \
-
-#define DOWN_TAIL \
- spin_lock_irq(&sem->sentry); \
- if (wakers(sem->count) == 0 && ret == 0) \
- goto lost_race; /* Someone stole our wakeup */ \
- __remove_wait_queue(&sem->wait, &wait); \
- current->state = TASK_RUNNING; \
- if (!waitqueue_active(&sem->wait) && (sem->count < 0)) \
- sem->count = wakers(sem->count);
-
-#define UPDATE_COUNT \
- sem->count += (sem->count < 0) ? 1 : - 1;
-
-
-void __sched __down(struct semaphore * sem)
-{
- DOWN_HEAD
-
- for(;;) {
- set_task_state(current, TASK_UNINTERRUPTIBLE);
- /* we can _read_ this without the sentry */
- if (sem->count != -1)
- break;
- schedule();
- }
-
- DOWN_TAIL
- UPDATE_COUNT
-}
-
-int __sched __down_interruptible(struct semaphore * sem)
-{
- DOWN_HEAD
-
- for(;;) {
- set_task_state(current, TASK_INTERRUPTIBLE);
- /* we can _read_ this without the sentry */
- if (sem->count != -1)
- break;
-
- if (signal_pending(current)) {
- ret = -EINTR;
- break;
- }
- schedule();
- }
-
- DOWN_TAIL
-
- if (!ret) {
- UPDATE_COUNT
- }
-
- return ret;
-}
diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index c1baf9d..b9dbfff 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -12,7 +12,7 @@ CFLAGS_prom_init.o += -fPIC
CFLAGS_btext.o += -fPIC
endif
-obj-y := semaphore.o cputable.o ptrace.o syscalls.o \
+obj-y := cputable.o ptrace.o syscalls.o \
irq.o align.o signal_32.o pmc.o vdso.o \
init_task.o process.o systbl.o idle.o \
signal.o
diff --git a/arch/powerpc/kernel/ppc_ksyms.c b/arch/powerpc/kernel/ppc_ksyms.c
index aa9ff35..21c1ca2 100644
--- a/arch/powerpc/kernel/ppc_ksyms.c
+++ b/arch/powerpc/kernel/ppc_ksyms.c
@@ -15,7 +15,6 @@
#include <linux/bitops.h>
#include <asm/page.h>
-#include <asm/semaphore.h>
#include <asm/processor.h>
#include <asm/cacheflush.h>
#include <asm/uaccess.h>
diff --git a/arch/powerpc/kernel/semaphore.c b/arch/powerpc/kernel/semaphore.c
deleted file mode 100644
index 2f8c3c9..0000000
--- a/arch/powerpc/kernel/semaphore.c
+++ /dev/null
@@ -1,135 +0,0 @@
-/*
- * PowerPC-specific semaphore code.
- *
- * Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * April 2001 - Reworked by Paul Mackerras <paulus@samba.org>
- * to eliminate the SMP races in the old version between the updates
- * of `count' and `waking'. Now we use negative `count' values to
- * indicate that some process(es) are waiting for the semaphore.
- */
-
-#include <linux/sched.h>
-#include <linux/init.h>
-#include <linux/module.h>
-
-#include <asm/atomic.h>
-#include <asm/semaphore.h>
-#include <asm/errno.h>
-
-/*
- * Atomically update sem->count.
- * This does the equivalent of the following:
- *
- * old_count = sem->count;
- * tmp = MAX(old_count, 0) + incr;
- * sem->count = tmp;
- * return old_count;
- */
-static inline int __sem_update_count(struct semaphore *sem, int incr)
-{
- int old_count, tmp;
-
- __asm__ __volatile__("\n"
-"1: lwarx %0,0,%3\n"
-" srawi %1,%0,31\n"
-" andc %1,%0,%1\n"
-" add %1,%1,%4\n"
- PPC405_ERR77(0,%3)
-" stwcx. %1,0,%3\n"
-" bne 1b"
- : "=&r" (old_count), "=&r" (tmp), "=m" (sem->count)
- : "r" (&sem->count), "r" (incr), "m" (sem->count)
- : "cc");
-
- return old_count;
-}
-
-void __up(struct semaphore *sem)
-{
- /*
- * Note that we incremented count in up() before we came here,
- * but that was ineffective since the result was <= 0, and
- * any negative value of count is equivalent to 0.
- * This ends up setting count to 1, unless count is now > 0
- * (i.e. because some other cpu has called up() in the meantime),
- * in which case we just increment count.
- */
- __sem_update_count(sem, 1);
- wake_up(&sem->wait);
-}
-EXPORT_SYMBOL(__up);
-
-/*
- * Note that when we come in to __down or __down_interruptible,
- * we have already decremented count, but that decrement was
- * ineffective since the result was < 0, and any negative value
- * of count is equivalent to 0.
- * Thus it is only when we decrement count from some value > 0
- * that we have actually got the semaphore.
- */
-void __sched __down(struct semaphore *sem)
-{
- struct task_struct *tsk = current;
- DECLARE_WAITQUEUE(wait, tsk);
-
- __set_task_state(tsk, TASK_UNINTERRUPTIBLE);
- add_wait_queue_exclusive(&sem->wait, &wait);
-
- /*
- * Try to get the semaphore. If the count is > 0, then we've
- * got the semaphore; we decrement count and exit the loop.
- * If the count is 0 or negative, we set it to -1, indicating
- * that we are asleep, and then sleep.
- */
- while (__sem_update_count(sem, -1) <= 0) {
- schedule();
- set_task_state(tsk, TASK_UNINTERRUPTIBLE);
- }
- remove_wait_queue(&sem->wait, &wait);
- __set_task_state(tsk, TASK_RUNNING);
-
- /*
- * If there are any more sleepers, wake one of them up so
- * that it can either get the semaphore, or set count to -1
- * indicating that there are still processes sleeping.
- */
- wake_up(&sem->wait);
-}
-EXPORT_SYMBOL(__down);
-
-int __sched __down_interruptible(struct semaphore * sem)
-{
- int retval = 0;
- struct task_struct *tsk = current;
- DECLARE_WAITQUEUE(wait, tsk);
-
- __set_task_state(tsk, TASK_INTERRUPTIBLE);
- add_wait_queue_exclusive(&sem->wait, &wait);
-
- while (__sem_update_count(sem, -1) <= 0) {
- if (signal_pending(current)) {
- /*
- * A signal is pending - give up trying.
- * Set sem->count to 0 if it is negative,
- * since we are no longer sleeping.
- */
- __sem_update_count(sem, 0);
- retval = -EINTR;
- break;
- }
- schedule();
- set_task_state(tsk, TASK_INTERRUPTIBLE);
- }
- remove_wait_queue(&sem->wait, &wait);
- __set_task_state(tsk, TASK_RUNNING);
-
- wake_up(&sem->wait);
- return retval;
-}
-EXPORT_SYMBOL(__down_interruptible);
diff --git a/arch/ppc/kernel/semaphore.c b/arch/ppc/kernel/semaphore.c
deleted file mode 100644
index 2fe429b..0000000
--- a/arch/ppc/kernel/semaphore.c
+++ /dev/null
@@ -1,131 +0,0 @@
-/*
- * PowerPC-specific semaphore code.
- *
- * Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * April 2001 - Reworked by Paul Mackerras <paulus@samba.org>
- * to eliminate the SMP races in the old version between the updates
- * of `count' and `waking'. Now we use negative `count' values to
- * indicate that some process(es) are waiting for the semaphore.
- */
-
-#include <linux/sched.h>
-#include <linux/init.h>
-#include <asm/atomic.h>
-#include <asm/semaphore.h>
-#include <asm/errno.h>
-
-/*
- * Atomically update sem->count.
- * This does the equivalent of the following:
- *
- * old_count = sem->count;
- * tmp = MAX(old_count, 0) + incr;
- * sem->count = tmp;
- * return old_count;
- */
-static inline int __sem_update_count(struct semaphore *sem, int incr)
-{
- int old_count, tmp;
-
- __asm__ __volatile__("\n"
-"1: lwarx %0,0,%3\n"
-" srawi %1,%0,31\n"
-" andc %1,%0,%1\n"
-" add %1,%1,%4\n"
- PPC405_ERR77(0,%3)
-" stwcx. %1,0,%3\n"
-" bne 1b"
- : "=&r" (old_count), "=&r" (tmp), "=m" (sem->count)
- : "r" (&sem->count), "r" (incr), "m" (sem->count)
- : "cc");
-
- return old_count;
-}
-
-void __up(struct semaphore *sem)
-{
- /*
- * Note that we incremented count in up() before we came here,
- * but that was ineffective since the result was <= 0, and
- * any negative value of count is equivalent to 0.
- * This ends up setting count to 1, unless count is now > 0
- * (i.e. because some other cpu has called up() in the meantime),
- * in which case we just increment count.
- */
- __sem_update_count(sem, 1);
- wake_up(&sem->wait);
-}
-
-/*
- * Note that when we come in to __down or __down_interruptible,
- * we have already decremented count, but that decrement was
- * ineffective since the result was < 0, and any negative value
- * of count is equivalent to 0.
- * Thus it is only when we decrement count from some value > 0
- * that we have actually got the semaphore.
- */
-void __sched __down(struct semaphore *sem)
-{
- struct task_struct *tsk = current;
- DECLARE_WAITQUEUE(wait, tsk);
-
- tsk->state = TASK_UNINTERRUPTIBLE;
- add_wait_queue_exclusive(&sem->wait, &wait);
- smp_wmb();
-
- /*
- * Try to get the semaphore. If the count is > 0, then we've
- * got the semaphore; we decrement count and exit the loop.
- * If the count is 0 or negative, we set it to -1, indicating
- * that we are asleep, and then sleep.
- */
- while (__sem_update_count(sem, -1) <= 0) {
- schedule();
- tsk->state = TASK_UNINTERRUPTIBLE;
- }
- remove_wait_queue(&sem->wait, &wait);
- tsk->state = TASK_RUNNING;
-
- /*
- * If there are any more sleepers, wake one of them up so
- * that it can either get the semaphore, or set count to -1
- * indicating that there are still processes sleeping.
- */
- wake_up(&sem->wait);
-}
-
-int __sched __down_interruptible(struct semaphore * sem)
-{
- int retval = 0;
- struct task_struct *tsk = current;
- DECLARE_WAITQUEUE(wait, tsk);
-
- tsk->state = TASK_INTERRUPTIBLE;
- add_wait_queue_exclusive(&sem->wait, &wait);
- smp_wmb();
-
- while (__sem_update_count(sem, -1) <= 0) {
- if (signal_pending(current)) {
- /*
- * A signal is pending - give up trying.
- * Set sem->count to 0 if it is negative,
- * since we are no longer sleeping.
- */
- __sem_update_count(sem, 0);
- retval = -EINTR;
- break;
- }
- schedule();
- tsk->state = TASK_INTERRUPTIBLE;
- }
- tsk->state = TASK_RUNNING;
- remove_wait_queue(&sem->wait, &wait);
- wake_up(&sem->wait);
- return retval;
-}
diff --git a/arch/s390/kernel/Makefile b/arch/s390/kernel/Makefile
index b3b650a..d426c11 100644
--- a/arch/s390/kernel/Makefile
+++ b/arch/s390/kernel/Makefile
@@ -6,7 +6,7 @@ EXTRA_AFLAGS := -traditional
obj-y := bitmap.o traps.o time.o process.o base.o early.o \
setup.o sys_s390.o ptrace.o signal.o cpcmd.o ebcdic.o \
- semaphore.o s390_ext.o debug.o irq.o ipl.o dis.o diag.o
+ s390_ext.o debug.o irq.o ipl.o dis.o diag.o
obj-y += $(if $(CONFIG_64BIT),entry64.o,entry.o)
obj-y += $(if $(CONFIG_64BIT),reipl64.o,reipl.o)
diff --git a/arch/s390/kernel/s390_ksyms.c b/arch/s390/kernel/s390_ksyms.c
index 7234c73..48238a1 100644
--- a/arch/s390/kernel/s390_ksyms.c
+++ b/arch/s390/kernel/s390_ksyms.c
@@ -27,13 +27,6 @@ EXPORT_SYMBOL(_zb_findmap);
EXPORT_SYMBOL(_sb_findmap);
/*
- * semaphore ops
- */
-EXPORT_SYMBOL(__up);
-EXPORT_SYMBOL(__down);
-EXPORT_SYMBOL(__down_interruptible);
-
-/*
* binfmt_elf loader
*/
extern int dump_fpu (struct pt_regs * regs, s390_fp_regs *fpregs);
diff --git a/arch/s390/kernel/semaphore.c b/arch/s390/kernel/semaphore.c
deleted file mode 100644
index 191303f..0000000
--- a/arch/s390/kernel/semaphore.c
+++ /dev/null
@@ -1,108 +0,0 @@
-/*
- * linux/arch/s390/kernel/semaphore.c
- *
- * S390 version
- * Copyright (C) 1998-2000 IBM Corporation
- * Author(s): Martin Schwidefsky
- *
- * Derived from "linux/arch/i386/kernel/semaphore.c
- * Copyright (C) 1999, Linus Torvalds
- *
- */
-#include <linux/sched.h>
-#include <linux/errno.h>
-#include <linux/init.h>
-
-#include <asm/semaphore.h>
-
-/*
- * Atomically update sem->count. Equivalent to:
- * old_val = sem->count.counter;
- * new_val = ((old_val >= 0) ? old_val : 0) + incr;
- * sem->count.counter = new_val;
- * return old_val;
- */
-static inline int __sem_update_count(struct semaphore *sem, int incr)
-{
- int old_val, new_val;
-
- asm volatile(
- " l %0,0(%3)\n"
- "0: ltr %1,%0\n"
- " jhe 1f\n"
- " lhi %1,0\n"
- "1: ar %1,%4\n"
- " cs %0,%1,0(%3)\n"
- " jl 0b\n"
- : "=&d" (old_val), "=&d" (new_val), "=m" (sem->count)
- : "a" (&sem->count), "d" (incr), "m" (sem->count)
- : "cc");
- return old_val;
-}
-
-/*
- * The inline function up() incremented count but the result
- * was <= 0. This indicates that some process is waiting on
- * the semaphore. The semaphore is free and we'll wake the
- * first sleeping process, so we set count to 1 unless some
- * other cpu has called up in the meantime in which case
- * we just increment count by 1.
- */
-void __up(struct semaphore *sem)
-{
- __sem_update_count(sem, 1);
- wake_up(&sem->wait);
-}
-
-/*
- * The inline function down() decremented count and the result
- * was < 0. The wait loop will atomically test and update the
- * semaphore counter following the rules:
- * count > 0: decrement count, wake up queue and exit.
- * count <= 0: set count to -1, go to sleep.
- */
-void __sched __down(struct semaphore * sem)
-{
- struct task_struct *tsk = current;
- DECLARE_WAITQUEUE(wait, tsk);
-
- __set_task_state(tsk, TASK_UNINTERRUPTIBLE);
- add_wait_queue_exclusive(&sem->wait, &wait);
- while (__sem_update_count(sem, -1) <= 0) {
- schedule();
- set_task_state(tsk, TASK_UNINTERRUPTIBLE);
- }
- remove_wait_queue(&sem->wait, &wait);
- __set_task_state(tsk, TASK_RUNNING);
- wake_up(&sem->wait);
-}
-
-/*
- * Same as __down() with an additional test for signals.
- * If a signal is pending the count is updated as follows:
- * count > 0: wake up queue and exit.
- * count <= 0: set count to 0, wake up queue and exit.
- */
-int __sched __down_interruptible(struct semaphore * sem)
-{
- int retval = 0;
- struct task_struct *tsk = current;
- DECLARE_WAITQUEUE(wait, tsk);
-
- __set_task_state(tsk, TASK_INTERRUPTIBLE);
- add_wait_queue_exclusive(&sem->wait, &wait);
- while (__sem_update_count(sem, -1) <= 0) {
- if (signal_pending(current)) {
- __sem_update_count(sem, 0);
- retval = -EINTR;
- break;
- }
- schedule();
- set_task_state(tsk, TASK_INTERRUPTIBLE);
- }
- remove_wait_queue(&sem->wait, &wait);
- __set_task_state(tsk, TASK_RUNNING);
- wake_up(&sem->wait);
- return retval;
-}
-
diff --git a/arch/sh/kernel/Makefile_32 b/arch/sh/kernel/Makefile_32
index 62bf373..4bbdce3 100644
--- a/arch/sh/kernel/Makefile_32
+++ b/arch/sh/kernel/Makefile_32
@@ -5,7 +5,7 @@
extra-y := head_32.o init_task.o vmlinux.lds
obj-y := debugtraps.o io.o io_generic.o irq.o machvec.o process_32.o \
- ptrace_32.o semaphore.o setup.o signal_32.o sys_sh.o sys_sh32.o \
+ ptrace_32.o setup.o signal_32.o sys_sh.o sys_sh32.o \
syscalls_32.o time_32.o topology.o traps.o traps_32.o
obj-y += cpu/ timers/
diff --git a/arch/sh/kernel/Makefile_64 b/arch/sh/kernel/Makefile_64
index e01283d..6edf53b 100644
--- a/arch/sh/kernel/Makefile_64
+++ b/arch/sh/kernel/Makefile_64
@@ -1,7 +1,7 @@
extra-y := head_64.o init_task.o vmlinux.lds
obj-y := debugtraps.o io.o io_generic.o irq.o machvec.o process_64.o \
- ptrace_64.o semaphore.o setup.o signal_64.o sys_sh.o sys_sh64.o \
+ ptrace_64.o setup.o signal_64.o sys_sh.o sys_sh64.o \
syscalls_64.o time_64.o topology.o traps.o traps_64.o
obj-y += cpu/ timers/
diff --git a/arch/sh/kernel/semaphore.c b/arch/sh/kernel/semaphore.c
deleted file mode 100644
index 184119e..0000000
--- a/arch/sh/kernel/semaphore.c
+++ /dev/null
@@ -1,139 +0,0 @@
-/*
- * Just taken from alpha implementation.
- * This can't work well, perhaps.
- */
-/*
- * Generic semaphore code. Buyer beware. Do your own
- * specific changes in <asm/semaphore-helper.h>
- */
-
-#include <linux/errno.h>
-#include <linux/sched.h>
-#include <linux/wait.h>
-#include <linux/init.h>
-#include <asm/semaphore.h>
-#include <asm/semaphore-helper.h>
-
-DEFINE_SPINLOCK(semaphore_wake_lock);
-
-/*
- * Semaphores are implemented using a two-way counter:
- * The "count" variable is decremented for each process
- * that tries to sleep, while the "waking" variable is
- * incremented when the "up()" code goes to wake up waiting
- * processes.
- *
- * Notably, the inline "up()" and "down()" functions can
- * efficiently test if they need to do any extra work (up
- * needs to do something only if count was negative before
- * the increment operation.
- *
- * waking_non_zero() (from asm/semaphore.h) must execute
- * atomically.
- *
- * When __up() is called, the count was negative before
- * incrementing it, and we need to wake up somebody.
- *
- * This routine adds one to the count of processes that need to
- * wake up and exit. ALL waiting processes actually wake up but
- * only the one that gets to the "waking" field first will gate
- * through and acquire the semaphore. The others will go back
- * to sleep.
- *
- * Note that these functions are only called when there is
- * contention on the lock, and as such all this is the
- * "non-critical" part of the whole semaphore business. The
- * critical part is the inline stuff in <asm/semaphore.h>
- * where we want to avoid any extra jumps and calls.
- */
-void __up(struct semaphore *sem)
-{
- wake_one_more(sem);
- wake_up(&sem->wait);
-}
-
-/*
- * Perform the "down" function. Return zero for semaphore acquired,
- * return negative for signalled out of the function.
- *
- * If called from __down, the return is ignored and the wait loop is
- * not interruptible. This means that a task waiting on a semaphore
- * using "down()" cannot be killed until someone does an "up()" on
- * the semaphore.
- *
- * If called from __down_interruptible, the return value gets checked
- * upon return. If the return value is negative then the task continues
- * with the negative value in the return register (it can be tested by
- * the caller).
- *
- * Either form may be used in conjunction with "up()".
- *
- */
-
-#define DOWN_VAR \
- struct task_struct *tsk = current; \
- wait_queue_t wait; \
- init_waitqueue_entry(&wait, tsk);
-
-#define DOWN_HEAD(task_state) \
- \
- \
- tsk->state = (task_state); \
- add_wait_queue(&sem->wait, &wait); \
- \
- /* \
- * Ok, we're set up. sem->count is known to be less than zero \
- * so we must wait. \
- * \
- * We can let go the lock for purposes of waiting. \
- * We re-acquire it after awaking so as to protect \
- * all semaphore operations. \
- * \
- * If "up()" is called before we call waking_non_zero() then \
- * we will catch it right away. If it is called later then \
- * we will have to go through a wakeup cycle to catch it. \
- * \
- * Multiple waiters contend for the semaphore lock to see \
- * who gets to gate through and who has to wait some more. \
- */ \
- for (;;) {
-
-#define DOWN_TAIL(task_state) \
- tsk->state = (task_state); \
- } \
- tsk->state = TASK_RUNNING; \
- remove_wait_queue(&sem->wait, &wait);
-
-void __sched __down(struct semaphore * sem)
-{
- DOWN_VAR
- DOWN_HEAD(TASK_UNINTERRUPTIBLE)
- if (waking_non_zero(sem))
- break;
- schedule();
- DOWN_TAIL(TASK_UNINTERRUPTIBLE)
-}
-
-int __sched __down_interruptible(struct semaphore * sem)
-{
- int ret = 0;
- DOWN_VAR
- DOWN_HEAD(TASK_INTERRUPTIBLE)
-
- ret = waking_non_zero_interruptible(sem, tsk);
- if (ret)
- {
- if (ret == 1)
- /* ret != 0 only if we get interrupted -arca */
- ret = 0;
- break;
- }
- schedule();
- DOWN_TAIL(TASK_INTERRUPTIBLE)
- return ret;
-}
-
-int __down_trylock(struct semaphore * sem)
-{
- return waking_non_zero_trylock(sem);
-}
diff --git a/arch/sh/kernel/sh_ksyms_32.c b/arch/sh/kernel/sh_ksyms_32.c
index e1a6de9..c011ad0 100644
--- a/arch/sh/kernel/sh_ksyms_32.c
+++ b/arch/sh/kernel/sh_ksyms_32.c
@@ -9,7 +9,6 @@
#include <linux/pci.h>
#include <linux/irq.h>
#include <asm/sections.h>
-#include <asm/semaphore.h>
#include <asm/processor.h>
#include <asm/uaccess.h>
#include <asm/checksum.h>
@@ -48,12 +47,6 @@ EXPORT_SYMBOL(__copy_user);
EXPORT_SYMBOL(get_vm_area);
#endif
-/* semaphore exports */
-EXPORT_SYMBOL(__up);
-EXPORT_SYMBOL(__down);
-EXPORT_SYMBOL(__down_interruptible);
-EXPORT_SYMBOL(__down_trylock);
-
EXPORT_SYMBOL(__udelay);
EXPORT_SYMBOL(__ndelay);
EXPORT_SYMBOL(__const_udelay);
diff --git a/arch/sh/kernel/sh_ksyms_64.c b/arch/sh/kernel/sh_ksyms_64.c
index 8004c38..c1a3555 100644
--- a/arch/sh/kernel/sh_ksyms_64.c
+++ b/arch/sh/kernel/sh_ksyms_64.c
@@ -16,7 +16,6 @@
#include <linux/in6.h>
#include <linux/interrupt.h>
#include <linux/screen_info.h>
-#include <asm/semaphore.h>
#include <asm/processor.h>
#include <asm/uaccess.h>
#include <asm/checksum.h>
@@ -37,9 +36,6 @@ EXPORT_SYMBOL(csum_partial_copy_nocheck);
EXPORT_SYMBOL(screen_info);
#endif
-EXPORT_SYMBOL(__down);
-EXPORT_SYMBOL(__down_trylock);
-EXPORT_SYMBOL(__up);
EXPORT_SYMBOL(__put_user_asm_l);
EXPORT_SYMBOL(__get_user_asm_l);
EXPORT_SYMBOL(__copy_user);
diff --git a/arch/sparc/kernel/Makefile b/arch/sparc/kernel/Makefile
index e795f28..9b16cd3 100644
--- a/arch/sparc/kernel/Makefile
+++ b/arch/sparc/kernel/Makefile
@@ -12,7 +12,7 @@ obj-y := entry.o wof.o wuf.o etrap.o rtrap.o traps.o $(IRQ_OBJS) \
sys_sparc.o sunos_asm.o systbls.o \
time.o windows.o cpu.o devices.o sclow.o \
tadpole.o tick14.o ptrace.o sys_solaris.o \
- unaligned.o muldiv.o semaphore.o prom.o of_device.o devres.o
+ unaligned.o muldiv.o prom.o of_device.o devres.o
devres-y = ../../../kernel/irq/devres.o
diff --git a/arch/sparc/kernel/semaphore.c b/arch/sparc/kernel/semaphore.c
deleted file mode 100644
index 0c37c1a..0000000
--- a/arch/sparc/kernel/semaphore.c
+++ /dev/null
@@ -1,155 +0,0 @@
-/* $Id: semaphore.c,v 1.7 2001/04/18 21:06:05 davem Exp $ */
-
-/* sparc32 semaphore implementation, based on i386 version */
-
-#include <linux/sched.h>
-#include <linux/errno.h>
-#include <linux/init.h>
-
-#include <asm/semaphore.h>
-
-/*
- * Semaphores are implemented using a two-way counter:
- * The "count" variable is decremented for each process
- * that tries to acquire the semaphore, while the "sleeping"
- * variable is a count of such acquires.
- *
- * Notably, the inline "up()" and "down()" functions can
- * efficiently test if they need to do any extra work (up
- * needs to do something only if count was negative before
- * the increment operation.
- *
- * "sleeping" and the contention routine ordering is
- * protected by the semaphore spinlock.
- *
- * Note that these functions are only called when there is
- * contention on the lock, and as such all this is the
- * "non-critical" part of the whole semaphore business. The
- * critical part is the inline stuff in <asm/semaphore.h>
- * where we want to avoid any extra jumps and calls.
- */
-
-/*
- * Logic:
- * - only on a boundary condition do we need to care. When we go
- * from a negative count to a non-negative, we wake people up.
- * - when we go from a non-negative count to a negative do we
- * (a) synchronize with the "sleeper" count and (b) make sure
- * that we're on the wakeup list before we synchronize so that
- * we cannot lose wakeup events.
- */
-
-void __up(struct semaphore *sem)
-{
- wake_up(&sem->wait);
-}
-
-static DEFINE_SPINLOCK(semaphore_lock);
-
-void __sched __down(struct semaphore * sem)
-{
- struct task_struct *tsk = current;
- DECLARE_WAITQUEUE(wait, tsk);
- tsk->state = TASK_UNINTERRUPTIBLE;
- add_wait_queue_exclusive(&sem->wait, &wait);
-
- spin_lock_irq(&semaphore_lock);
- sem->sleepers++;
- for (;;) {
- int sleepers = sem->sleepers;
-
- /*
- * Add "everybody else" into it. They aren't
- * playing, because we own the spinlock.
- */
- if (!atomic24_add_negative(sleepers - 1, &sem->count)) {
- sem->sleepers = 0;
- break;
- }
- sem->sleepers = 1; /* us - see -1 above */
- spin_unlock_irq(&semaphore_lock);
-
- schedule();
- tsk->state = TASK_UNINTERRUPTIBLE;
- spin_lock_irq(&semaphore_lock);
- }
- spin_unlock_irq(&semaphore_lock);
- remove_wait_queue(&sem->wait, &wait);
- tsk->state = TASK_RUNNING;
- wake_up(&sem->wait);
-}
-
-int __sched __down_interruptible(struct semaphore * sem)
-{
- int retval = 0;
- struct task_struct *tsk = current;
- DECLARE_WAITQUEUE(wait, tsk);
- tsk->state = TASK_INTERRUPTIBLE;
- add_wait_queue_exclusive(&sem->wait, &wait);
-
- spin_lock_irq(&semaphore_lock);
- sem->sleepers ++;
- for (;;) {
- int sleepers = sem->sleepers;
-
- /*
- * With signals pending, this turns into
- * the trylock failure case - we won't be
- * sleeping, and we* can't get the lock as
- * it has contention. Just correct the count
- * and exit.
- */
- if (signal_pending(current)) {
- retval = -EINTR;
- sem->sleepers = 0;
- atomic24_add(sleepers, &sem->count);
- break;
- }
-
- /*
- * Add "everybody else" into it. They aren't
- * playing, because we own the spinlock. The
- * "-1" is because we're still hoping to get
- * the lock.
- */
- if (!atomic24_add_negative(sleepers - 1, &sem->count)) {
- sem->sleepers = 0;
- break;
- }
- sem->sleepers = 1; /* us - see -1 above */
- spin_unlock_irq(&semaphore_lock);
-
- schedule();
- tsk->state = TASK_INTERRUPTIBLE;
- spin_lock_irq(&semaphore_lock);
- }
- spin_unlock_irq(&semaphore_lock);
- tsk->state = TASK_RUNNING;
- remove_wait_queue(&sem->wait, &wait);
- wake_up(&sem->wait);
- return retval;
-}
-
-/*
- * Trylock failed - make sure we correct for
- * having decremented the count.
- */
-int __down_trylock(struct semaphore * sem)
-{
- int sleepers;
- unsigned long flags;
-
- spin_lock_irqsave(&semaphore_lock, flags);
- sleepers = sem->sleepers + 1;
- sem->sleepers = 0;
-
- /*
- * Add "everybody else" and us into it. They aren't
- * playing, because we own the spinlock.
- */
- if (!atomic24_add_negative(sleepers, &sem->count))
- wake_up(&sem->wait);
-
- spin_unlock_irqrestore(&semaphore_lock, flags);
- return 1;
-}
diff --git a/arch/sparc/kernel/sparc_ksyms.c b/arch/sparc/kernel/sparc_ksyms.c
index c1025e5..97b1de0 100644
--- a/arch/sparc/kernel/sparc_ksyms.c
+++ b/arch/sparc/kernel/sparc_ksyms.c
@@ -107,11 +107,6 @@ EXPORT_SYMBOL(___rw_read_try);
EXPORT_SYMBOL(___rw_read_exit);
EXPORT_SYMBOL(___rw_write_enter);
#endif
-/* semaphores */
-EXPORT_SYMBOL(__up);
-EXPORT_SYMBOL(__down);
-EXPORT_SYMBOL(__down_trylock);
-EXPORT_SYMBOL(__down_interruptible);
EXPORT_SYMBOL(sparc_valid_addr_bitmap);
EXPORT_SYMBOL(phys_base);
diff --git a/arch/sparc64/kernel/Makefile b/arch/sparc64/kernel/Makefile
index 1bf5b18..459462e 100644
--- a/arch/sparc64/kernel/Makefile
+++ b/arch/sparc64/kernel/Makefile
@@ -10,7 +10,7 @@ extra-y := head.o init_task.o vmlinux.lds
obj-y := process.o setup.o cpu.o idprom.o \
traps.o auxio.o una_asm.o sysfs.o iommu.o \
irq.o ptrace.o time.o sys_sparc.o signal.o \
- unaligned.o central.o pci.o starfire.o semaphore.o \
+ unaligned.o central.o pci.o starfire.o \
power.o sbus.o sparc64_ksyms.o chmc.o \
visemul.o prom.o of_device.o hvapi.o sstate.o mdesc.o
diff --git a/arch/sparc64/kernel/semaphore.c b/arch/sparc64/kernel/semaphore.c
deleted file mode 100644
index 9974a68..0000000
--- a/arch/sparc64/kernel/semaphore.c
+++ /dev/null
@@ -1,254 +0,0 @@
-/* semaphore.c: Sparc64 semaphore implementation.
- *
- * This is basically the PPC semaphore scheme ported to use
- * the sparc64 atomic instructions, so see the PPC code for
- * credits.
- */
-
-#include <linux/sched.h>
-#include <linux/errno.h>
-#include <linux/init.h>
-
-/*
- * Atomically update sem->count.
- * This does the equivalent of the following:
- *
- * old_count = sem->count;
- * tmp = MAX(old_count, 0) + incr;
- * sem->count = tmp;
- * return old_count;
- */
-static inline int __sem_update_count(struct semaphore *sem, int incr)
-{
- int old_count, tmp;
-
- __asm__ __volatile__("\n"
-" ! __sem_update_count old_count(%0) tmp(%1) incr(%4) &sem->count(%3)\n"
-"1: ldsw [%3], %0\n"
-" mov %0, %1\n"
-" cmp %0, 0\n"
-" movl %%icc, 0, %1\n"
-" add %1, %4, %1\n"
-" cas [%3], %0, %1\n"
-" cmp %0, %1\n"
-" membar #StoreLoad | #StoreStore\n"
-" bne,pn %%icc, 1b\n"
-" nop\n"
- : "=&r" (old_count), "=&r" (tmp), "=m" (sem->count)
- : "r" (&sem->count), "r" (incr), "m" (sem->count)
- : "cc");
-
- return old_count;
-}
-
-static void __up(struct semaphore *sem)
-{
- __sem_update_count(sem, 1);
- wake_up(&sem->wait);
-}
-
-void up(struct semaphore *sem)
-{
- /* This atomically does:
- * old_val = sem->count;
- * new_val = sem->count + 1;
- * sem->count = new_val;
- * if (old_val < 0)
- * __up(sem);
- *
- * The (old_val < 0) test is equivalent to
- * the more straightforward (new_val <= 0),
- * but it is easier to test the former because
- * of how the CAS instruction works.
- */
-
- __asm__ __volatile__("\n"
-" ! up sem(%0)\n"
-" membar #StoreLoad | #LoadLoad\n"
-"1: lduw [%0], %%g1\n"
-" add %%g1, 1, %%g7\n"
-" cas [%0], %%g1, %%g7\n"
-" cmp %%g1, %%g7\n"
-" bne,pn %%icc, 1b\n"
-" addcc %%g7, 1, %%g0\n"
-" membar #StoreLoad | #StoreStore\n"
-" ble,pn %%icc, 3f\n"
-" nop\n"
-"2:\n"
-" .subsection 2\n"
-"3: mov %0, %%g1\n"
-" save %%sp, -160, %%sp\n"
-" call %1\n"
-" mov %%g1, %%o0\n"
-" ba,pt %%xcc, 2b\n"
-" restore\n"
-" .previous\n"
- : : "r" (sem), "i" (__up)
- : "g1", "g2", "g3", "g7", "memory", "cc");
-}
-
-static void __sched __down(struct semaphore * sem)
-{
- struct task_struct *tsk = current;
- DECLARE_WAITQUEUE(wait, tsk);
-
- tsk->state = TASK_UNINTERRUPTIBLE;
- add_wait_queue_exclusive(&sem->wait, &wait);
-
- while (__sem_update_count(sem, -1) <= 0) {
- schedule();
- tsk->state = TASK_UNINTERRUPTIBLE;
- }
- remove_wait_queue(&sem->wait, &wait);
- tsk->state = TASK_RUNNING;
-
- wake_up(&sem->wait);
-}
-
-void __sched down(struct semaphore *sem)
-{
- might_sleep();
- /* This atomically does:
- * old_val = sem->count;
- * new_val = sem->count - 1;
- * sem->count = new_val;
- * if (old_val < 1)
- * __down(sem);
- *
- * The (old_val < 1) test is equivalent to
- * the more straightforward (new_val < 0),
- * but it is easier to test the former because
- * of how the CAS instruction works.
- */
-
- __asm__ __volatile__("\n"
-" ! down sem(%0)\n"
-"1: lduw [%0], %%g1\n"
-" sub %%g1, 1, %%g7\n"
-" cas [%0], %%g1, %%g7\n"
-" cmp %%g1, %%g7\n"
-" bne,pn %%icc, 1b\n"
-" cmp %%g7, 1\n"
-" membar #StoreLoad | #StoreStore\n"
-" bl,pn %%icc, 3f\n"
-" nop\n"
-"2:\n"
-" .subsection 2\n"
-"3: mov %0, %%g1\n"
-" save %%sp, -160, %%sp\n"
-" call %1\n"
-" mov %%g1, %%o0\n"
-" ba,pt %%xcc, 2b\n"
-" restore\n"
-" .previous\n"
- : : "r" (sem), "i" (__down)
- : "g1", "g2", "g3", "g7", "memory", "cc");
-}
-
-int down_trylock(struct semaphore *sem)
-{
- int ret;
-
- /* This atomically does:
- * old_val = sem->count;
- * new_val = sem->count - 1;
- * if (old_val < 1) {
- * ret = 1;
- * } else {
- * sem->count = new_val;
- * ret = 0;
- * }
- *
- * The (old_val < 1) test is equivalent to
- * the more straightforward (new_val < 0),
- * but it is easier to test the former because
- * of how the CAS instruction works.
- */
-
- __asm__ __volatile__("\n"
-" ! down_trylock sem(%1) ret(%0)\n"
-"1: lduw [%1], %%g1\n"
-" sub %%g1, 1, %%g7\n"
-" cmp %%g1, 1\n"
-" bl,pn %%icc, 2f\n"
-" mov 1, %0\n"
-" cas [%1], %%g1, %%g7\n"
-" cmp %%g1, %%g7\n"
-" bne,pn %%icc, 1b\n"
-" mov 0, %0\n"
-" membar #StoreLoad | #StoreStore\n"
-"2:\n"
- : "=&r" (ret)
- : "r" (sem)
- : "g1", "g7", "memory", "cc");
-
- return ret;
-}
-
-static int __sched __down_interruptible(struct semaphore * sem)
-{
- int retval = 0;
- struct task_struct *tsk = current;
- DECLARE_WAITQUEUE(wait, tsk);
-
- tsk->state = TASK_INTERRUPTIBLE;
- add_wait_queue_exclusive(&sem->wait, &wait);
-
- while (__sem_update_count(sem, -1) <= 0) {
- if (signal_pending(current)) {
- __sem_update_count(sem, 0);
- retval = -EINTR;
- break;
- }
- schedule();
- tsk->state = TASK_INTERRUPTIBLE;
- }
- tsk->state = TASK_RUNNING;
- remove_wait_queue(&sem->wait, &wait);
- wake_up(&sem->wait);
- return retval;
-}
-
-int __sched down_interruptible(struct semaphore *sem)
-{
- int ret = 0;
-
- might_sleep();
- /* This atomically does:
- * old_val = sem->count;
- * new_val = sem->count - 1;
- * sem->count = new_val;
- * if (old_val < 1)
- * ret = __down_interruptible(sem);
- *
- * The (old_val < 1) test is equivalent to
- * the more straightforward (new_val < 0),
- * but it is easier to test the former because
- * of how the CAS instruction works.
- */
-
- __asm__ __volatile__("\n"
-" ! down_interruptible sem(%2) ret(%0)\n"
-"1: lduw [%2], %%g1\n"
-" sub %%g1, 1, %%g7\n"
-" cas [%2], %%g1, %%g7\n"
-" cmp %%g1, %%g7\n"
-" bne,pn %%icc, 1b\n"
-" cmp %%g7, 1\n"
-" membar #StoreLoad | #StoreStore\n"
-" bl,pn %%icc, 3f\n"
-" nop\n"
-"2:\n"
-" .subsection 2\n"
-"3: mov %2, %%g1\n"
-" save %%sp, -160, %%sp\n"
-" call %3\n"
-" mov %%g1, %%o0\n"
-" ba,pt %%xcc, 2b\n"
-" restore\n"
-" .previous\n"
- : "=r" (ret)
- : "0" (ret), "r" (sem), "i" (__down_interruptible)
- : "g1", "g2", "g3", "g7", "memory", "cc");
- return ret;
-}
diff --git a/arch/sparc64/kernel/sparc64_ksyms.c b/arch/sparc64/kernel/sparc64_ksyms.c
index 51fa773..051b8d9 100644
--- a/arch/sparc64/kernel/sparc64_ksyms.c
+++ b/arch/sparc64/kernel/sparc64_ksyms.c
@@ -130,12 +130,6 @@ EXPORT_SYMBOL(_mcount);
EXPORT_SYMBOL(sparc64_get_clock_tick);
-/* semaphores */
-EXPORT_SYMBOL(down);
-EXPORT_SYMBOL(down_trylock);
-EXPORT_SYMBOL(down_interruptible);
-EXPORT_SYMBOL(up);
-
/* RW semaphores */
EXPORT_SYMBOL(__down_read);
EXPORT_SYMBOL(__down_read_trylock);
diff --git a/arch/um/Kconfig.i386 b/arch/um/Kconfig.i386
index 3cd8a04..e28b66c 100644
--- a/arch/um/Kconfig.i386
+++ b/arch/um/Kconfig.i386
@@ -19,9 +19,42 @@ config 64BIT
bool
default n
-config SEMAPHORE_SLEEPERS
- bool
- default y
+choice
+ prompt "Host memory split"
+ default HOST_VMSPLIT_3G
+ help
+ This is needed when the host kernel on which you run has a non-default
+ (like 2G/2G) memory split, instead of the customary 3G/1G. If you did
+ not recompile your own kernel but use the default distro's one, you can
+ safely accept the "Default split" option.
+
+ It can be enabled on recent (>=2.6.16-rc2) vanilla kernels via
+ CONFIG_VM_SPLIT_*, or on previous kernels with special patches (-ck
+ patchset by Con Kolivas, or other ones) - option names match closely the
+ host CONFIG_VM_SPLIT_* ones.
+
+ A lower setting (where 1G/3G is lowest and 3G/1G is higher) will
+ tolerate even more "normal" host kernels, but an higher setting will be
+ stricter.
+
+ So, if you do not know what to do here, say 'Default split'.
+
+config HOST_VMSPLIT_3G
+ bool "Default split (3G/1G user/kernel host split)"
+config HOST_VMSPLIT_3G_OPT
+ bool "3G/1G user/kernel host split (for full 1G low memory)"
+config HOST_VMSPLIT_2G
+ bool "2G/2G user/kernel host split"
+config HOST_VMSPLIT_1G
+ bool "1G/3G user/kernel host split"
+endchoice
+
+config TOP_ADDR
+ hex
+ default 0xB0000000 if HOST_VMSPLIT_3G_OPT
+ default 0x78000000 if HOST_VMSPLIT_2G
+ default 0x40000000 if HOST_VMSPLIT_1G
+ default 0xC0000000
config 3_LEVEL_PGTABLES
bool "Three-level pagetables (EXPERIMENTAL)"
diff --git a/arch/um/Kconfig.x86_64 b/arch/um/Kconfig.x86_64
index 6533b34..9961e52 100644
--- a/arch/um/Kconfig.x86_64
+++ b/arch/um/Kconfig.x86_64
@@ -11,9 +11,9 @@ config RWSEM_GENERIC_SPINLOCK
bool
default y
-config SEMAPHORE_SLEEPERS
- bool
- default y
+config TOP_ADDR
+ hex
+ default 0x7fc0000000
config 3_LEVEL_PGTABLES
bool
diff --git a/arch/um/sys-i386/ksyms.c b/arch/um/sys-i386/ksyms.c
index 2a1eac1..bfbefd3 100644
--- a/arch/um/sys-i386/ksyms.c
+++ b/arch/um/sys-i386/ksyms.c
@@ -1,17 +1,5 @@
#include "linux/module.h"
-#include "linux/in6.h"
-#include "linux/rwsem.h"
-#include "asm/byteorder.h"
-#include "asm/delay.h"
-#include "asm/semaphore.h"
-#include "asm/uaccess.h"
#include "asm/checksum.h"
-#include "asm/errno.h"
-
-EXPORT_SYMBOL(__down_failed);
-EXPORT_SYMBOL(__down_failed_interruptible);
-EXPORT_SYMBOL(__down_failed_trylock);
-EXPORT_SYMBOL(__up_wakeup);
/* Networking helper routines. */
EXPORT_SYMBOL(csum_partial);
diff --git a/arch/um/sys-ppc/Makefile b/arch/um/sys-ppc/Makefile
index 0890152..b8bc844 100644
--- a/arch/um/sys-ppc/Makefile
+++ b/arch/um/sys-ppc/Makefile
@@ -3,7 +3,7 @@ OBJ = built-in.o
.S.o:
$(CC) $(KBUILD_AFLAGS) -D__ASSEMBLY__ -D__UM_PPC__ -c $< -o $*.o
-OBJS = ptrace.o sigcontext.o semaphore.o checksum.o miscthings.o misc.o \
+OBJS = ptrace.o sigcontext.o checksum.o miscthings.o misc.o \
ptrace_user.o sysrq.o
EXTRA_AFLAGS := -DCONFIG_PPC32 -I. -I$(srctree)/arch/ppc/kernel
@@ -20,10 +20,6 @@ ptrace_user.o: ptrace_user.c
sigcontext.o: sigcontext.c
$(CC) $(USER_CFLAGS) $(EXTRA_CFLAGS) -c -o $@ $<
-semaphore.c:
- rm -f $@
- ln -s $(srctree)/arch/ppc/kernel/$@ $@
-
checksum.S:
rm -f $@
ln -s $(srctree)/arch/ppc/lib/$@ $@
@@ -66,4 +62,4 @@ misc.o: misc.S ppc_defs.h
$(CC) $(EXTRA_AFLAGS) $(KBUILD_AFLAGS) -D__ASSEMBLY__ -D__UM_PPC__ -c $< -o $*.o
rm -f asm
-clean-files := $(OBJS) ppc_defs.h checksum.S semaphore.c mk_defs.c
+clean-files := $(OBJS) ppc_defs.h checksum.S mk_defs.c
diff --git a/arch/um/sys-x86_64/ksyms.c b/arch/um/sys-x86_64/ksyms.c
index 12c5936..4d7d1a8 100644
--- a/arch/um/sys-x86_64/ksyms.c
+++ b/arch/um/sys-x86_64/ksyms.c
@@ -1,16 +1,5 @@
#include "linux/module.h"
-#include "linux/in6.h"
-#include "linux/rwsem.h"
-#include "asm/byteorder.h"
-#include "asm/semaphore.h"
-#include "asm/uaccess.h"
-#include "asm/checksum.h"
-#include "asm/errno.h"
-
-EXPORT_SYMBOL(__down_failed);
-EXPORT_SYMBOL(__down_failed_interruptible);
-EXPORT_SYMBOL(__down_failed_trylock);
-EXPORT_SYMBOL(__up_wakeup);
+#include "asm/string.h"
/*XXX: we need them because they would be exported by x86_64 */
EXPORT_SYMBOL(__memcpy);
diff --git a/arch/v850/kernel/Makefile b/arch/v850/kernel/Makefile
index 3930482..da5889c 100644
--- a/arch/v850/kernel/Makefile
+++ b/arch/v850/kernel/Makefile
@@ -11,7 +11,7 @@
extra-y := head.o init_task.o vmlinux.lds
-obj-y += intv.o entry.o process.o syscalls.o time.o semaphore.o setup.o \
+obj-y += intv.o entry.o process.o syscalls.o time.o setup.o \
signal.o irq.o mach.o ptrace.o bug.o
obj-$(CONFIG_MODULES) += module.o v850_ksyms.o
# chip-specific code
diff --git a/arch/v850/kernel/semaphore.c b/arch/v850/kernel/semaphore.c
deleted file mode 100644
index fc89fd6..0000000
--- a/arch/v850/kernel/semaphore.c
+++ /dev/null
@@ -1,166 +0,0 @@
-/*
- * arch/v850/kernel/semaphore.c -- Semaphore support
- *
- * Copyright (C) 1998-2000 IBM Corporation
- * Copyright (C) 1999 Linus Torvalds
- *
- * This file is subject to the terms and conditions of the GNU General
- * Public License. See the file COPYING in the main directory of this
- * archive for more details.
- *
- * This file is a copy of the s390 version, arch/s390/kernel/semaphore.c
- * Author(s): Martin Schwidefsky
- * which was derived from the i386 version, linux/arch/i386/kernel/semaphore.c
- */
-
-#include <linux/errno.h>
-#include <linux/sched.h>
-#include <linux/init.h>
-
-#include <asm/semaphore.h>
-
-/*
- * Semaphores are implemented using a two-way counter:
- * The "count" variable is decremented for each process
- * that tries to acquire the semaphore, while the "sleeping"
- * variable is a count of such acquires.
- *
- * Notably, the inline "up()" and "down()" functions can
- * efficiently test if they need to do any extra work (up
- * needs to do something only if count was negative before
- * the increment operation.
- *
- * "sleeping" and the contention routine ordering is
- * protected by the semaphore spinlock.
- *
- * Note that these functions are only called when there is
- * contention on the lock, and as such all this is the
- * "non-critical" part of the whole semaphore business. The
- * critical part is the inline stuff in <asm/semaphore.h>
- * where we want to avoid any extra jumps and calls.
- */
-
-/*
- * Logic:
- * - only on a boundary condition do we need to care. When we go
- * from a negative count to a non-negative, we wake people up.
- * - when we go from a non-negative count to a negative do we
- * (a) synchronize with the "sleeper" count and (b) make sure
- * that we're on the wakeup list before we synchronize so that
- * we cannot lose wakeup events.
- */
-
-void __up(struct semaphore *sem)
-{
- wake_up(&sem->wait);
-}
-
-static DEFINE_SPINLOCK(semaphore_lock);
-
-void __sched __down(struct semaphore * sem)
-{
- struct task_struct *tsk = current;
- DECLARE_WAITQUEUE(wait, tsk);
- tsk->state = TASK_UNINTERRUPTIBLE;
- add_wait_queue_exclusive(&sem->wait, &wait);
-
- spin_lock_irq(&semaphore_lock);
- sem->sleepers++;
- for (;;) {
- int sleepers = sem->sleepers;
-
- /*
- * Add "everybody else" into it. They aren't
- * playing, because we own the spinlock.
- */
- if (!atomic_add_negative(sleepers - 1, &sem->count)) {
- sem->sleepers = 0;
- break;
- }
- sem->sleepers = 1; /* us - see -1 above */
- spin_unlock_irq(&semaphore_lock);
-
- schedule();
- tsk->state = TASK_UNINTERRUPTIBLE;
- spin_lock_irq(&semaphore_lock);
- }
- spin_unlock_irq(&semaphore_lock);
- remove_wait_queue(&sem->wait, &wait);
- tsk->state = TASK_RUNNING;
- wake_up(&sem->wait);
-}
-
-int __sched __down_interruptible(struct semaphore * sem)
-{
- int retval = 0;
- struct task_struct *tsk = current;
- DECLARE_WAITQUEUE(wait, tsk);
- tsk->state = TASK_INTERRUPTIBLE;
- add_wait_queue_exclusive(&sem->wait, &wait);
-
- spin_lock_irq(&semaphore_lock);
- sem->sleepers ++;
- for (;;) {
- int sleepers = sem->sleepers;
-
- /*
- * With signals pending, this turns into
- * the trylock failure case - we won't be
- * sleeping, and we* can't get the lock as
- * it has contention. Just correct the count
- * and exit.
- */
- if (signal_pending(current)) {
- retval = -EINTR;
- sem->sleepers = 0;
- atomic_add(sleepers, &sem->count);
- break;
- }
-
- /*
- * Add "everybody else" into it. They aren't
- * playing, because we own the spinlock. The
- * "-1" is because we're still hoping to get
- * the lock.
- */
- if (!atomic_add_negative(sleepers - 1, &sem->count)) {
- sem->sleepers = 0;
- break;
- }
- sem->sleepers = 1; /* us - see -1 above */
- spin_unlock_irq(&semaphore_lock);
-
- schedule();
- tsk->state = TASK_INTERRUPTIBLE;
- spin_lock_irq(&semaphore_lock);
- }
- spin_unlock_irq(&semaphore_lock);
- tsk->state = TASK_RUNNING;
- remove_wait_queue(&sem->wait, &wait);
- wake_up(&sem->wait);
- return retval;
-}
-
-/*
- * Trylock failed - make sure we correct for
- * having decremented the count.
- */
-int __down_trylock(struct semaphore * sem)
-{
- unsigned long flags;
- int sleepers;
-
- spin_lock_irqsave(&semaphore_lock, flags);
- sleepers = sem->sleepers + 1;
- sem->sleepers = 0;
-
- /*
- * Add "everybody else" and us into it. They aren't
- * playing, because we own the spinlock.
- */
- if (!atomic_add_negative(sleepers, &sem->count))
- wake_up(&sem->wait);
-
- spin_unlock_irqrestore(&semaphore_lock, flags);
- return 1;
-}
diff --git a/arch/v850/kernel/v850_ksyms.c b/arch/v850/kernel/v850_ksyms.c
index 93575fd..8d386a5 100644
--- a/arch/v850/kernel/v850_ksyms.c
+++ b/arch/v850/kernel/v850_ksyms.c
@@ -11,7 +11,6 @@
#include <asm/pgalloc.h>
#include <asm/irq.h>
#include <asm/io.h>
-#include <asm/semaphore.h>
#include <asm/checksum.h>
#include <asm/current.h>
@@ -34,12 +33,6 @@ EXPORT_SYMBOL (memset);
EXPORT_SYMBOL (memcpy);
EXPORT_SYMBOL (memmove);
-/* semaphores */
-EXPORT_SYMBOL (__down);
-EXPORT_SYMBOL (__down_interruptible);
-EXPORT_SYMBOL (__down_trylock);
-EXPORT_SYMBOL (__up);
-
/*
* libgcc functions - functions that are used internally by the
* compiler... (prototypes are not correct though, but that
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 4a88cf7..e975fe7 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -52,13 +52,6 @@ config STACKTRACE_SUPPORT
config HAVE_LATENCYTOP_SUPPORT
def_bool y
-config SEMAPHORE_SLEEPERS
- def_bool y
-
-config FAST_CMPXCHG_LOCAL
- bool
- default y
-
config MMU
def_bool y
diff --git a/arch/x86/kernel/i386_ksyms_32.c b/arch/x86/kernel/i386_ksyms_32.c
index 0616278..deb4378 100644
--- a/arch/x86/kernel/i386_ksyms_32.c
+++ b/arch/x86/kernel/i386_ksyms_32.c
@@ -1,13 +1,8 @@
#include <linux/module.h>
-#include <asm/semaphore.h>
#include <asm/checksum.h>
#include <asm/desc.h>
#include <asm/pgtable.h>
-EXPORT_SYMBOL(__down_failed);
-EXPORT_SYMBOL(__down_failed_interruptible);
-EXPORT_SYMBOL(__down_failed_trylock);
-EXPORT_SYMBOL(__up_wakeup);
/* Networking helper routines. */
EXPORT_SYMBOL(csum_partial_copy_generic);
diff --git a/arch/x86/kernel/x8664_ksyms_64.c b/arch/x86/kernel/x8664_ksyms_64.c
index a66e9c1..95a993e 100644
--- a/arch/x86/kernel/x8664_ksyms_64.c
+++ b/arch/x86/kernel/x8664_ksyms_64.c
@@ -4,7 +4,6 @@
#include <linux/module.h>
#include <linux/smp.h>
-#include <asm/semaphore.h>
#include <asm/processor.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
@@ -12,11 +11,6 @@
EXPORT_SYMBOL(kernel_thread);
-EXPORT_SYMBOL(__down_failed);
-EXPORT_SYMBOL(__down_failed_interruptible);
-EXPORT_SYMBOL(__down_failed_trylock);
-EXPORT_SYMBOL(__up_wakeup);
-
EXPORT_SYMBOL(__get_user_1);
EXPORT_SYMBOL(__get_user_2);
EXPORT_SYMBOL(__get_user_4);
diff --git a/arch/x86/lib/semaphore_32.S b/arch/x86/lib/semaphore_32.S
index 3899bd3..648fe47 100644
--- a/arch/x86/lib/semaphore_32.S
+++ b/arch/x86/lib/semaphore_32.S
@@ -30,89 +30,6 @@
* value or just clobbered..
*/
.section .sched.text, "ax"
-ENTRY(__down_failed)
- CFI_STARTPROC
- FRAME
- pushl %edx
- CFI_ADJUST_CFA_OFFSET 4
- CFI_REL_OFFSET edx,0
- pushl %ecx
- CFI_ADJUST_CFA_OFFSET 4
- CFI_REL_OFFSET ecx,0
- call __down
- popl %ecx
- CFI_ADJUST_CFA_OFFSET -4
- CFI_RESTORE ecx
- popl %edx
- CFI_ADJUST_CFA_OFFSET -4
- CFI_RESTORE edx
- ENDFRAME
- ret
- CFI_ENDPROC
- ENDPROC(__down_failed)
-
-ENTRY(__down_failed_interruptible)
- CFI_STARTPROC
- FRAME
- pushl %edx
- CFI_ADJUST_CFA_OFFSET 4
- CFI_REL_OFFSET edx,0
- pushl %ecx
- CFI_ADJUST_CFA_OFFSET 4
- CFI_REL_OFFSET ecx,0
- call __down_interruptible
- popl %ecx
- CFI_ADJUST_CFA_OFFSET -4
- CFI_RESTORE ecx
- popl %edx
- CFI_ADJUST_CFA_OFFSET -4
- CFI_RESTORE edx
- ENDFRAME
- ret
- CFI_ENDPROC
- ENDPROC(__down_failed_interruptible)
-
-ENTRY(__down_failed_trylock)
- CFI_STARTPROC
- FRAME
- pushl %edx
- CFI_ADJUST_CFA_OFFSET 4
- CFI_REL_OFFSET edx,0
- pushl %ecx
- CFI_ADJUST_CFA_OFFSET 4
- CFI_REL_OFFSET ecx,0
- call __down_trylock
- popl %ecx
- CFI_ADJUST_CFA_OFFSET -4
- CFI_RESTORE ecx
- popl %edx
- CFI_ADJUST_CFA_OFFSET -4
- CFI_RESTORE edx
- ENDFRAME
- ret
- CFI_ENDPROC
- ENDPROC(__down_failed_trylock)
-
-ENTRY(__up_wakeup)
- CFI_STARTPROC
- FRAME
- pushl %edx
- CFI_ADJUST_CFA_OFFSET 4
- CFI_REL_OFFSET edx,0
- pushl %ecx
- CFI_ADJUST_CFA_OFFSET 4
- CFI_REL_OFFSET ecx,0
- call __up
- popl %ecx
- CFI_ADJUST_CFA_OFFSET -4
- CFI_RESTORE ecx
- popl %edx
- CFI_ADJUST_CFA_OFFSET -4
- CFI_RESTORE edx
- ENDFRAME
- ret
- CFI_ENDPROC
- ENDPROC(__up_wakeup)
/*
* rw spinlock fallbacks
diff --git a/arch/x86/lib/thunk_64.S b/arch/x86/lib/thunk_64.S
index 8b92d42..e009251 100644
--- a/arch/x86/lib/thunk_64.S
+++ b/arch/x86/lib/thunk_64.S
@@ -41,11 +41,6 @@
thunk rwsem_downgrade_thunk,rwsem_downgrade_wake
#endif
- thunk __down_failed,__down
- thunk_retrax __down_failed_interruptible,__down_interruptible
- thunk_retrax __down_failed_trylock,__down_trylock
- thunk __up_wakeup,__up
-
#ifdef CONFIG_TRACE_IRQFLAGS
thunk trace_hardirqs_on_thunk,trace_hardirqs_on
thunk trace_hardirqs_off_thunk,trace_hardirqs_off
diff --git a/arch/xtensa/kernel/Makefile b/arch/xtensa/kernel/Makefile
index f582d6a..7419dbc 100644
--- a/arch/xtensa/kernel/Makefile
+++ b/arch/xtensa/kernel/Makefile
@@ -5,7 +5,7 @@
extra-y := head.o vmlinux.lds
-obj-y := align.o entry.o irq.o coprocessor.o process.o ptrace.o semaphore.o \
+obj-y := align.o entry.o irq.o coprocessor.o process.o ptrace.o \
setup.o signal.o syscall.o time.o traps.o vectors.o platform.o \
pci-dma.o init_task.o io.o
diff --git a/arch/xtensa/kernel/semaphore.c b/arch/xtensa/kernel/semaphore.c
deleted file mode 100644
index 995c641..0000000
--- a/arch/xtensa/kernel/semaphore.c
+++ /dev/null
@@ -1,226 +0,0 @@
-/*
- * arch/xtensa/kernel/semaphore.c
- *
- * Generic semaphore code. Buyer beware. Do your own specific changes
- * in <asm/semaphore-helper.h>
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2001 - 2005 Tensilica Inc.
- *
- * Joe Taylor <joe@tensilica.com, joetylr@yahoo.com>
- * Chris Zankel <chris@zankel.net>
- * Marc Gauthier<marc@tensilica.com, marc@alumni.uwaterloo.ca>
- * Kevin Chea
- */
-
-#include <linux/sched.h>
-#include <linux/wait.h>
-#include <linux/init.h>
-#include <asm/semaphore.h>
-#include <asm/errno.h>
-
-/*
- * These two _must_ execute atomically wrt each other.
- */
-
-static __inline__ void wake_one_more(struct semaphore * sem)
-{
- atomic_inc((atomic_t *)&sem->sleepers);
-}
-
-static __inline__ int waking_non_zero(struct semaphore *sem)
-{
- unsigned long flags;
- int ret = 0;
-
- spin_lock_irqsave(&semaphore_wake_lock, flags);
- if (sem->sleepers > 0) {
- sem->sleepers--;
- ret = 1;
- }
- spin_unlock_irqrestore(&semaphore_wake_lock, flags);
- return ret;
-}
-
-/*
- * waking_non_zero_interruptible:
- * 1 got the lock
- * 0 go to sleep
- * -EINTR interrupted
- *
- * We must undo the sem->count down_interruptible() increment while we are
- * protected by the spinlock in order to make atomic this atomic_inc() with the
- * atomic_read() in wake_one_more(), otherwise we can race. -arca
- */
-
-static __inline__ int waking_non_zero_interruptible(struct semaphore *sem,
- struct task_struct *tsk)
-{
- unsigned long flags;
- int ret = 0;
-
- spin_lock_irqsave(&semaphore_wake_lock, flags);
- if (sem->sleepers > 0) {
- sem->sleepers--;
- ret = 1;
- } else if (signal_pending(tsk)) {
- atomic_inc(&sem->count);
- ret = -EINTR;
- }
- spin_unlock_irqrestore(&semaphore_wake_lock, flags);
- return ret;
-}
-
-/*
- * waking_non_zero_trylock:
- * 1 failed to lock
- * 0 got the lock
- *
- * We must undo the sem->count down_trylock() increment while we are
- * protected by the spinlock in order to make atomic this atomic_inc() with the
- * atomic_read() in wake_one_more(), otherwise we can race. -arca
- */
-
-static __inline__ int waking_non_zero_trylock(struct semaphore *sem)
-{
- unsigned long flags;
- int ret = 1;
-
- spin_lock_irqsave(&semaphore_wake_lock, flags);
- if (sem->sleepers <= 0)
- atomic_inc(&sem->count);
- else {
- sem->sleepers--;
- ret = 0;
- }
- spin_unlock_irqrestore(&semaphore_wake_lock, flags);
- return ret;
-}
-
-DEFINE_SPINLOCK(semaphore_wake_lock);
-
-/*
- * Semaphores are implemented using a two-way counter:
- * The "count" variable is decremented for each process
- * that tries to sleep, while the "waking" variable is
- * incremented when the "up()" code goes to wake up waiting
- * processes.
- *
- * Notably, the inline "up()" and "down()" functions can
- * efficiently test if they need to do any extra work (up
- * needs to do something only if count was negative before
- * the increment operation.
- *
- * waking_non_zero() (from asm/semaphore.h) must execute
- * atomically.
- *
- * When __up() is called, the count was negative before
- * incrementing it, and we need to wake up somebody.
- *
- * This routine adds one to the count of processes that need to
- * wake up and exit. ALL waiting processes actually wake up but
- * only the one that gets to the "waking" field first will gate
- * through and acquire the semaphore. The others will go back
- * to sleep.
- *
- * Note that these functions are only called when there is
- * contention on the lock, and as such all this is the
- * "non-critical" part of the whole semaphore business. The
- * critical part is the inline stuff in <asm/semaphore.h>
- * where we want to avoid any extra jumps and calls.
- */
-
-void __up(struct semaphore *sem)
-{
- wake_one_more(sem);
- wake_up(&sem->wait);
-}
-
-/*
- * Perform the "down" function. Return zero for semaphore acquired,
- * return negative for signalled out of the function.
- *
- * If called from __down, the return is ignored and the wait loop is
- * not interruptible. This means that a task waiting on a semaphore
- * using "down()" cannot be killed until someone does an "up()" on
- * the semaphore.
- *
- * If called from __down_interruptible, the return value gets checked
- * upon return. If the return value is negative then the task continues
- * with the negative value in the return register (it can be tested by
- * the caller).
- *
- * Either form may be used in conjunction with "up()".
- *
- */
-
-#define DOWN_VAR \
- struct task_struct *tsk = current; \
- wait_queue_t wait; \
- init_waitqueue_entry(&wait, tsk);
-
-#define DOWN_HEAD(task_state) \
- \
- \
- tsk->state = (task_state); \
- add_wait_queue(&sem->wait, &wait); \
- \
- /* \
- * Ok, we're set up. sem->count is known to be less than zero \
- * so we must wait. \
- * \
- * We can let go the lock for purposes of waiting. \
- * We re-acquire it after awaking so as to protect \
- * all semaphore operations. \
- * \
- * If "up()" is called before we call waking_non_zero() then \
- * we will catch it right away. If it is called later then \
- * we will have to go through a wakeup cycle to catch it. \
- * \
- * Multiple waiters contend for the semaphore lock to see \
- * who gets to gate through and who has to wait some more. \
- */ \
- for (;;) {
-
-#define DOWN_TAIL(task_state) \
- tsk->state = (task_state); \
- } \
- tsk->state = TASK_RUNNING; \
- remove_wait_queue(&sem->wait, &wait);
-
-void __sched __down(struct semaphore * sem)
-{
- DOWN_VAR
- DOWN_HEAD(TASK_UNINTERRUPTIBLE)
- if (waking_non_zero(sem))
- break;
- schedule();
- DOWN_TAIL(TASK_UNINTERRUPTIBLE)
-}
-
-int __sched __down_interruptible(struct semaphore * sem)
-{
- int ret = 0;
- DOWN_VAR
- DOWN_HEAD(TASK_INTERRUPTIBLE)
-
- ret = waking_non_zero_interruptible(sem, tsk);
- if (ret)
- {
- if (ret == 1)
- /* ret != 0 only if we get interrupted -arca */
- ret = 0;
- break;
- }
- schedule();
- DOWN_TAIL(TASK_INTERRUPTIBLE)
- return ret;
-}
-
-int __down_trylock(struct semaphore * sem)
-{
- return waking_non_zero_trylock(sem);
-}
diff --git a/arch/xtensa/kernel/xtensa_ksyms.c b/arch/xtensa/kernel/xtensa_ksyms.c
index 60dbdb4..6e52cdd 100644
--- a/arch/xtensa/kernel/xtensa_ksyms.c
+++ b/arch/xtensa/kernel/xtensa_ksyms.c
@@ -26,7 +26,6 @@
#include <asm/io.h>
#include <asm/page.h>
#include <asm/pgalloc.h>
-#include <asm/semaphore.h>
#ifdef CONFIG_BLK_DEV_FD
#include <asm/floppy.h>
#endif
@@ -71,14 +70,6 @@ EXPORT_SYMBOL(__umodsi3);
EXPORT_SYMBOL(__udivdi3);
EXPORT_SYMBOL(__umoddi3);
-/*
- * Semaphore operations
- */
-EXPORT_SYMBOL(__down);
-EXPORT_SYMBOL(__down_interruptible);
-EXPORT_SYMBOL(__down_trylock);
-EXPORT_SYMBOL(__up);
-
#ifdef CONFIG_NET
/*
* Networking support
diff --git a/include/asm-alpha/semaphore.h b/include/asm-alpha/semaphore.h
index f1e9278..d9b2034 100644
--- a/include/asm-alpha/semaphore.h
+++ b/include/asm-alpha/semaphore.h
@@ -1,149 +1 @@
-#ifndef _ALPHA_SEMAPHORE_H
-#define _ALPHA_SEMAPHORE_H
-
-/*
- * SMP- and interrupt-safe semaphores..
- *
- * (C) Copyright 1996 Linus Torvalds
- * (C) Copyright 1996, 2000 Richard Henderson
- */
-
-#include <asm/current.h>
-#include <asm/system.h>
-#include <asm/atomic.h>
-#include <linux/compiler.h>
-#include <linux/wait.h>
-#include <linux/rwsem.h>
-
-struct semaphore {
- atomic_t count;
- wait_queue_head_t wait;
-};
-
-#define __SEMAPHORE_INITIALIZER(name, n) \
-{ \
- .count = ATOMIC_INIT(n), \
- .wait = __WAIT_QUEUE_HEAD_INITIALIZER((name).wait), \
-}
-
-#define __DECLARE_SEMAPHORE_GENERIC(name,count) \
- struct semaphore name = __SEMAPHORE_INITIALIZER(name,count)
-
-#define DECLARE_MUTEX(name) __DECLARE_SEMAPHORE_GENERIC(name,1)
-
-static inline void sema_init(struct semaphore *sem, int val)
-{
- /*
- * Logically,
- * *sem = (struct semaphore)__SEMAPHORE_INITIALIZER((*sem),val);
- * except that gcc produces better initializing by parts yet.
- */
-
- atomic_set(&sem->count, val);
- init_waitqueue_head(&sem->wait);
-}
-
-static inline void init_MUTEX (struct semaphore *sem)
-{
- sema_init(sem, 1);
-}
-
-static inline void init_MUTEX_LOCKED (struct semaphore *sem)
-{
- sema_init(sem, 0);
-}
-
-extern void down(struct semaphore *);
-extern void __down_failed(struct semaphore *);
-extern int down_interruptible(struct semaphore *);
-extern int __down_failed_interruptible(struct semaphore *);
-extern int down_trylock(struct semaphore *);
-extern void up(struct semaphore *);
-extern void __up_wakeup(struct semaphore *);
-
-/*
- * Hidden out of line code is fun, but extremely messy. Rely on newer
- * compilers to do a respectable job with this. The contention cases
- * are handled out of line in arch/alpha/kernel/semaphore.c.
- */
-
-static inline void __down(struct semaphore *sem)
-{
- long count;
- might_sleep();
- count = atomic_dec_return(&sem->count);
- if (unlikely(count < 0))
- __down_failed(sem);
-}
-
-static inline int __down_interruptible(struct semaphore *sem)
-{
- long count;
- might_sleep();
- count = atomic_dec_return(&sem->count);
- if (unlikely(count < 0))
- return __down_failed_interruptible(sem);
- return 0;
-}
-
-/*
- * down_trylock returns 0 on success, 1 if we failed to get the lock.
- */
-
-static inline int __down_trylock(struct semaphore *sem)
-{
- long ret;
-
- /* "Equivalent" C:
-
- do {
- ret = ldl_l;
- --ret;
- if (ret < 0)
- break;
- ret = stl_c = ret;
- } while (ret == 0);
- */
- __asm__ __volatile__(
- "1: ldl_l %0,%1\n"
- " subl %0,1,%0\n"
- " blt %0,2f\n"
- " stl_c %0,%1\n"
- " beq %0,3f\n"
- " mb\n"
- "2:\n"
- ".subsection 2\n"
- "3: br 1b\n"
- ".previous"
- : "=&r" (ret), "=m" (sem->count)
- : "m" (sem->count));
-
- return ret < 0;
-}
-
-static inline void __up(struct semaphore *sem)
-{
- if (unlikely(atomic_inc_return(&sem->count) <= 0))
- __up_wakeup(sem);
-}
-
-#if !defined(CONFIG_DEBUG_SEMAPHORE)
-extern inline void down(struct semaphore *sem)
-{
- __down(sem);
-}
-extern inline int down_interruptible(struct semaphore *sem)
-{
- return __down_interruptible(sem);
-}
-extern inline int down_trylock(struct semaphore *sem)
-{
- return __down_trylock(sem);
-}
-extern inline void up(struct semaphore *sem)
-{
- __up(sem);
-}
-#endif
-
-#endif
+#include <linux/semaphore.h>
diff --git a/include/asm-arm/semaphore-helper.h b/include/asm-arm/semaphore-helper.h
deleted file mode 100644
index 1d7f198..0000000
--- a/include/asm-arm/semaphore-helper.h
+++ /dev/null
@@ -1,84 +0,0 @@
-#ifndef ASMARM_SEMAPHORE_HELPER_H
-#define ASMARM_SEMAPHORE_HELPER_H
-
-/*
- * These two _must_ execute atomically wrt each other.
- */
-static inline void wake_one_more(struct semaphore * sem)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&semaphore_wake_lock, flags);
- if (atomic_read(&sem->count) <= 0)
- sem->waking++;
- spin_unlock_irqrestore(&semaphore_wake_lock, flags);
-}
-
-static inline int waking_non_zero(struct semaphore *sem)
-{
- unsigned long flags;
- int ret = 0;
-
- spin_lock_irqsave(&semaphore_wake_lock, flags);
- if (sem->waking > 0) {
- sem->waking--;
- ret = 1;
- }
- spin_unlock_irqrestore(&semaphore_wake_lock, flags);
- return ret;
-}
-
-/*
- * waking non zero interruptible
- * 1 got the lock
- * 0 go to sleep
- * -EINTR interrupted
- *
- * We must undo the sem->count down_interruptible() increment while we are
- * protected by the spinlock in order to make this atomic_inc() with the
- * atomic_read() in wake_one_more(), otherwise we can race. -arca
- */
-static inline int waking_non_zero_interruptible(struct semaphore *sem,
- struct task_struct *tsk)
-{
- unsigned long flags;
- int ret = 0;
-
- spin_lock_irqsave(&semaphore_wake_lock, flags);
- if (sem->waking > 0) {
- sem->waking--;
- ret = 1;
- } else if (signal_pending(tsk)) {
- atomic_inc(&sem->count);
- ret = -EINTR;
- }
- spin_unlock_irqrestore(&semaphore_wake_lock, flags);
- return ret;
-}
-
-/*
- * waking_non_zero_try_lock:
- * 1 failed to lock
- * 0 got the lock
- *
- * We must undo the sem->count down_interruptible() increment while we are
- * protected by the spinlock in order to make this atomic_inc() with the
- * atomic_read() in wake_one_more(), otherwise we can race. -arca
- */
-static inline int waking_non_zero_trylock(struct semaphore *sem)
-{
- unsigned long flags;
- int ret = 1;
-
- spin_lock_irqsave(&semaphore_wake_lock, flags);
- if (sem->waking <= 0)
- atomic_inc(&sem->count);
- else {
- sem->waking--;
- ret = 0;
- }
- spin_unlock_irqrestore(&semaphore_wake_lock, flags);
- return ret;
-}
-
-#endif
diff --git a/include/asm-arm/semaphore.h b/include/asm-arm/semaphore.h
index 1c8b441..d9b2034 100644
--- a/include/asm-arm/semaphore.h
+++ b/include/asm-arm/semaphore.h
@@ -1,98 +1 @@
-/*
- * linux/include/asm-arm/semaphore.h
- */
-#ifndef __ASM_ARM_SEMAPHORE_H
-#define __ASM_ARM_SEMAPHORE_H
-
-#include <linux/linkage.h>
-#include <linux/spinlock.h>
-#include <linux/wait.h>
-#include <linux/rwsem.h>
-
-#include <asm/atomic.h>
-#include <asm/locks.h>
-
-struct semaphore {
- atomic_t count;
- int sleepers;
- wait_queue_head_t wait;
-};
-
-#define __SEMAPHORE_INIT(name, cnt) \
-{ \
- .count = ATOMIC_INIT(cnt), \
- .wait = __WAIT_QUEUE_HEAD_INITIALIZER((name).wait), \
-}
-
-#define __DECLARE_SEMAPHORE_GENERIC(name,count) \
- struct semaphore name = __SEMAPHORE_INIT(name,count)
-
-#define DECLARE_MUTEX(name) __DECLARE_SEMAPHORE_GENERIC(name,1)
-
-static inline void sema_init(struct semaphore *sem, int val)
-{
- atomic_set(&sem->count, val);
- sem->sleepers = 0;
- init_waitqueue_head(&sem->wait);
-}
-
-static inline void init_MUTEX(struct semaphore *sem)
-{
- sema_init(sem, 1);
-}
-
-static inline void init_MUTEX_LOCKED(struct semaphore *sem)
-{
- sema_init(sem, 0);
-}
-
-/*
- * special register calling convention
- */
-asmlinkage void __down_failed(void);
-asmlinkage int __down_interruptible_failed(void);
-asmlinkage int __down_trylock_failed(void);
-asmlinkage void __up_wakeup(void);
-
-extern void __down(struct semaphore * sem);
-extern int __down_interruptible(struct semaphore * sem);
-extern int __down_trylock(struct semaphore * sem);
-extern void __up(struct semaphore * sem);
-
-/*
- * This is ugly, but we want the default case to fall through.
- * "__down" is the actual routine that waits...
- */
-static inline void down(struct semaphore * sem)
-{
- might_sleep();
- __down_op(sem, __down_failed);
-}
-
-/*
- * This is ugly, but we want the default case to fall through.
- * "__down_interruptible" is the actual routine that waits...
- */
-static inline int down_interruptible (struct semaphore * sem)
-{
- might_sleep();
- return __down_op_ret(sem, __down_interruptible_failed);
-}
-
-static inline int down_trylock(struct semaphore *sem)
-{
- return __down_op_ret(sem, __down_trylock_failed);
-}
-
-/*
- * Note! This is subtle. We jump to wake people up only if
- * the semaphore was negative (== somebody was waiting on it).
- * The default case (no contention) will result in NO
- * jumps for both down() and up().
- */
-static inline void up(struct semaphore * sem)
-{
- __up_op(sem, __up_wakeup);
-}
-
-#endif
+#include <linux/semaphore.h>
diff --git a/include/asm-avr32/semaphore.h b/include/asm-avr32/semaphore.h
index feaf1d4..d9b2034 100644
--- a/include/asm-avr32/semaphore.h
+++ b/include/asm-avr32/semaphore.h
@@ -1,108 +1 @@
-/*
- * SMP- and interrupt-safe semaphores.
- *
- * Copyright (C) 2006 Atmel Corporation
- *
- * Based on include/asm-i386/semaphore.h
- * Copyright (C) 1996 Linus Torvalds
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-#ifndef __ASM_AVR32_SEMAPHORE_H
-#define __ASM_AVR32_SEMAPHORE_H
-
-#include <linux/linkage.h>
-
-#include <asm/system.h>
-#include <asm/atomic.h>
-#include <linux/wait.h>
-#include <linux/rwsem.h>
-
-struct semaphore {
- atomic_t count;
- int sleepers;
- wait_queue_head_t wait;
-};
-
-#define __SEMAPHORE_INITIALIZER(name, n) \
-{ \
- .count = ATOMIC_INIT(n), \
- .wait = __WAIT_QUEUE_HEAD_INITIALIZER((name).wait) \
-}
-
-#define __DECLARE_SEMAPHORE_GENERIC(name,count) \
- struct semaphore name = __SEMAPHORE_INITIALIZER(name,count)
-
-#define DECLARE_MUTEX(name) __DECLARE_SEMAPHORE_GENERIC(name,1)
-
-static inline void sema_init (struct semaphore *sem, int val)
-{
- atomic_set(&sem->count, val);
- sem->sleepers = 0;
- init_waitqueue_head(&sem->wait);
-}
-
-static inline void init_MUTEX (struct semaphore *sem)
-{
- sema_init(sem, 1);
-}
-
-static inline void init_MUTEX_LOCKED (struct semaphore *sem)
-{
- sema_init(sem, 0);
-}
-
-void __down(struct semaphore * sem);
-int __down_interruptible(struct semaphore * sem);
-void __up(struct semaphore * sem);
-
-/*
- * This is ugly, but we want the default case to fall through.
- * "__down_failed" is a special asm handler that calls the C
- * routine that actually waits. See arch/i386/kernel/semaphore.c
- */
-static inline void down(struct semaphore * sem)
-{
- might_sleep();
- if (unlikely(atomic_dec_return (&sem->count) < 0))
- __down (sem);
-}
-
-/*
- * Interruptible try to acquire a semaphore. If we obtained
- * it, return zero. If we were interrupted, returns -EINTR
- */
-static inline int down_interruptible(struct semaphore * sem)
-{
- int ret = 0;
-
- might_sleep();
- if (unlikely(atomic_dec_return (&sem->count) < 0))
- ret = __down_interruptible (sem);
- return ret;
-}
-
-/*
- * Non-blockingly attempt to down() a semaphore.
- * Returns zero if we acquired it
- */
-static inline int down_trylock(struct semaphore * sem)
-{
- return atomic_dec_if_positive(&sem->count) < 0;
-}
-
-/*
- * Note! This is subtle. We jump to wake people up only if
- * the semaphore was negative (== somebody was waiting on it).
- * The default case (no contention) will result in NO
- * jumps for both down() and up().
- */
-static inline void up(struct semaphore * sem)
-{
- if (unlikely(atomic_inc_return (&sem->count) <= 0))
- __up (sem);
-}
-
-#endif /*__ASM_AVR32_SEMAPHORE_H */
+#include <linux/semaphore.h>
diff --git a/include/asm-blackfin/semaphore-helper.h b/include/asm-blackfin/semaphore-helper.h
deleted file mode 100644
index 9082b0d..0000000
--- a/include/asm-blackfin/semaphore-helper.h
+++ /dev/null
@@ -1,82 +0,0 @@
-/* Based on M68K version, Lineo Inc. May 2001 */
-
-#ifndef _BFIN_SEMAPHORE_HELPER_H
-#define _BFIN_SEMAPHORE_HELPER_H
-
-/*
- * SMP- and interrupt-safe semaphores helper functions.
- *
- * (C) Copyright 1996 Linus Torvalds
- *
- */
-
-#include <asm/errno.h>
-
-/*
- * These two _must_ execute atomically wrt each other.
- */
-static inline void wake_one_more(struct semaphore *sem)
-{
- atomic_inc(&sem->waking);
-}
-
-static inline int waking_non_zero(struct semaphore *sem)
-{
- int ret;
- unsigned long flags = 0;
-
- spin_lock_irqsave(&semaphore_wake_lock, flags);
- ret = 0;
- if (atomic_read(&sem->waking) > 0) {
- atomic_dec(&sem->waking);
- ret = 1;
- }
- spin_unlock_irqrestore(&semaphore_wake_lock, flags);
- return ret;
-}
-
-/*
- * waking_non_zero_interruptible:
- * 1 got the lock
- * 0 go to sleep
- * -EINTR interrupted
- */
-static inline int waking_non_zero_interruptible(struct semaphore *sem,
- struct task_struct *tsk)
-{
- int ret = 0;
- unsigned long flags = 0;
-
- spin_lock_irqsave(&semaphore_wake_lock, flags);
- if (atomic_read(&sem->waking) > 0) {
- atomic_dec(&sem->waking);
- ret = 1;
- } else if (signal_pending(tsk)) {
- atomic_inc(&sem->count);
- ret = -EINTR;
- }
- spin_unlock_irqrestore(&semaphore_wake_lock, flags);
- return ret;
-}
-
-/*
- * waking_non_zero_trylock:
- * 1 failed to lock
- * 0 got the lock
- */
-static inline int waking_non_zero_trylock(struct semaphore *sem)
-{
- int ret = 1;
- unsigned long flags = 0;
-
- spin_lock_irqsave(&semaphore_wake_lock, flags);
- if (atomic_read(&sem->waking) > 0) {
- atomic_dec(&sem->waking);
- ret = 0;
- } else
- atomic_inc(&sem->count);
- spin_unlock_irqrestore(&semaphore_wake_lock, flags);
- return ret;
-}
-
-#endif /* _BFIN_SEMAPHORE_HELPER_H */
diff --git a/include/asm-blackfin/semaphore.h b/include/asm-blackfin/semaphore.h
index 533f90f..d9b2034 100644
--- a/include/asm-blackfin/semaphore.h
+++ b/include/asm-blackfin/semaphore.h
@@ -1,105 +1 @@
-#ifndef _BFIN_SEMAPHORE_H
-#define _BFIN_SEMAPHORE_H
-
-#ifndef __ASSEMBLY__
-
-#include <linux/linkage.h>
-#include <linux/wait.h>
-#include <linux/spinlock.h>
-#include <linux/rwsem.h>
-#include <asm/atomic.h>
-
-/*
- * Interrupt-safe semaphores..
- *
- * (C) Copyright 1996 Linus Torvalds
- *
- * BFIN version by akbar hussain Lineo Inc April 2001
- *
- */
-
-struct semaphore {
- atomic_t count;
- int sleepers;
- wait_queue_head_t wait;
-};
-
-#define __SEMAPHORE_INITIALIZER(name, n) \
-{ \
- .count = ATOMIC_INIT(n), \
- .sleepers = 0, \
- .wait = __WAIT_QUEUE_HEAD_INITIALIZER((name).wait) \
-}
-
-#define __DECLARE_SEMAPHORE_GENERIC(name,count) \
- struct semaphore name = __SEMAPHORE_INITIALIZER(name,count)
-
-#define DECLARE_MUTEX(name) __DECLARE_SEMAPHORE_GENERIC(name,1)
-
-static inline void sema_init(struct semaphore *sem, int val)
-{
- *sem = (struct semaphore)__SEMAPHORE_INITIALIZER(*sem, val);
-}
-
-static inline void init_MUTEX(struct semaphore *sem)
-{
- sema_init(sem, 1);
-}
-
-static inline void init_MUTEX_LOCKED(struct semaphore *sem)
-{
- sema_init(sem, 0);
-}
-
-asmlinkage void __down(struct semaphore *sem);
-asmlinkage int __down_interruptible(struct semaphore *sem);
-asmlinkage int __down_trylock(struct semaphore *sem);
-asmlinkage void __up(struct semaphore *sem);
-
-extern spinlock_t semaphore_wake_lock;
-
-/*
- * This is ugly, but we want the default case to fall through.
- * "down_failed" is a special asm handler that calls the C
- * routine that actually waits.
- */
-static inline void down(struct semaphore *sem)
-{
- might_sleep();
- if (atomic_dec_return(&sem->count) < 0)
- __down(sem);
-}
-
-static inline int down_interruptible(struct semaphore *sem)
-{
- int ret = 0;
-
- might_sleep();
- if (atomic_dec_return(&sem->count) < 0)
- ret = __down_interruptible(sem);
- return (ret);
-}
-
-static inline int down_trylock(struct semaphore *sem)
-{
- int ret = 0;
-
- if (atomic_dec_return(&sem->count) < 0)
- ret = __down_trylock(sem);
- return ret;
-}
-
-/*
- * Note! This is subtle. We jump to wake people up only if
- * the semaphore was negative (== somebody was waiting on it).
- * The default case (no contention) will result in NO
- * jumps for both down() and up().
- */
-static inline void up(struct semaphore *sem)
-{
- if (atomic_inc_return(&sem->count) <= 0)
- __up(sem);
-}
-
-#endif /* __ASSEMBLY__ */
-#endif /* _BFIN_SEMAPHORE_H */
+#include <linux/semaphore.h>
diff --git a/include/asm-cris/semaphore-helper.h b/include/asm-cris/semaphore-helper.h
deleted file mode 100644
index 27bfeca..0000000
--- a/include/asm-cris/semaphore-helper.h
+++ /dev/null
@@ -1,78 +0,0 @@
-/* $Id: semaphore-helper.h,v 1.3 2001/03/26 15:00:33 orjanf Exp $
- *
- * SMP- and interrupt-safe semaphores helper functions. Generic versions, no
- * optimizations whatsoever...
- *
- */
-
-#ifndef _ASM_SEMAPHORE_HELPER_H
-#define _ASM_SEMAPHORE_HELPER_H
-
-#include <asm/atomic.h>
-#include <linux/errno.h>
-
-#define read(a) ((a)->counter)
-#define inc(a) (((a)->counter)++)
-#define dec(a) (((a)->counter)--)
-
-#define count_inc(a) ((*(a))++)
-
-/*
- * These two _must_ execute atomically wrt each other.
- */
-static inline void wake_one_more(struct semaphore * sem)
-{
- atomic_inc(&sem->waking);
-}
-
-static inline int waking_non_zero(struct semaphore *sem)
-{
- unsigned long flags;
- int ret = 0;
-
- local_irq_save(flags);
- if (read(&sem->waking) > 0) {
- dec(&sem->waking);
- ret = 1;
- }
- local_irq_restore(flags);
- return ret;
-}
-
-static inline int waking_non_zero_interruptible(struct semaphore *sem,
- struct task_struct *tsk)
-{
- int ret = 0;
- unsigned long flags;
-
- local_irq_save(flags);
- if (read(&sem->waking) > 0) {
- dec(&sem->waking);
- ret = 1;
- } else if (signal_pending(tsk)) {
- inc(&sem->count);
- ret = -EINTR;
- }
- local_irq_restore(flags);
- return ret;
-}
-
-static inline int waking_non_zero_trylock(struct semaphore *sem)
-{
- int ret = 1;
- unsigned long flags;
-
- local_irq_save(flags);
- if (read(&sem->waking) <= 0)
- inc(&sem->count);
- else {
- dec(&sem->waking);
- ret = 0;
- }
- local_irq_restore(flags);
- return ret;
-}
-
-#endif /* _ASM_SEMAPHORE_HELPER_H */
-
-
diff --git a/include/asm-cris/semaphore.h b/include/asm-cris/semaphore.h
index 31a4ac4..d9b2034 100644
--- a/include/asm-cris/semaphore.h
+++ b/include/asm-cris/semaphore.h
@@ -1,133 +1 @@
-/* $Id: semaphore.h,v 1.3 2001/05/08 13:54:09 bjornw Exp $ */
-
-/* On the i386 these are coded in asm, perhaps we should as well. Later.. */
-
-#ifndef _CRIS_SEMAPHORE_H
-#define _CRIS_SEMAPHORE_H
-
-#define RW_LOCK_BIAS 0x01000000
-
-#include <linux/wait.h>
-#include <linux/spinlock.h>
-#include <linux/rwsem.h>
-
-#include <asm/system.h>
-#include <asm/atomic.h>
-
-/*
- * CRIS semaphores, implemented in C-only so far.
- */
-
-struct semaphore {
- atomic_t count;
- atomic_t waking;
- wait_queue_head_t wait;
-};
-
-#define __SEMAPHORE_INITIALIZER(name, n) \
-{ \
- .count = ATOMIC_INIT(n), \
- .waking = ATOMIC_INIT(0), \
- .wait = __WAIT_QUEUE_HEAD_INITIALIZER((name).wait) \
-}
-
-#define __DECLARE_SEMAPHORE_GENERIC(name,count) \
- struct semaphore name = __SEMAPHORE_INITIALIZER(name,count)
-
-#define DECLARE_MUTEX(name) __DECLARE_SEMAPHORE_GENERIC(name,1)
-
-static inline void sema_init(struct semaphore *sem, int val)
-{
- *sem = (struct semaphore)__SEMAPHORE_INITIALIZER((*sem),val);
-}
-
-static inline void init_MUTEX (struct semaphore *sem)
-{
- sema_init(sem, 1);
-}
-
-static inline void init_MUTEX_LOCKED (struct semaphore *sem)
-{
- sema_init(sem, 0);
-}
-
-extern void __down(struct semaphore * sem);
-extern int __down_interruptible(struct semaphore * sem);
-extern int __down_trylock(struct semaphore * sem);
-extern void __up(struct semaphore * sem);
-
-/* notice - we probably can do cli/sti here instead of saving */
-
-static inline void down(struct semaphore * sem)
-{
- unsigned long flags;
- int failed;
-
- might_sleep();
-
- /* atomically decrement the semaphores count, and if its negative, we wait */
- cris_atomic_save(sem, flags);
- failed = --(sem->count.counter) < 0;
- cris_atomic_restore(sem, flags);
- if(failed) {
- __down(sem);
- }
-}
-
-/*
- * This version waits in interruptible state so that the waiting
- * process can be killed. The down_interruptible routine
- * returns negative for signalled and zero for semaphore acquired.
- */
-
-static inline int down_interruptible(struct semaphore * sem)
-{
- unsigned long flags;
- int failed;
-
- might_sleep();
-
- /* atomically decrement the semaphores count, and if its negative, we wait */
- cris_atomic_save(sem, flags);
- failed = --(sem->count.counter) < 0;
- cris_atomic_restore(sem, flags);
- if(failed)
- failed = __down_interruptible(sem);
- return(failed);
-}
-
-static inline int down_trylock(struct semaphore * sem)
-{
- unsigned long flags;
- int failed;
-
- cris_atomic_save(sem, flags);
- failed = --(sem->count.counter) < 0;
- cris_atomic_restore(sem, flags);
- if(failed)
- failed = __down_trylock(sem);
- return(failed);
-
-}
-
-/*
- * Note! This is subtle. We jump to wake people up only if
- * the semaphore was negative (== somebody was waiting on it).
- * The default case (no contention) will result in NO
- * jumps for both down() and up().
- */
-static inline void up(struct semaphore * sem)
-{
- unsigned long flags;
- int wakeup;
-
- /* atomically increment the semaphores count, and if it was negative, we wake people */
- cris_atomic_save(sem, flags);
- wakeup = ++(sem->count.counter) <= 0;
- cris_atomic_restore(sem, flags);
- if(wakeup) {
- __up(sem);
- }
-}
-
-#endif
+#include <linux/semaphore.h>
diff --git a/include/asm-frv/semaphore.h b/include/asm-frv/semaphore.h
index d7aaa19..d9b2034 100644
--- a/include/asm-frv/semaphore.h
+++ b/include/asm-frv/semaphore.h
@@ -1,155 +1 @@
-/* semaphore.h: semaphores for the FR-V
- *
- * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-#ifndef _ASM_SEMAPHORE_H
-#define _ASM_SEMAPHORE_H
-
-#define RW_LOCK_BIAS 0x01000000
-
-#ifndef __ASSEMBLY__
-
-#include <linux/linkage.h>
-#include <linux/wait.h>
-#include <linux/spinlock.h>
-#include <linux/rwsem.h>
-
-/*
- * the semaphore definition
- * - if counter is >0 then there are tokens available on the semaphore for down to collect
- * - if counter is <=0 then there are no spare tokens, and anyone that wants one must wait
- * - if wait_list is not empty, then there are processes waiting for the semaphore
- */
-struct semaphore {
- unsigned counter;
- spinlock_t wait_lock;
- struct list_head wait_list;
-#ifdef CONFIG_DEBUG_SEMAPHORE
- unsigned __magic;
-#endif
-};
-
-#ifdef CONFIG_DEBUG_SEMAPHORE
-# define __SEM_DEBUG_INIT(name) , (long)&(name).__magic
-#else
-# define __SEM_DEBUG_INIT(name)
-#endif
-
-
-#define __SEMAPHORE_INITIALIZER(name,count) \
-{ count, SPIN_LOCK_UNLOCKED, LIST_HEAD_INIT((name).wait_list) __SEM_DEBUG_INIT(name) }
-
-#define __DECLARE_SEMAPHORE_GENERIC(name,count) \
- struct semaphore name = __SEMAPHORE_INITIALIZER(name,count)
-
-#define DECLARE_MUTEX(name) __DECLARE_SEMAPHORE_GENERIC(name,1)
-
-static inline void sema_init (struct semaphore *sem, int val)
-{
- *sem = (struct semaphore) __SEMAPHORE_INITIALIZER(*sem, val);
-}
-
-static inline void init_MUTEX (struct semaphore *sem)
-{
- sema_init(sem, 1);
-}
-
-static inline void init_MUTEX_LOCKED (struct semaphore *sem)
-{
- sema_init(sem, 0);
-}
-
-extern void __down(struct semaphore *sem, unsigned long flags);
-extern int __down_interruptible(struct semaphore *sem, unsigned long flags);
-extern void __up(struct semaphore *sem);
-
-static inline void down(struct semaphore *sem)
-{
- unsigned long flags;
-
-#ifdef CONFIG_DEBUG_SEMAPHORE
- CHECK_MAGIC(sem->__magic);
-#endif
-
- spin_lock_irqsave(&sem->wait_lock, flags);
- if (likely(sem->counter > 0)) {
- sem->counter--;
- spin_unlock_irqrestore(&sem->wait_lock, flags);
- }
- else {
- __down(sem, flags);
- }
-}
-
-static inline int down_interruptible(struct semaphore *sem)
-{
- unsigned long flags;
- int ret = 0;
-
-#ifdef CONFIG_DEBUG_SEMAPHORE
- CHECK_MAGIC(sem->__magic);
-#endif
-
- spin_lock_irqsave(&sem->wait_lock, flags);
- if (likely(sem->counter > 0)) {
- sem->counter--;
- spin_unlock_irqrestore(&sem->wait_lock, flags);
- }
- else {
- ret = __down_interruptible(sem, flags);
- }
- return ret;
-}
-
-/*
- * non-blockingly attempt to down() a semaphore.
- * - returns zero if we acquired it
- */
-static inline int down_trylock(struct semaphore *sem)
-{
- unsigned long flags;
- int success = 0;
-
-#ifdef CONFIG_DEBUG_SEMAPHORE
- CHECK_MAGIC(sem->__magic);
-#endif
-
- spin_lock_irqsave(&sem->wait_lock, flags);
- if (sem->counter > 0) {
- sem->counter--;
- success = 1;
- }
- spin_unlock_irqrestore(&sem->wait_lock, flags);
- return !success;
-}
-
-static inline void up(struct semaphore *sem)
-{
- unsigned long flags;
-
-#ifdef CONFIG_DEBUG_SEMAPHORE
- CHECK_MAGIC(sem->__magic);
-#endif
-
- spin_lock_irqsave(&sem->wait_lock, flags);
- if (!list_empty(&sem->wait_list))
- __up(sem);
- else
- sem->counter++;
- spin_unlock_irqrestore(&sem->wait_lock, flags);
-}
-
-static inline int sem_getcount(struct semaphore *sem)
-{
- return sem->counter;
-}
-
-#endif /* __ASSEMBLY__ */
-
-#endif
+#include <linux/semaphore.h>
diff --git a/include/asm-h8300/semaphore-helper.h b/include/asm-h8300/semaphore-helper.h
deleted file mode 100644
index 4fea36b..0000000
--- a/include/asm-h8300/semaphore-helper.h
+++ /dev/null
@@ -1,85 +0,0 @@
-#ifndef _H8300_SEMAPHORE_HELPER_H
-#define _H8300_SEMAPHORE_HELPER_H
-
-/*
- * SMP- and interrupt-safe semaphores helper functions.
- *
- * (C) Copyright 1996 Linus Torvalds
- *
- * based on
- * m68k version by Andreas Schwab
- */
-
-#include <linux/errno.h>
-
-/*
- * These two _must_ execute atomically wrt each other.
- */
-static inline void wake_one_more(struct semaphore * sem)
-{
- atomic_inc((atomic_t *)&sem->sleepers);
-}
-
-static inline int waking_non_zero(struct semaphore *sem)
-{
- int ret;
- unsigned long flags;
-
- spin_lock_irqsave(&semaphore_wake_lock, flags);
- ret = 0;
- if (sem->sleepers > 0) {
- sem->sleepers--;
- ret = 1;
- }
- spin_unlock_irqrestore(&semaphore_wake_lock, flags);
- return ret;
-}
-
-/*
- * waking_non_zero_interruptible:
- * 1 got the lock
- * 0 go to sleep
- * -EINTR interrupted
- */
-static inline int waking_non_zero_interruptible(struct semaphore *sem,
- struct task_struct *tsk)
-{
- int ret;
- unsigned long flags;
-
- spin_lock_irqsave(&semaphore_wake_lock, flags);
- ret = 0;
- if (sem->sleepers > 0) {
- sem->sleepers--;
- ret = 1;
- } else if (signal_pending(tsk)) {
- atomic_inc(&sem->count);
- ret = -EINTR;
- }
- spin_unlock_irqrestore(&semaphore_wake_lock, flags);
- return ret;
-}
-
-/*
- * waking_non_zero_trylock:
- * 1 failed to lock
- * 0 got the lock
- */
-static inline int waking_non_zero_trylock(struct semaphore *sem)
-{
- int ret;
- unsigned long flags;
-
- spin_lock_irqsave(&semaphore_wake_lock, flags);
- ret = 1;
- if (sem->sleepers <= 0)
- atomic_inc(&sem->count);
- else {
- sem->sleepers--;
- ret = 0;
- }
- spin_unlock_irqrestore(&semaphore_wake_lock, flags);
- return ret;
-}
-
-#endif
diff --git a/include/asm-h8300/semaphore.h b/include/asm-h8300/semaphore.h
index f3ffff8..d9b2034 100644
--- a/include/asm-h8300/semaphore.h
+++ b/include/asm-h8300/semaphore.h
@@ -1,190 +1 @@
-#ifndef _H8300_SEMAPHORE_H
-#define _H8300_SEMAPHORE_H
-
-#define RW_LOCK_BIAS 0x01000000
-
-#ifndef __ASSEMBLY__
-
-#include <linux/linkage.h>
-#include <linux/wait.h>
-#include <linux/spinlock.h>
-#include <linux/rwsem.h>
-
-#include <asm/system.h>
-#include <asm/atomic.h>
-
-/*
- * Interrupt-safe semaphores..
- *
- * (C) Copyright 1996 Linus Torvalds
- *
- * H8/300 version by Yoshinori Sato
- */
-
-
-struct semaphore {
- atomic_t count;
- int sleepers;
- wait_queue_head_t wait;
-};
-
-#define __SEMAPHORE_INITIALIZER(name, n) \
-{ \
- .count = ATOMIC_INIT(n), \
- .sleepers = 0, \
- .wait = __WAIT_QUEUE_HEAD_INITIALIZER((name).wait) \
-}
-
-#define __DECLARE_SEMAPHORE_GENERIC(name,count) \
- struct semaphore name = __SEMAPHORE_INITIALIZER(name,count)
-
-#define DECLARE_MUTEX(name) __DECLARE_SEMAPHORE_GENERIC(name,1)
-
-static inline void sema_init (struct semaphore *sem, int val)
-{
- *sem = (struct semaphore)__SEMAPHORE_INITIALIZER(*sem, val);
-}
-
-static inline void init_MUTEX (struct semaphore *sem)
-{
- sema_init(sem, 1);
-}
-
-static inline void init_MUTEX_LOCKED (struct semaphore *sem)
-{
- sema_init(sem, 0);
-}
-
-asmlinkage void __down_failed(void /* special register calling convention */);
-asmlinkage int __down_failed_interruptible(void /* params in registers */);
-asmlinkage int __down_failed_trylock(void /* params in registers */);
-asmlinkage void __up_wakeup(void /* special register calling convention */);
-
-asmlinkage void __down(struct semaphore * sem);
-asmlinkage int __down_interruptible(struct semaphore * sem);
-asmlinkage int __down_trylock(struct semaphore * sem);
-asmlinkage void __up(struct semaphore * sem);
-
-extern spinlock_t semaphore_wake_lock;
-
-/*
- * This is ugly, but we want the default case to fall through.
- * "down_failed" is a special asm handler that calls the C
- * routine that actually waits. See arch/m68k/lib/semaphore.S
- */
-static inline void down(struct semaphore * sem)
-{
- register atomic_t *count asm("er0");
-
- might_sleep();
-
- count = &(sem->count);
- __asm__ __volatile__(
- "stc ccr,r3l\n\t"
- "orc #0x80,ccr\n\t"
- "mov.l %2, er1\n\t"
- "dec.l #1,er1\n\t"
- "mov.l er1,%0\n\t"
- "bpl 1f\n\t"
- "ldc r3l,ccr\n\t"
- "mov.l %1,er0\n\t"
- "jsr @___down\n\t"
- "bra 2f\n"
- "1:\n\t"
- "ldc r3l,ccr\n"
- "2:"
- : "=m"(*count)
- : "g"(sem),"m"(*count)
- : "cc", "er1", "er2", "er3");
-}
-
-static inline int down_interruptible(struct semaphore * sem)
-{
- register atomic_t *count asm("er0");
-
- might_sleep();
-
- count = &(sem->count);
- __asm__ __volatile__(
- "stc ccr,r1l\n\t"
- "orc #0x80,ccr\n\t"
- "mov.l %3, er2\n\t"
- "dec.l #1,er2\n\t"
- "mov.l er2,%1\n\t"
- "bpl 1f\n\t"
- "ldc r1l,ccr\n\t"
- "mov.l %2,er0\n\t"
- "jsr @___down_interruptible\n\t"
- "bra 2f\n"
- "1:\n\t"
- "ldc r1l,ccr\n\t"
- "sub.l %0,%0\n\t"
- "2:\n\t"
- : "=r" (count),"=m" (*count)
- : "g"(sem),"m"(*count)
- : "cc", "er1", "er2", "er3");
- return (int)count;
-}
-
-static inline int down_trylock(struct semaphore * sem)
-{
- register atomic_t *count asm("er0");
-
- count = &(sem->count);
- __asm__ __volatile__(
- "stc ccr,r3l\n\t"
- "orc #0x80,ccr\n\t"
- "mov.l %3,er2\n\t"
- "dec.l #1,er2\n\t"
- "mov.l er2,%0\n\t"
- "bpl 1f\n\t"
- "ldc r3l,ccr\n\t"
- "jmp @3f\n\t"
- LOCK_SECTION_START(".align 2\n\t")
- "3:\n\t"
- "mov.l %2,er0\n\t"
- "jsr @___down_trylock\n\t"
- "jmp @2f\n\t"
- LOCK_SECTION_END
- "1:\n\t"
- "ldc r3l,ccr\n\t"
- "sub.l %1,%1\n"
- "2:"
- : "=m" (*count),"=r"(count)
- : "g"(sem),"m"(*count)
- : "cc", "er1","er2", "er3");
- return (int)count;
-}
-
-/*
- * Note! This is subtle. We jump to wake people up only if
- * the semaphore was negative (== somebody was waiting on it).
- * The default case (no contention) will result in NO
- * jumps for both down() and up().
- */
-static inline void up(struct semaphore * sem)
-{
- register atomic_t *count asm("er0");
-
- count = &(sem->count);
- __asm__ __volatile__(
- "stc ccr,r3l\n\t"
- "orc #0x80,ccr\n\t"
- "mov.l %2,er1\n\t"
- "inc.l #1,er1\n\t"
- "mov.l er1,%0\n\t"
- "ldc r3l,ccr\n\t"
- "sub.l er2,er2\n\t"
- "cmp.l er2,er1\n\t"
- "bgt 1f\n\t"
- "mov.l %1,er0\n\t"
- "jsr @___up\n"
- "1:"
- : "=m"(*count)
- : "g"(sem),"m"(*count)
- : "cc", "er1", "er2", "er3");
-}
-
-#endif /* __ASSEMBLY__ */
-
-#endif
+#include <linux/semaphore.h>
diff --git a/include/asm-ia64/semaphore.h b/include/asm-ia64/semaphore.h
index d8393d1..d9b2034 100644
--- a/include/asm-ia64/semaphore.h
+++ b/include/asm-ia64/semaphore.h
@@ -1,99 +1 @@
-#ifndef _ASM_IA64_SEMAPHORE_H
-#define _ASM_IA64_SEMAPHORE_H
-
-/*
- * Copyright (C) 1998-2000 Hewlett-Packard Co
- * Copyright (C) 1998-2000 David Mosberger-Tang <davidm@hpl.hp.com>
- */
-
-#include <linux/wait.h>
-#include <linux/rwsem.h>
-
-#include <asm/atomic.h>
-
-struct semaphore {
- atomic_t count;
- int sleepers;
- wait_queue_head_t wait;
-};
-
-#define __SEMAPHORE_INITIALIZER(name, n) \
-{ \
- .count = ATOMIC_INIT(n), \
- .sleepers = 0, \
- .wait = __WAIT_QUEUE_HEAD_INITIALIZER((name).wait) \
-}
-
-#define __DECLARE_SEMAPHORE_GENERIC(name,count) \
- struct semaphore name = __SEMAPHORE_INITIALIZER(name, count)
-
-#define DECLARE_MUTEX(name) __DECLARE_SEMAPHORE_GENERIC(name, 1)
-
-static inline void
-sema_init (struct semaphore *sem, int val)
-{
- *sem = (struct semaphore) __SEMAPHORE_INITIALIZER(*sem, val);
-}
-
-static inline void
-init_MUTEX (struct semaphore *sem)
-{
- sema_init(sem, 1);
-}
-
-static inline void
-init_MUTEX_LOCKED (struct semaphore *sem)
-{
- sema_init(sem, 0);
-}
-
-extern void __down (struct semaphore * sem);
-extern int __down_interruptible (struct semaphore * sem);
-extern int __down_trylock (struct semaphore * sem);
-extern void __up (struct semaphore * sem);
-
-/*
- * Atomically decrement the semaphore's count. If it goes negative,
- * block the calling thread in the TASK_UNINTERRUPTIBLE state.
- */
-static inline void
-down (struct semaphore *sem)
-{
- might_sleep();
- if (ia64_fetchadd(-1, &sem->count.counter, acq) < 1)
- __down(sem);
-}
-
-/*
- * Atomically decrement the semaphore's count. If it goes negative,
- * block the calling thread in the TASK_INTERRUPTIBLE state.
- */
-static inline int
-down_interruptible (struct semaphore * sem)
-{
- int ret = 0;
-
- might_sleep();
- if (ia64_fetchadd(-1, &sem->count.counter, acq) < 1)
- ret = __down_interruptible(sem);
- return ret;
-}
-
-static inline int
-down_trylock (struct semaphore *sem)
-{
- int ret = 0;
-
- if (ia64_fetchadd(-1, &sem->count.counter, acq) < 1)
- ret = __down_trylock(sem);
- return ret;
-}
-
-static inline void
-up (struct semaphore * sem)
-{
- if (ia64_fetchadd(1, &sem->count.counter, rel) <= -1)
- __up(sem);
-}
-
-#endif /* _ASM_IA64_SEMAPHORE_H */
+#include <linux/semaphore.h>
diff --git a/include/asm-m32r/semaphore.h b/include/asm-m32r/semaphore.h
index b5bf95a..d9b2034 100644
--- a/include/asm-m32r/semaphore.h
+++ b/include/asm-m32r/semaphore.h
@@ -1,144 +1 @@
-#ifndef _ASM_M32R_SEMAPHORE_H
-#define _ASM_M32R_SEMAPHORE_H
-
-#include <linux/linkage.h>
-
-#ifdef __KERNEL__
-
-/*
- * SMP- and interrupt-safe semaphores..
- *
- * Copyright (C) 1996 Linus Torvalds
- * Copyright (C) 2004, 2006 Hirokazu Takata <takata at linux-m32r.org>
- */
-
-#include <linux/wait.h>
-#include <linux/rwsem.h>
-#include <asm/assembler.h>
-#include <asm/system.h>
-#include <asm/atomic.h>
-
-struct semaphore {
- atomic_t count;
- int sleepers;
- wait_queue_head_t wait;
-};
-
-#define __SEMAPHORE_INITIALIZER(name, n) \
-{ \
- .count = ATOMIC_INIT(n), \
- .sleepers = 0, \
- .wait = __WAIT_QUEUE_HEAD_INITIALIZER((name).wait) \
-}
-
-#define __DECLARE_SEMAPHORE_GENERIC(name,count) \
- struct semaphore name = __SEMAPHORE_INITIALIZER(name,count)
-
-#define DECLARE_MUTEX(name) __DECLARE_SEMAPHORE_GENERIC(name,1)
-
-static inline void sema_init (struct semaphore *sem, int val)
-{
-/*
- * *sem = (struct semaphore)__SEMAPHORE_INITIALIZER((*sem),val);
- *
- * i'd rather use the more flexible initialization above, but sadly
- * GCC 2.7.2.3 emits a bogus warning. EGCS doesnt. Oh well.
- */
- atomic_set(&sem->count, val);
- sem->sleepers = 0;
- init_waitqueue_head(&sem->wait);
-}
-
-static inline void init_MUTEX (struct semaphore *sem)
-{
- sema_init(sem, 1);
-}
-
-static inline void init_MUTEX_LOCKED (struct semaphore *sem)
-{
- sema_init(sem, 0);
-}
-
-asmlinkage void __down_failed(void /* special register calling convention */);
-asmlinkage int __down_failed_interruptible(void /* params in registers */);
-asmlinkage int __down_failed_trylock(void /* params in registers */);
-asmlinkage void __up_wakeup(void /* special register calling convention */);
-
-asmlinkage void __down(struct semaphore * sem);
-asmlinkage int __down_interruptible(struct semaphore * sem);
-asmlinkage int __down_trylock(struct semaphore * sem);
-asmlinkage void __up(struct semaphore * sem);
-
-/*
- * Atomically decrement the semaphore's count. If it goes negative,
- * block the calling thread in the TASK_UNINTERRUPTIBLE state.
- */
-static inline void down(struct semaphore * sem)
-{
- might_sleep();
- if (unlikely(atomic_dec_return(&sem->count) < 0))
- __down(sem);
-}
-
-/*
- * Interruptible try to acquire a semaphore. If we obtained
- * it, return zero. If we were interrupted, returns -EINTR
- */
-static inline int down_interruptible(struct semaphore * sem)
-{
- int result = 0;
-
- might_sleep();
- if (unlikely(atomic_dec_return(&sem->count) < 0))
- result = __down_interruptible(sem);
-
- return result;
-}
-
-/*
- * Non-blockingly attempt to down() a semaphore.
- * Returns zero if we acquired it
- */
-static inline int down_trylock(struct semaphore * sem)
-{
- unsigned long flags;
- long count;
- int result = 0;
-
- local_irq_save(flags);
- __asm__ __volatile__ (
- "# down_trylock \n\t"
- DCACHE_CLEAR("%0", "r4", "%1")
- M32R_LOCK" %0, @%1; \n\t"
- "addi %0, #-1; \n\t"
- M32R_UNLOCK" %0, @%1; \n\t"
- : "=&r" (count)
- : "r" (&sem->count)
- : "memory"
-#ifdef CONFIG_CHIP_M32700_TS1
- , "r4"
-#endif /* CONFIG_CHIP_M32700_TS1 */
- );
- local_irq_restore(flags);
-
- if (unlikely(count < 0))
- result = __down_trylock(sem);
-
- return result;
-}
-
-/*
- * Note! This is subtle. We jump to wake people up only if
- * the semaphore was negative (== somebody was waiting on it).
- * The default case (no contention) will result in NO
- * jumps for both down() and up().
- */
-static inline void up(struct semaphore * sem)
-{
- if (unlikely(atomic_inc_return(&sem->count) <= 0))
- __up(sem);
-}
-
-#endif /* __KERNEL__ */
-
-#endif /* _ASM_M32R_SEMAPHORE_H */
+#include <linux/semaphore.h>
diff --git a/include/asm-m68k/semaphore-helper.h b/include/asm-m68k/semaphore-helper.h
deleted file mode 100644
index eef30ba..0000000
--- a/include/asm-m68k/semaphore-helper.h
+++ /dev/null
@@ -1,142 +0,0 @@
-#ifndef _M68K_SEMAPHORE_HELPER_H
-#define _M68K_SEMAPHORE_HELPER_H
-
-/*
- * SMP- and interrupt-safe semaphores helper functions.
- *
- * (C) Copyright 1996 Linus Torvalds
- *
- * m68k version by Andreas Schwab
- */
-
-#include <linux/errno.h>
-
-/*
- * These two _must_ execute atomically wrt each other.
- */
-static inline void wake_one_more(struct semaphore * sem)
-{
- atomic_inc(&sem->waking);
-}
-
-#ifndef CONFIG_RMW_INSNS
-extern spinlock_t semaphore_wake_lock;
-#endif
-
-static inline int waking_non_zero(struct semaphore *sem)
-{
- int ret;
-#ifndef CONFIG_RMW_INSNS
- unsigned long flags;
-
- spin_lock_irqsave(&semaphore_wake_lock, flags);
- ret = 0;
- if (atomic_read(&sem->waking) > 0) {
- atomic_dec(&sem->waking);
- ret = 1;
- }
- spin_unlock_irqrestore(&semaphore_wake_lock, flags);
-#else
- int tmp1, tmp2;
-
- __asm__ __volatile__
- ("1: movel %1,%2\n"
- " jle 2f\n"
- " subql #1,%2\n"
- " casl %1,%2,%3\n"
- " jne 1b\n"
- " moveq #1,%0\n"
- "2:"
- : "=d" (ret), "=d" (tmp1), "=d" (tmp2)
- : "m" (sem->waking), "0" (0), "1" (sem->waking));
-#endif
-
- return ret;
-}
-
-/*
- * waking_non_zero_interruptible:
- * 1 got the lock
- * 0 go to sleep
- * -EINTR interrupted
- */
-static inline int waking_non_zero_interruptible(struct semaphore *sem,
- struct task_struct *tsk)
-{
- int ret;
-#ifndef CONFIG_RMW_INSNS
- unsigned long flags;
-
- spin_lock_irqsave(&semaphore_wake_lock, flags);
- ret = 0;
- if (atomic_read(&sem->waking) > 0) {
- atomic_dec(&sem->waking);
- ret = 1;
- } else if (signal_pending(tsk)) {
- atomic_inc(&sem->count);
- ret = -EINTR;
- }
- spin_unlock_irqrestore(&semaphore_wake_lock, flags);
-#else
- int tmp1, tmp2;
-
- __asm__ __volatile__
- ("1: movel %1,%2\n"
- " jle 2f\n"
- " subql #1,%2\n"
- " casl %1,%2,%3\n"
- " jne 1b\n"
- " moveq #1,%0\n"
- " jra %a4\n"
- "2:"
- : "=d" (ret), "=d" (tmp1), "=d" (tmp2)
- : "m" (sem->waking), "i" (&&next), "0" (0), "1" (sem->waking));
- if (signal_pending(tsk)) {
- atomic_inc(&sem->count);
- ret = -EINTR;
- }
-next:
-#endif
-
- return ret;
-}
-
-/*
- * waking_non_zero_trylock:
- * 1 failed to lock
- * 0 got the lock
- */
-static inline int waking_non_zero_trylock(struct semaphore *sem)
-{
- int ret;
-#ifndef CONFIG_RMW_INSNS
- unsigned long flags;
-
- spin_lock_irqsave(&semaphore_wake_lock, flags);
- ret = 1;
- if (atomic_read(&sem->waking) > 0) {
- atomic_dec(&sem->waking);
- ret = 0;
- } else
- atomic_inc(&sem->count);
- spin_unlock_irqrestore(&semaphore_wake_lock, flags);
-#else
- int tmp1, tmp2;
-
- __asm__ __volatile__
- ("1: movel %1,%2\n"
- " jle 2f\n"
- " subql #1,%2\n"
- " casl %1,%2,%3\n"
- " jne 1b\n"
- " moveq #0,%0\n"
- "2:"
- : "=d" (ret), "=d" (tmp1), "=d" (tmp2)
- : "m" (sem->waking), "0" (1), "1" (sem->waking));
- if (ret)
- atomic_inc(&sem->count);
-#endif
- return ret;
-}
-
-#endif
diff --git a/include/asm-m68k/semaphore.h b/include/asm-m68k/semaphore.h
index 64d6b11..d9b2034 100644
--- a/include/asm-m68k/semaphore.h
+++ b/include/asm-m68k/semaphore.h
@@ -1,163 +1 @@
-#ifndef _M68K_SEMAPHORE_H
-#define _M68K_SEMAPHORE_H
-
-#define RW_LOCK_BIAS 0x01000000
-
-#ifndef __ASSEMBLY__
-
-#include <linux/linkage.h>
-#include <linux/wait.h>
-#include <linux/spinlock.h>
-#include <linux/rwsem.h>
-#include <linux/stringify.h>
-
-#include <asm/system.h>
-#include <asm/atomic.h>
-
-/*
- * Interrupt-safe semaphores..
- *
- * (C) Copyright 1996 Linus Torvalds
- *
- * m68k version by Andreas Schwab
- */
-
-
-struct semaphore {
- atomic_t count;
- atomic_t waking;
- wait_queue_head_t wait;
-};
-
-#define __SEMAPHORE_INITIALIZER(name, n) \
-{ \
- .count = ATOMIC_INIT(n), \
- .waking = ATOMIC_INIT(0), \
- .wait = __WAIT_QUEUE_HEAD_INITIALIZER((name).wait) \
-}
-
-#define __DECLARE_SEMAPHORE_GENERIC(name,count) \
- struct semaphore name = __SEMAPHORE_INITIALIZER(name,count)
-
-#define DECLARE_MUTEX(name) __DECLARE_SEMAPHORE_GENERIC(name,1)
-
-static inline void sema_init(struct semaphore *sem, int val)
-{
- *sem = (struct semaphore)__SEMAPHORE_INITIALIZER(*sem, val);
-}
-
-static inline void init_MUTEX (struct semaphore *sem)
-{
- sema_init(sem, 1);
-}
-
-static inline void init_MUTEX_LOCKED (struct semaphore *sem)
-{
- sema_init(sem, 0);
-}
-
-asmlinkage void __down_failed(void /* special register calling convention */);
-asmlinkage int __down_failed_interruptible(void /* params in registers */);
-asmlinkage int __down_failed_trylock(void /* params in registers */);
-asmlinkage void __up_wakeup(void /* special register calling convention */);
-
-asmlinkage void __down(struct semaphore * sem);
-asmlinkage int __down_interruptible(struct semaphore * sem);
-asmlinkage int __down_trylock(struct semaphore * sem);
-asmlinkage void __up(struct semaphore * sem);
-
-/*
- * This is ugly, but we want the default case to fall through.
- * "down_failed" is a special asm handler that calls the C
- * routine that actually waits. See arch/m68k/lib/semaphore.S
- */
-static inline void down(struct semaphore *sem)
-{
- register struct semaphore *sem1 __asm__ ("%a1") = sem;
-
- might_sleep();
- __asm__ __volatile__(
- "| atomic down operation\n\t"
- "subql #1,%0@\n\t"
- "jmi 2f\n\t"
- "1:\n"
- LOCK_SECTION_START(".even\n\t")
- "2:\tpea 1b\n\t"
- "jbra __down_failed\n"
- LOCK_SECTION_END
- : /* no outputs */
- : "a" (sem1)
- : "memory");
-}
-
-static inline int down_interruptible(struct semaphore *sem)
-{
- register struct semaphore *sem1 __asm__ ("%a1") = sem;
- register int result __asm__ ("%d0");
-
- might_sleep();
- __asm__ __volatile__(
- "| atomic interruptible down operation\n\t"
- "subql #1,%1@\n\t"
- "jmi 2f\n\t"
- "clrl %0\n"
- "1:\n"
- LOCK_SECTION_START(".even\n\t")
- "2:\tpea 1b\n\t"
- "jbra __down_failed_interruptible\n"
- LOCK_SECTION_END
- : "=d" (result)
- : "a" (sem1)
- : "memory");
- return result;
-}
-
-static inline int down_trylock(struct semaphore *sem)
-{
- register struct semaphore *sem1 __asm__ ("%a1") = sem;
- register int result __asm__ ("%d0");
-
- __asm__ __volatile__(
- "| atomic down trylock operation\n\t"
- "subql #1,%1@\n\t"
- "jmi 2f\n\t"
- "clrl %0\n"
- "1:\n"
- LOCK_SECTION_START(".even\n\t")
- "2:\tpea 1b\n\t"
- "jbra __down_failed_trylock\n"
- LOCK_SECTION_END
- : "=d" (result)
- : "a" (sem1)
- : "memory");
- return result;
-}
-
-/*
- * Note! This is subtle. We jump to wake people up only if
- * the semaphore was negative (== somebody was waiting on it).
- * The default case (no contention) will result in NO
- * jumps for both down() and up().
- */
-static inline void up(struct semaphore *sem)
-{
- register struct semaphore *sem1 __asm__ ("%a1") = sem;
-
- __asm__ __volatile__(
- "| atomic up operation\n\t"
- "addql #1,%0@\n\t"
- "jle 2f\n"
- "1:\n"
- LOCK_SECTION_START(".even\n\t")
- "2:\t"
- "pea 1b\n\t"
- "jbra __up_wakeup\n"
- LOCK_SECTION_END
- : /* no outputs */
- : "a" (sem1)
- : "memory");
-}
-
-#endif /* __ASSEMBLY__ */
-
-#endif
+#include <linux/semaphore.h>
diff --git a/include/asm-m68knommu/semaphore-helper.h b/include/asm-m68knommu/semaphore-helper.h
deleted file mode 100644
index 43da7bc..0000000
--- a/include/asm-m68knommu/semaphore-helper.h
+++ /dev/null
@@ -1,82 +0,0 @@
-#ifndef _M68K_SEMAPHORE_HELPER_H
-#define _M68K_SEMAPHORE_HELPER_H
-
-/*
- * SMP- and interrupt-safe semaphores helper functions.
- *
- * (C) Copyright 1996 Linus Torvalds
- *
- * m68k version by Andreas Schwab
- */
-
-
-/*
- * These two _must_ execute atomically wrt each other.
- */
-static inline void wake_one_more(struct semaphore * sem)
-{
- atomic_inc(&sem->waking);
-}
-
-static inline int waking_non_zero(struct semaphore *sem)
-{
- int ret;
- unsigned long flags;
-
- spin_lock_irqsave(&semaphore_wake_lock, flags);
- ret = 0;
- if (atomic_read(&sem->waking) > 0) {
- atomic_dec(&sem->waking);
- ret = 1;
- }
- spin_unlock_irqrestore(&semaphore_wake_lock, flags);
- return ret;
-}
-
-/*
- * waking_non_zero_interruptible:
- * 1 got the lock
- * 0 go to sleep
- * -EINTR interrupted
- */
-static inline int waking_non_zero_interruptible(struct semaphore *sem,
- struct task_struct *tsk)
-{
- int ret;
- unsigned long flags;
-
- spin_lock_irqsave(&semaphore_wake_lock, flags);
- ret = 0;
- if (atomic_read(&sem->waking) > 0) {
- atomic_dec(&sem->waking);
- ret = 1;
- } else if (signal_pending(tsk)) {
- atomic_inc(&sem->count);
- ret = -EINTR;
- }
- spin_unlock_irqrestore(&semaphore_wake_lock, flags);
- return ret;
-}
-
-/*
- * waking_non_zero_trylock:
- * 1 failed to lock
- * 0 got the lock
- */
-static inline int waking_non_zero_trylock(struct semaphore *sem)
-{
- int ret;
- unsigned long flags;
-
- spin_lock_irqsave(&semaphore_wake_lock, flags);
- ret = 1;
- if (atomic_read(&sem->waking) > 0) {
- atomic_dec(&sem->waking);
- ret = 0;
- } else
- atomic_inc(&sem->count);
- spin_unlock_irqrestore(&semaphore_wake_lock, flags);
- return ret;
-}
-
-#endif
diff --git a/include/asm-m68knommu/semaphore.h b/include/asm-m68knommu/semaphore.h
index 5779eb6..d9b2034 100644
--- a/include/asm-m68knommu/semaphore.h
+++ b/include/asm-m68knommu/semaphore.h
@@ -1,153 +1 @@
-#ifndef _M68K_SEMAPHORE_H
-#define _M68K_SEMAPHORE_H
-
-#define RW_LOCK_BIAS 0x01000000
-
-#ifndef __ASSEMBLY__
-
-#include <linux/linkage.h>
-#include <linux/wait.h>
-#include <linux/spinlock.h>
-#include <linux/rwsem.h>
-
-#include <asm/system.h>
-#include <asm/atomic.h>
-
-/*
- * Interrupt-safe semaphores..
- *
- * (C) Copyright 1996 Linus Torvalds
- *
- * m68k version by Andreas Schwab
- */
-
-
-struct semaphore {
- atomic_t count;
- atomic_t waking;
- wait_queue_head_t wait;
-};
-
-#define __SEMAPHORE_INITIALIZER(name, n) \
-{ \
- .count = ATOMIC_INIT(n), \
- .waking = ATOMIC_INIT(0), \
- .wait = __WAIT_QUEUE_HEAD_INITIALIZER((name).wait) \
-}
-
-#define __DECLARE_SEMAPHORE_GENERIC(name,count) \
- struct semaphore name = __SEMAPHORE_INITIALIZER(name,count)
-
-#define DECLARE_MUTEX(name) __DECLARE_SEMAPHORE_GENERIC(name,1)
-
-static inline void sema_init (struct semaphore *sem, int val)
-{
- *sem = (struct semaphore)__SEMAPHORE_INITIALIZER(*sem, val);
-}
-
-static inline void init_MUTEX (struct semaphore *sem)
-{
- sema_init(sem, 1);
-}
-
-static inline void init_MUTEX_LOCKED (struct semaphore *sem)
-{
- sema_init(sem, 0);
-}
-
-asmlinkage void __down_failed(void /* special register calling convention */);
-asmlinkage int __down_failed_interruptible(void /* params in registers */);
-asmlinkage int __down_failed_trylock(void /* params in registers */);
-asmlinkage void __up_wakeup(void /* special register calling convention */);
-
-asmlinkage void __down(struct semaphore * sem);
-asmlinkage int __down_interruptible(struct semaphore * sem);
-asmlinkage int __down_trylock(struct semaphore * sem);
-asmlinkage void __up(struct semaphore * sem);
-
-extern spinlock_t semaphore_wake_lock;
-
-/*
- * This is ugly, but we want the default case to fall through.
- * "down_failed" is a special asm handler that calls the C
- * routine that actually waits. See arch/m68k/lib/semaphore.S
- */
-static inline void down(struct semaphore * sem)
-{
- might_sleep();
- __asm__ __volatile__(
- "| atomic down operation\n\t"
- "movel %0, %%a1\n\t"
- "lea %%pc@(1f), %%a0\n\t"
- "subql #1, %%a1@\n\t"
- "jmi __down_failed\n"
- "1:"
- : /* no outputs */
- : "g" (sem)
- : "cc", "%a0", "%a1", "memory");
-}
-
-static inline int down_interruptible(struct semaphore * sem)
-{
- int ret;
-
- might_sleep();
- __asm__ __volatile__(
- "| atomic down operation\n\t"
- "movel %1, %%a1\n\t"
- "lea %%pc@(1f), %%a0\n\t"
- "subql #1, %%a1@\n\t"
- "jmi __down_failed_interruptible\n\t"
- "clrl %%d0\n"
- "1: movel %%d0, %0\n"
- : "=d" (ret)
- : "g" (sem)
- : "cc", "%d0", "%a0", "%a1", "memory");
- return(ret);
-}
-
-static inline int down_trylock(struct semaphore * sem)
-{
- register struct semaphore *sem1 __asm__ ("%a1") = sem;
- register int result __asm__ ("%d0");
-
- __asm__ __volatile__(
- "| atomic down trylock operation\n\t"
- "subql #1,%1@\n\t"
- "jmi 2f\n\t"
- "clrl %0\n"
- "1:\n"
- ".section .text.lock,\"ax\"\n"
- ".even\n"
- "2:\tpea 1b\n\t"
- "jbra __down_failed_trylock\n"
- ".previous"
- : "=d" (result)
- : "a" (sem1)
- : "memory");
- return result;
-}
-
-/*
- * Note! This is subtle. We jump to wake people up only if
- * the semaphore was negative (== somebody was waiting on it).
- * The default case (no contention) will result in NO
- * jumps for both down() and up().
- */
-static inline void up(struct semaphore * sem)
-{
- __asm__ __volatile__(
- "| atomic up operation\n\t"
- "movel %0, %%a1\n\t"
- "lea %%pc@(1f), %%a0\n\t"
- "addql #1, %%a1@\n\t"
- "jle __up_wakeup\n"
- "1:"
- : /* no outputs */
- : "g" (sem)
- : "cc", "%a0", "%a1", "memory");
-}
-
-#endif /* __ASSEMBLY__ */
-
-#endif
+#include <linux/semaphore.h>
diff --git a/include/asm-mips/semaphore.h b/include/asm-mips/semaphore.h
index fdf8042..d9b2034 100644
--- a/include/asm-mips/semaphore.h
+++ b/include/asm-mips/semaphore.h
@@ -1,108 +1 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 1996 Linus Torvalds
- * Copyright (C) 1998, 99, 2000, 01, 04 Ralf Baechle
- * Copyright (C) 1999, 2000, 01 Silicon Graphics, Inc.
- * Copyright (C) 2000, 01 MIPS Technologies, Inc.
- *
- * In all honesty, little of the old MIPS code left - the PPC64 variant was
- * just looking nice and portable so I ripped it. Credits to whoever wrote
- * it.
- */
-#ifndef __ASM_SEMAPHORE_H
-#define __ASM_SEMAPHORE_H
-
-/*
- * Remove spinlock-based RW semaphores; RW semaphore definitions are
- * now in rwsem.h and we use the generic lib/rwsem.c implementation.
- * Rework semaphores to use atomic_dec_if_positive.
- * -- Paul Mackerras (paulus@samba.org)
- */
-
-#ifdef __KERNEL__
-
-#include <asm/atomic.h>
-#include <asm/system.h>
-#include <linux/wait.h>
-#include <linux/rwsem.h>
-
-struct semaphore {
- /*
- * Note that any negative value of count is equivalent to 0,
- * but additionally indicates that some process(es) might be
- * sleeping on `wait'.
- */
- atomic_t count;
- wait_queue_head_t wait;
-};
-
-#define __SEMAPHORE_INITIALIZER(name, n) \
-{ \
- .count = ATOMIC_INIT(n), \
- .wait = __WAIT_QUEUE_HEAD_INITIALIZER((name).wait) \
-}
-
-#define __DECLARE_SEMAPHORE_GENERIC(name, count) \
- struct semaphore name = __SEMAPHORE_INITIALIZER(name, count)
-
-#define DECLARE_MUTEX(name) __DECLARE_SEMAPHORE_GENERIC(name, 1)
-
-static inline void sema_init(struct semaphore *sem, int val)
-{
- atomic_set(&sem->count, val);
- init_waitqueue_head(&sem->wait);
-}
-
-static inline void init_MUTEX(struct semaphore *sem)
-{
- sema_init(sem, 1);
-}
-
-static inline void init_MUTEX_LOCKED(struct semaphore *sem)
-{
- sema_init(sem, 0);
-}
-
-extern void __down(struct semaphore * sem);
-extern int __down_interruptible(struct semaphore * sem);
-extern void __up(struct semaphore * sem);
-
-static inline void down(struct semaphore * sem)
-{
- might_sleep();
-
- /*
- * Try to get the semaphore, take the slow path if we fail.
- */
- if (unlikely(atomic_dec_return(&sem->count) < 0))
- __down(sem);
-}
-
-static inline int down_interruptible(struct semaphore * sem)
-{
- int ret = 0;
-
- might_sleep();
-
- if (unlikely(atomic_dec_return(&sem->count) < 0))
- ret = __down_interruptible(sem);
- return ret;
-}
-
-static inline int down_trylock(struct semaphore * sem)
-{
- return atomic_dec_if_positive(&sem->count) < 0;
-}
-
-static inline void up(struct semaphore * sem)
-{
- if (unlikely(atomic_inc_return(&sem->count) <= 0))
- __up(sem);
-}
-
-#endif /* __KERNEL__ */
-
-#endif /* __ASM_SEMAPHORE_H */
+#include <linux/semaphore.h>
diff --git a/include/asm-mn10300/semaphore.h b/include/asm-mn10300/semaphore.h
index 5a9e1ad..d9b2034 100644
--- a/include/asm-mn10300/semaphore.h
+++ b/include/asm-mn10300/semaphore.h
@@ -1,169 +1 @@
-/* MN10300 Semaphores
- *
- * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
- */
-#ifndef _ASM_SEMAPHORE_H
-#define _ASM_SEMAPHORE_H
-
-#ifndef __ASSEMBLY__
-
-#include <linux/linkage.h>
-#include <linux/wait.h>
-#include <linux/spinlock.h>
-#include <linux/rwsem.h>
-
-#define SEMAPHORE_DEBUG 0
-
-/*
- * the semaphore definition
- * - if count is >0 then there are tokens available on the semaphore for down
- * to collect
- * - if count is <=0 then there are no spare tokens, and anyone that wants one
- * must wait
- * - if wait_list is not empty, then there are processes waiting for the
- * semaphore
- */
-struct semaphore {
- atomic_t count; /* it's not really atomic, it's
- * just that certain modules
- * expect to be able to access
- * it directly */
- spinlock_t wait_lock;
- struct list_head wait_list;
-#if SEMAPHORE_DEBUG
- unsigned __magic;
-#endif
-};
-
-#if SEMAPHORE_DEBUG
-# define __SEM_DEBUG_INIT(name) , (long)&(name).__magic
-#else
-# define __SEM_DEBUG_INIT(name)
-#endif
-
-
-#define __SEMAPHORE_INITIALIZER(name, init_count) \
-{ \
- .count = ATOMIC_INIT(init_count), \
- .wait_lock = __SPIN_LOCK_UNLOCKED((name).wait_lock), \
- .wait_list = LIST_HEAD_INIT((name).wait_list) \
- __SEM_DEBUG_INIT(name) \
-}
-
-#define __DECLARE_SEMAPHORE_GENERIC(name,count) \
- struct semaphore name = __SEMAPHORE_INITIALIZER(name, count)
-
-#define DECLARE_MUTEX(name) __DECLARE_SEMAPHORE_GENERIC(name, 1)
-#define DECLARE_MUTEX_LOCKED(name) __DECLARE_SEMAPHORE_GENERIC(name, 0)
-
-static inline void sema_init(struct semaphore *sem, int val)
-{
- *sem = (struct semaphore) __SEMAPHORE_INITIALIZER(*sem, val);
-}
-
-static inline void init_MUTEX(struct semaphore *sem)
-{
- sema_init(sem, 1);
-}
-
-static inline void init_MUTEX_LOCKED(struct semaphore *sem)
-{
- sema_init(sem, 0);
-}
-
-extern void __down(struct semaphore *sem, unsigned long flags);
-extern int __down_interruptible(struct semaphore *sem, unsigned long flags);
-extern void __up(struct semaphore *sem);
-
-static inline void down(struct semaphore *sem)
-{
- unsigned long flags;
- int count;
-
-#if SEMAPHORE_DEBUG
- CHECK_MAGIC(sem->__magic);
-#endif
-
- spin_lock_irqsave(&sem->wait_lock, flags);
- count = atomic_read(&sem->count);
- if (likely(count > 0)) {
- atomic_set(&sem->count, count - 1);
- spin_unlock_irqrestore(&sem->wait_lock, flags);
- } else {
- __down(sem, flags);
- }
-}
-
-static inline int down_interruptible(struct semaphore *sem)
-{
- unsigned long flags;
- int count, ret = 0;
-
-#if SEMAPHORE_DEBUG
- CHECK_MAGIC(sem->__magic);
-#endif
-
- spin_lock_irqsave(&sem->wait_lock, flags);
- count = atomic_read(&sem->count);
- if (likely(count > 0)) {
- atomic_set(&sem->count, count - 1);
- spin_unlock_irqrestore(&sem->wait_lock, flags);
- } else {
- ret = __down_interruptible(sem, flags);
- }
- return ret;
-}
-
-/*
- * non-blockingly attempt to down() a semaphore.
- * - returns zero if we acquired it
- */
-static inline int down_trylock(struct semaphore *sem)
-{
- unsigned long flags;
- int count, success = 0;
-
-#if SEMAPHORE_DEBUG
- CHECK_MAGIC(sem->__magic);
-#endif
-
- spin_lock_irqsave(&sem->wait_lock, flags);
- count = atomic_read(&sem->count);
- if (likely(count > 0)) {
- atomic_set(&sem->count, count - 1);
- success = 1;
- }
- spin_unlock_irqrestore(&sem->wait_lock, flags);
- return !success;
-}
-
-static inline void up(struct semaphore *sem)
-{
- unsigned long flags;
-
-#if SEMAPHORE_DEBUG
- CHECK_MAGIC(sem->__magic);
-#endif
-
- spin_lock_irqsave(&sem->wait_lock, flags);
- if (!list_empty(&sem->wait_list))
- __up(sem);
- else
- atomic_set(&sem->count, atomic_read(&sem->count) + 1);
- spin_unlock_irqrestore(&sem->wait_lock, flags);
-}
-
-static inline int sem_getcount(struct semaphore *sem)
-{
- return atomic_read(&sem->count);
-}
-
-#endif /* __ASSEMBLY__ */
-
-#endif
+#include <linux/semaphore.h>
diff --git a/include/asm-parisc/semaphore-helper.h b/include/asm-parisc/semaphore-helper.h
deleted file mode 100644
index 387f7c1..0000000
--- a/include/asm-parisc/semaphore-helper.h
+++ /dev/null
@@ -1,89 +0,0 @@
-#ifndef _ASM_PARISC_SEMAPHORE_HELPER_H
-#define _ASM_PARISC_SEMAPHORE_HELPER_H
-
-/*
- * SMP- and interrupt-safe semaphores helper functions.
- *
- * (C) Copyright 1996 Linus Torvalds
- * (C) Copyright 1999 Andrea Arcangeli
- */
-
-/*
- * These two _must_ execute atomically wrt each other.
- *
- * This is trivially done with load_locked/store_cond,
- * which we have. Let the rest of the losers suck eggs.
- */
-static __inline__ void wake_one_more(struct semaphore * sem)
-{
- atomic_inc((atomic_t *)&sem->waking);
-}
-
-static __inline__ int waking_non_zero(struct semaphore *sem)
-{
- unsigned long flags;
- int ret = 0;
-
- spin_lock_irqsave(&semaphore_wake_lock, flags);
- if (sem->waking > 0) {
- sem->waking--;
- ret = 1;
- }
- spin_unlock_irqrestore(&semaphore_wake_lock, flags);
- return ret;
-}
-
-/*
- * waking_non_zero_interruptible:
- * 1 got the lock
- * 0 go to sleep
- * -EINTR interrupted
- *
- * We must undo the sem->count down_interruptible() increment while we are
- * protected by the spinlock in order to make atomic this atomic_inc() with the
- * atomic_read() in wake_one_more(), otherwise we can race. -arca
- */
-static __inline__ int waking_non_zero_interruptible(struct semaphore *sem,
- struct task_struct *tsk)
-{
- unsigned long flags;
- int ret = 0;
-
- spin_lock_irqsave(&semaphore_wake_lock, flags);
- if (sem->waking > 0) {
- sem->waking--;
- ret = 1;
- } else if (signal_pending(tsk)) {
- atomic_inc(&sem->count);
- ret = -EINTR;
- }
- spin_unlock_irqrestore(&semaphore_wake_lock, flags);
- return ret;
-}
-
-/*
- * waking_non_zero_trylock:
- * 1 failed to lock
- * 0 got the lock
- *
- * We must undo the sem->count down_trylock() increment while we are
- * protected by the spinlock in order to make atomic this atomic_inc() with the
- * atomic_read() in wake_one_more(), otherwise we can race. -arca
- */
-static __inline__ int waking_non_zero_trylock(struct semaphore *sem)
-{
- unsigned long flags;
- int ret = 1;
-
- spin_lock_irqsave(&semaphore_wake_lock, flags);
- if (sem->waking <= 0)
- atomic_inc(&sem->count);
- else {
- sem->waking--;
- ret = 0;
- }
- spin_unlock_irqrestore(&semaphore_wake_lock, flags);
- return ret;
-}
-
-#endif /* _ASM_PARISC_SEMAPHORE_HELPER_H */
diff --git a/include/asm-parisc/semaphore.h b/include/asm-parisc/semaphore.h
index a16271c..d9b2034 100644
--- a/include/asm-parisc/semaphore.h
+++ b/include/asm-parisc/semaphore.h
@@ -1,145 +1 @@
-/* SMP- and interrupt-safe semaphores.
- * PA-RISC version by Matthew Wilcox
- *
- * Linux/PA-RISC Project (http://www.parisc-linux.org/)
- * Copyright (C) 1996 Linus Torvalds
- * Copyright (C) 1999-2001 Matthew Wilcox < willy at debian d0T org >
- * Copyright (C) 2000 Grant Grundler < grundler a debian org >
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-#ifndef _ASM_PARISC_SEMAPHORE_H
-#define _ASM_PARISC_SEMAPHORE_H
-
-#include <linux/spinlock.h>
-#include <linux/wait.h>
-#include <linux/rwsem.h>
-
-#include <asm/system.h>
-
-/*
- * The `count' is initialised to the number of people who are allowed to
- * take the lock. (Normally we want a mutex, so this is `1'). if
- * `count' is positive, the lock can be taken. if it's 0, no-one is
- * waiting on it. if it's -1, at least one task is waiting.
- */
-struct semaphore {
- spinlock_t sentry;
- int count;
- wait_queue_head_t wait;
-};
-
-#define __SEMAPHORE_INITIALIZER(name, n) \
-{ \
- .sentry = SPIN_LOCK_UNLOCKED, \
- .count = n, \
- .wait = __WAIT_QUEUE_HEAD_INITIALIZER((name).wait) \
-}
-
-#define __DECLARE_SEMAPHORE_GENERIC(name,count) \
- struct semaphore name = __SEMAPHORE_INITIALIZER(name,count)
-
-#define DECLARE_MUTEX(name) __DECLARE_SEMAPHORE_GENERIC(name,1)
-
-static inline void sema_init (struct semaphore *sem, int val)
-{
- *sem = (struct semaphore)__SEMAPHORE_INITIALIZER((*sem),val);
-}
-
-static inline void init_MUTEX (struct semaphore *sem)
-{
- sema_init(sem, 1);
-}
-
-static inline void init_MUTEX_LOCKED (struct semaphore *sem)
-{
- sema_init(sem, 0);
-}
-
-static inline int sem_getcount(struct semaphore *sem)
-{
- return sem->count;
-}
-
-asmlinkage void __down(struct semaphore * sem);
-asmlinkage int __down_interruptible(struct semaphore * sem);
-asmlinkage void __up(struct semaphore * sem);
-
-/* Semaphores can be `tried' from irq context. So we have to disable
- * interrupts while we're messing with the semaphore. Sorry.
- */
-
-static inline void down(struct semaphore * sem)
-{
- might_sleep();
- spin_lock_irq(&sem->sentry);
- if (sem->count > 0) {
- sem->count--;
- } else {
- __down(sem);
- }
- spin_unlock_irq(&sem->sentry);
-}
-
-static inline int down_interruptible(struct semaphore * sem)
-{
- int ret = 0;
- might_sleep();
- spin_lock_irq(&sem->sentry);
- if (sem->count > 0) {
- sem->count--;
- } else {
- ret = __down_interruptible(sem);
- }
- spin_unlock_irq(&sem->sentry);
- return ret;
-}
-
-/*
- * down_trylock returns 0 on success, 1 if we failed to get the lock.
- * May not sleep, but must preserve irq state
- */
-static inline int down_trylock(struct semaphore * sem)
-{
- unsigned long flags;
- int count;
-
- spin_lock_irqsave(&sem->sentry, flags);
- count = sem->count - 1;
- if (count >= 0)
- sem->count = count;
- spin_unlock_irqrestore(&sem->sentry, flags);
- return (count < 0);
-}
-
-/*
- * Note! This is subtle. We jump to wake people up only if
- * the semaphore was negative (== somebody was waiting on it).
- */
-static inline void up(struct semaphore * sem)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&sem->sentry, flags);
- if (sem->count < 0) {
- __up(sem);
- } else {
- sem->count++;
- }
- spin_unlock_irqrestore(&sem->sentry, flags);
-}
-
-#endif /* _ASM_PARISC_SEMAPHORE_H */
+#include <linux/semaphore.h>
diff --git a/include/asm-powerpc/semaphore.h b/include/asm-powerpc/semaphore.h
index 48dd32e..d9b2034 100644
--- a/include/asm-powerpc/semaphore.h
+++ b/include/asm-powerpc/semaphore.h
@@ -1,94 +1 @@
-#ifndef _ASM_POWERPC_SEMAPHORE_H
-#define _ASM_POWERPC_SEMAPHORE_H
-
-/*
- * Remove spinlock-based RW semaphores; RW semaphore definitions are
- * now in rwsem.h and we use the generic lib/rwsem.c implementation.
- * Rework semaphores to use atomic_dec_if_positive.
- * -- Paul Mackerras (paulus@samba.org)
- */
-
-#ifdef __KERNEL__
-
-#include <asm/atomic.h>
-#include <asm/system.h>
-#include <linux/wait.h>
-#include <linux/rwsem.h>
-
-struct semaphore {
- /*
- * Note that any negative value of count is equivalent to 0,
- * but additionally indicates that some process(es) might be
- * sleeping on `wait'.
- */
- atomic_t count;
- wait_queue_head_t wait;
-};
-
-#define __SEMAPHORE_INITIALIZER(name, n) \
-{ \
- .count = ATOMIC_INIT(n), \
- .wait = __WAIT_QUEUE_HEAD_INITIALIZER((name).wait) \
-}
-
-#define __DECLARE_SEMAPHORE_GENERIC(name, count) \
- struct semaphore name = __SEMAPHORE_INITIALIZER(name,count)
-
-#define DECLARE_MUTEX(name) __DECLARE_SEMAPHORE_GENERIC(name, 1)
-
-static inline void sema_init (struct semaphore *sem, int val)
-{
- atomic_set(&sem->count, val);
- init_waitqueue_head(&sem->wait);
-}
-
-static inline void init_MUTEX (struct semaphore *sem)
-{
- sema_init(sem, 1);
-}
-
-static inline void init_MUTEX_LOCKED (struct semaphore *sem)
-{
- sema_init(sem, 0);
-}
-
-extern void __down(struct semaphore * sem);
-extern int __down_interruptible(struct semaphore * sem);
-extern void __up(struct semaphore * sem);
-
-static inline void down(struct semaphore * sem)
-{
- might_sleep();
-
- /*
- * Try to get the semaphore, take the slow path if we fail.
- */
- if (unlikely(atomic_dec_return(&sem->count) < 0))
- __down(sem);
-}
-
-static inline int down_interruptible(struct semaphore * sem)
-{
- int ret = 0;
-
- might_sleep();
-
- if (unlikely(atomic_dec_return(&sem->count) < 0))
- ret = __down_interruptible(sem);
- return ret;
-}
-
-static inline int down_trylock(struct semaphore * sem)
-{
- return atomic_dec_if_positive(&sem->count) < 0;
-}
-
-static inline void up(struct semaphore * sem)
-{
- if (unlikely(atomic_inc_return(&sem->count) <= 0))
- __up(sem);
-}
-
-#endif /* __KERNEL__ */
-
-#endif /* _ASM_POWERPC_SEMAPHORE_H */
+#include <linux/semaphore.h>
diff --git a/include/asm-s390/semaphore.h b/include/asm-s390/semaphore.h
index 0e7001a..d9b2034 100644
--- a/include/asm-s390/semaphore.h
+++ b/include/asm-s390/semaphore.h
@@ -1,107 +1 @@
-/*
- * include/asm-s390/semaphore.h
- *
- * S390 version
- * Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
- *
- * Derived from "include/asm-i386/semaphore.h"
- * (C) Copyright 1996 Linus Torvalds
- */
-
-#ifndef _S390_SEMAPHORE_H
-#define _S390_SEMAPHORE_H
-
-#include <asm/system.h>
-#include <asm/atomic.h>
-#include <linux/wait.h>
-#include <linux/rwsem.h>
-
-struct semaphore {
- /*
- * Note that any negative value of count is equivalent to 0,
- * but additionally indicates that some process(es) might be
- * sleeping on `wait'.
- */
- atomic_t count;
- wait_queue_head_t wait;
-};
-
-#define __SEMAPHORE_INITIALIZER(name,count) \
- { ATOMIC_INIT(count), __WAIT_QUEUE_HEAD_INITIALIZER((name).wait) }
-
-#define __DECLARE_SEMAPHORE_GENERIC(name,count) \
- struct semaphore name = __SEMAPHORE_INITIALIZER(name,count)
-
-#define DECLARE_MUTEX(name) __DECLARE_SEMAPHORE_GENERIC(name,1)
-
-static inline void sema_init (struct semaphore *sem, int val)
-{
- atomic_set(&sem->count, val);
- init_waitqueue_head(&sem->wait);
-}
-
-static inline void init_MUTEX (struct semaphore *sem)
-{
- sema_init(sem, 1);
-}
-
-static inline void init_MUTEX_LOCKED (struct semaphore *sem)
-{
- sema_init(sem, 0);
-}
-
-asmlinkage void __down(struct semaphore * sem);
-asmlinkage int __down_interruptible(struct semaphore * sem);
-asmlinkage int __down_trylock(struct semaphore * sem);
-asmlinkage void __up(struct semaphore * sem);
-
-static inline void down(struct semaphore * sem)
-{
- might_sleep();
- if (atomic_dec_return(&sem->count) < 0)
- __down(sem);
-}
-
-static inline int down_interruptible(struct semaphore * sem)
-{
- int ret = 0;
-
- might_sleep();
- if (atomic_dec_return(&sem->count) < 0)
- ret = __down_interruptible(sem);
- return ret;
-}
-
-static inline int down_trylock(struct semaphore * sem)
-{
- int old_val, new_val;
-
- /*
- * This inline assembly atomically implements the equivalent
- * to the following C code:
- * old_val = sem->count.counter;
- * if ((new_val = old_val) > 0)
- * sem->count.counter = --new_val;
- * In the ppc code this is called atomic_dec_if_positive.
- */
- asm volatile(
- " l %0,0(%3)\n"
- "0: ltr %1,%0\n"
- " jle 1f\n"
- " ahi %1,-1\n"
- " cs %0,%1,0(%3)\n"
- " jl 0b\n"
- "1:"
- : "=&d" (old_val), "=&d" (new_val), "=m" (sem->count.counter)
- : "a" (&sem->count.counter), "m" (sem->count.counter)
- : "cc", "memory");
- return old_val <= 0;
-}
-
-static inline void up(struct semaphore * sem)
-{
- if (atomic_inc_return(&sem->count) <= 0)
- __up(sem);
-}
-
-#endif
+#include <linux/semaphore.h>
diff --git a/include/asm-sh/semaphore-helper.h b/include/asm-sh/semaphore-helper.h
deleted file mode 100644
index bd8230c..0000000
--- a/include/asm-sh/semaphore-helper.h
+++ /dev/null
@@ -1,89 +0,0 @@
-#ifndef __ASM_SH_SEMAPHORE_HELPER_H
-#define __ASM_SH_SEMAPHORE_HELPER_H
-
-/*
- * SMP- and interrupt-safe semaphores helper functions.
- *
- * (C) Copyright 1996 Linus Torvalds
- * (C) Copyright 1999 Andrea Arcangeli
- */
-
-/*
- * These two _must_ execute atomically wrt each other.
- *
- * This is trivially done with load_locked/store_cond,
- * which we have. Let the rest of the losers suck eggs.
- */
-static __inline__ void wake_one_more(struct semaphore * sem)
-{
- atomic_inc((atomic_t *)&sem->sleepers);
-}
-
-static __inline__ int waking_non_zero(struct semaphore *sem)
-{
- unsigned long flags;
- int ret = 0;
-
- spin_lock_irqsave(&semaphore_wake_lock, flags);
- if (sem->sleepers > 0) {
- sem->sleepers--;
- ret = 1;
- }
- spin_unlock_irqrestore(&semaphore_wake_lock, flags);
- return ret;
-}
-
-/*
- * waking_non_zero_interruptible:
- * 1 got the lock
- * 0 go to sleep
- * -EINTR interrupted
- *
- * We must undo the sem->count down_interruptible() increment while we are
- * protected by the spinlock in order to make atomic this atomic_inc() with the
- * atomic_read() in wake_one_more(), otherwise we can race. -arca
- */
-static __inline__ int waking_non_zero_interruptible(struct semaphore *sem,
- struct task_struct *tsk)
-{
- unsigned long flags;
- int ret = 0;
-
- spin_lock_irqsave(&semaphore_wake_lock, flags);
- if (sem->sleepers > 0) {
- sem->sleepers--;
- ret = 1;
- } else if (signal_pending(tsk)) {
- atomic_inc(&sem->count);
- ret = -EINTR;
- }
- spin_unlock_irqrestore(&semaphore_wake_lock, flags);
- return ret;
-}
-
-/*
- * waking_non_zero_trylock:
- * 1 failed to lock
- * 0 got the lock
- *
- * We must undo the sem->count down_trylock() increment while we are
- * protected by the spinlock in order to make atomic this atomic_inc() with the
- * atomic_read() in wake_one_more(), otherwise we can race. -arca
- */
-static __inline__ int waking_non_zero_trylock(struct semaphore *sem)
-{
- unsigned long flags;
- int ret = 1;
-
- spin_lock_irqsave(&semaphore_wake_lock, flags);
- if (sem->sleepers <= 0)
- atomic_inc(&sem->count);
- else {
- sem->sleepers--;
- ret = 0;
- }
- spin_unlock_irqrestore(&semaphore_wake_lock, flags);
- return ret;
-}
-
-#endif /* __ASM_SH_SEMAPHORE_HELPER_H */
diff --git a/include/asm-sh/semaphore.h b/include/asm-sh/semaphore.h
index 9e5a37c..d9b2034 100644
--- a/include/asm-sh/semaphore.h
+++ b/include/asm-sh/semaphore.h
@@ -1,115 +1 @@
-#ifndef __ASM_SH_SEMAPHORE_H
-#define __ASM_SH_SEMAPHORE_H
-
-#include <linux/linkage.h>
-
-#ifdef __KERNEL__
-/*
- * SMP- and interrupt-safe semaphores.
- *
- * (C) Copyright 1996 Linus Torvalds
- *
- * SuperH verison by Niibe Yutaka
- * (Currently no asm implementation but generic C code...)
- */
-
-#include <linux/spinlock.h>
-#include <linux/rwsem.h>
-#include <linux/wait.h>
-
-#include <asm/system.h>
-#include <asm/atomic.h>
-
-struct semaphore {
- atomic_t count;
- int sleepers;
- wait_queue_head_t wait;
-};
-
-#define __SEMAPHORE_INITIALIZER(name, n) \
-{ \
- .count = ATOMIC_INIT(n), \
- .sleepers = 0, \
- .wait = __WAIT_QUEUE_HEAD_INITIALIZER((name).wait) \
-}
-
-#define __DECLARE_SEMAPHORE_GENERIC(name,count) \
- struct semaphore name = __SEMAPHORE_INITIALIZER(name,count)
-
-#define DECLARE_MUTEX(name) __DECLARE_SEMAPHORE_GENERIC(name,1)
-
-static inline void sema_init (struct semaphore *sem, int val)
-{
-/*
- * *sem = (struct semaphore)__SEMAPHORE_INITIALIZER((*sem),val);
- *
- * i'd rather use the more flexible initialization above, but sadly
- * GCC 2.7.2.3 emits a bogus warning. EGCS doesn't. Oh well.
- */
- atomic_set(&sem->count, val);
- sem->sleepers = 0;
- init_waitqueue_head(&sem->wait);
-}
-
-static inline void init_MUTEX (struct semaphore *sem)
-{
- sema_init(sem, 1);
-}
-
-static inline void init_MUTEX_LOCKED (struct semaphore *sem)
-{
- sema_init(sem, 0);
-}
-
-#if 0
-asmlinkage void __down_failed(void /* special register calling convention */);
-asmlinkage int __down_failed_interruptible(void /* params in registers */);
-asmlinkage int __down_failed_trylock(void /* params in registers */);
-asmlinkage void __up_wakeup(void /* special register calling convention */);
-#endif
-
-asmlinkage void __down(struct semaphore * sem);
-asmlinkage int __down_interruptible(struct semaphore * sem);
-asmlinkage int __down_trylock(struct semaphore * sem);
-asmlinkage void __up(struct semaphore * sem);
-
-extern spinlock_t semaphore_wake_lock;
-
-static inline void down(struct semaphore * sem)
-{
- might_sleep();
- if (atomic_dec_return(&sem->count) < 0)
- __down(sem);
-}
-
-static inline int down_interruptible(struct semaphore * sem)
-{
- int ret = 0;
-
- might_sleep();
- if (atomic_dec_return(&sem->count) < 0)
- ret = __down_interruptible(sem);
- return ret;
-}
-
-static inline int down_trylock(struct semaphore * sem)
-{
- int ret = 0;
-
- if (atomic_dec_return(&sem->count) < 0)
- ret = __down_trylock(sem);
- return ret;
-}
-
-/*
- * Note! This is subtle. We jump to wake people up only if
- * the semaphore was negative (== somebody was waiting on it).
- */
-static inline void up(struct semaphore * sem)
-{
- if (atomic_inc_return(&sem->count) <= 0)
- __up(sem);
-}
-
-#endif
-#endif /* __ASM_SH_SEMAPHORE_H */
+#include <linux/semaphore.h>
diff --git a/include/asm-sparc/semaphore.h b/include/asm-sparc/semaphore.h
index 8018f9f..d9b2034 100644
--- a/include/asm-sparc/semaphore.h
+++ b/include/asm-sparc/semaphore.h
@@ -1,192 +1 @@
-#ifndef _SPARC_SEMAPHORE_H
-#define _SPARC_SEMAPHORE_H
-
-/* Dinky, good for nothing, just barely irq safe, Sparc semaphores. */
-
-#ifdef __KERNEL__
-
-#include <asm/atomic.h>
-#include <linux/wait.h>
-#include <linux/rwsem.h>
-
-struct semaphore {
- atomic24_t count;
- int sleepers;
- wait_queue_head_t wait;
-};
-
-#define __SEMAPHORE_INITIALIZER(name, n) \
-{ \
- .count = ATOMIC24_INIT(n), \
- .sleepers = 0, \
- .wait = __WAIT_QUEUE_HEAD_INITIALIZER((name).wait) \
-}
-
-#define __DECLARE_SEMAPHORE_GENERIC(name,count) \
- struct semaphore name = __SEMAPHORE_INITIALIZER(name,count)
-
-#define DECLARE_MUTEX(name) __DECLARE_SEMAPHORE_GENERIC(name,1)
-
-static inline void sema_init (struct semaphore *sem, int val)
-{
- atomic24_set(&sem->count, val);
- sem->sleepers = 0;
- init_waitqueue_head(&sem->wait);
-}
-
-static inline void init_MUTEX (struct semaphore *sem)
-{
- sema_init(sem, 1);
-}
-
-static inline void init_MUTEX_LOCKED (struct semaphore *sem)
-{
- sema_init(sem, 0);
-}
-
-extern void __down(struct semaphore * sem);
-extern int __down_interruptible(struct semaphore * sem);
-extern int __down_trylock(struct semaphore * sem);
-extern void __up(struct semaphore * sem);
-
-static inline void down(struct semaphore * sem)
-{
- register volatile int *ptr asm("g1");
- register int increment asm("g2");
-
- might_sleep();
-
- ptr = &(sem->count.counter);
- increment = 1;
-
- __asm__ __volatile__(
- "mov %%o7, %%g4\n\t"
- "call ___atomic24_sub\n\t"
- " add %%o7, 8, %%o7\n\t"
- "tst %%g2\n\t"
- "bl 2f\n\t"
- " nop\n"
- "1:\n\t"
- ".subsection 2\n"
- "2:\n\t"
- "save %%sp, -64, %%sp\n\t"
- "mov %%g1, %%l1\n\t"
- "mov %%g5, %%l5\n\t"
- "call %3\n\t"
- " mov %%g1, %%o0\n\t"
- "mov %%l1, %%g1\n\t"
- "ba 1b\n\t"
- " restore %%l5, %%g0, %%g5\n\t"
- ".previous\n"
- : "=&r" (increment)
- : "0" (increment), "r" (ptr), "i" (__down)
- : "g3", "g4", "g7", "memory", "cc");
-}
-
-static inline int down_interruptible(struct semaphore * sem)
-{
- register volatile int *ptr asm("g1");
- register int increment asm("g2");
-
- might_sleep();
-
- ptr = &(sem->count.counter);
- increment = 1;
-
- __asm__ __volatile__(
- "mov %%o7, %%g4\n\t"
- "call ___atomic24_sub\n\t"
- " add %%o7, 8, %%o7\n\t"
- "tst %%g2\n\t"
- "bl 2f\n\t"
- " clr %%g2\n"
- "1:\n\t"
- ".subsection 2\n"
- "2:\n\t"
- "save %%sp, -64, %%sp\n\t"
- "mov %%g1, %%l1\n\t"
- "mov %%g5, %%l5\n\t"
- "call %3\n\t"
- " mov %%g1, %%o0\n\t"
- "mov %%l1, %%g1\n\t"
- "mov %%l5, %%g5\n\t"
- "ba 1b\n\t"
- " restore %%o0, %%g0, %%g2\n\t"
- ".previous\n"
- : "=&r" (increment)
- : "0" (increment), "r" (ptr), "i" (__down_interruptible)
- : "g3", "g4", "g7", "memory", "cc");
-
- return increment;
-}
-
-static inline int down_trylock(struct semaphore * sem)
-{
- register volatile int *ptr asm("g1");
- register int increment asm("g2");
-
- ptr = &(sem->count.counter);
- increment = 1;
-
- __asm__ __volatile__(
- "mov %%o7, %%g4\n\t"
- "call ___atomic24_sub\n\t"
- " add %%o7, 8, %%o7\n\t"
- "tst %%g2\n\t"
- "bl 2f\n\t"
- " clr %%g2\n"
- "1:\n\t"
- ".subsection 2\n"
- "2:\n\t"
- "save %%sp, -64, %%sp\n\t"
- "mov %%g1, %%l1\n\t"
- "mov %%g5, %%l5\n\t"
- "call %3\n\t"
- " mov %%g1, %%o0\n\t"
- "mov %%l1, %%g1\n\t"
- "mov %%l5, %%g5\n\t"
- "ba 1b\n\t"
- " restore %%o0, %%g0, %%g2\n\t"
- ".previous\n"
- : "=&r" (increment)
- : "0" (increment), "r" (ptr), "i" (__down_trylock)
- : "g3", "g4", "g7", "memory", "cc");
-
- return increment;
-}
-
-static inline void up(struct semaphore * sem)
-{
- register volatile int *ptr asm("g1");
- register int increment asm("g2");
-
- ptr = &(sem->count.counter);
- increment = 1;
-
- __asm__ __volatile__(
- "mov %%o7, %%g4\n\t"
- "call ___atomic24_add\n\t"
- " add %%o7, 8, %%o7\n\t"
- "tst %%g2\n\t"
- "ble 2f\n\t"
- " nop\n"
- "1:\n\t"
- ".subsection 2\n"
- "2:\n\t"
- "save %%sp, -64, %%sp\n\t"
- "mov %%g1, %%l1\n\t"
- "mov %%g5, %%l5\n\t"
- "call %3\n\t"
- " mov %%g1, %%o0\n\t"
- "mov %%l1, %%g1\n\t"
- "ba 1b\n\t"
- " restore %%l5, %%g0, %%g5\n\t"
- ".previous\n"
- : "=&r" (increment)
- : "0" (increment), "r" (ptr), "i" (__up)
- : "g3", "g4", "g7", "memory", "cc");
-}
-
-#endif /* __KERNEL__ */
-
-#endif /* !(_SPARC_SEMAPHORE_H) */
+#include <linux/semaphore.h>
diff --git a/include/asm-sparc64/semaphore.h b/include/asm-sparc64/semaphore.h
index 7f7c0c4..d9b2034 100644
--- a/include/asm-sparc64/semaphore.h
+++ b/include/asm-sparc64/semaphore.h
@@ -1,53 +1 @@
-#ifndef _SPARC64_SEMAPHORE_H
-#define _SPARC64_SEMAPHORE_H
-
-/* These are actually reasonable on the V9.
- *
- * See asm-ppc/semaphore.h for implementation commentary,
- * only sparc64 specific issues are commented here.
- */
-#ifdef __KERNEL__
-
-#include <asm/atomic.h>
-#include <asm/system.h>
-#include <linux/wait.h>
-#include <linux/rwsem.h>
-
-struct semaphore {
- atomic_t count;
- wait_queue_head_t wait;
-};
-
-#define __SEMAPHORE_INITIALIZER(name, count) \
- { ATOMIC_INIT(count), \
- __WAIT_QUEUE_HEAD_INITIALIZER((name).wait) }
-
-#define __DECLARE_SEMAPHORE_GENERIC(name, count) \
- struct semaphore name = __SEMAPHORE_INITIALIZER(name,count)
-
-#define DECLARE_MUTEX(name) __DECLARE_SEMAPHORE_GENERIC(name, 1)
-
-static inline void sema_init (struct semaphore *sem, int val)
-{
- atomic_set(&sem->count, val);
- init_waitqueue_head(&sem->wait);
-}
-
-static inline void init_MUTEX (struct semaphore *sem)
-{
- sema_init(sem, 1);
-}
-
-static inline void init_MUTEX_LOCKED (struct semaphore *sem)
-{
- sema_init(sem, 0);
-}
-
-extern void up(struct semaphore *sem);
-extern void down(struct semaphore *sem);
-extern int down_trylock(struct semaphore *sem);
-extern int down_interruptible(struct semaphore *sem);
-
-#endif /* __KERNEL__ */
-
-#endif /* !(_SPARC64_SEMAPHORE_H) */
+#include <linux/semaphore.h>
diff --git a/include/asm-um/semaphore.h b/include/asm-um/semaphore.h
index ff13c34..d9b2034 100644
--- a/include/asm-um/semaphore.h
+++ b/include/asm-um/semaphore.h
@@ -1,6 +1 @@
-#ifndef __UM_SEMAPHORE_H
-#define __UM_SEMAPHORE_H
-
-#include "asm/arch/semaphore.h"
-
-#endif
+#include <linux/semaphore.h>
diff --git a/include/asm-v850/semaphore.h b/include/asm-v850/semaphore.h
index 10ed0cc..d9b2034 100644
--- a/include/asm-v850/semaphore.h
+++ b/include/asm-v850/semaphore.h
@@ -1,84 +1 @@
-#ifndef __V850_SEMAPHORE_H__
-#define __V850_SEMAPHORE_H__
-
-#include <linux/linkage.h>
-#include <linux/spinlock.h>
-#include <linux/wait.h>
-#include <linux/rwsem.h>
-
-#include <asm/atomic.h>
-
-struct semaphore {
- atomic_t count;
- int sleepers;
- wait_queue_head_t wait;
-};
-
-#define __SEMAPHORE_INITIALIZER(name,count) \
- { ATOMIC_INIT (count), 0, \
- __WAIT_QUEUE_HEAD_INITIALIZER ((name).wait) }
-
-#define __DECLARE_SEMAPHORE_GENERIC(name,count) \
- struct semaphore name = __SEMAPHORE_INITIALIZER (name,count)
-
-#define DECLARE_MUTEX(name) __DECLARE_SEMAPHORE_GENERIC (name,1)
-
-static inline void sema_init (struct semaphore *sem, int val)
-{
- *sem = (struct semaphore)__SEMAPHORE_INITIALIZER((*sem),val);
-}
-
-static inline void init_MUTEX (struct semaphore *sem)
-{
- sema_init (sem, 1);
-}
-
-static inline void init_MUTEX_LOCKED (struct semaphore *sem)
-{
- sema_init (sem, 0);
-}
-
-/*
- * special register calling convention
- */
-asmlinkage void __down_failed (void);
-asmlinkage int __down_interruptible_failed (void);
-asmlinkage int __down_trylock_failed (void);
-asmlinkage void __up_wakeup (void);
-
-extern void __down (struct semaphore * sem);
-extern int __down_interruptible (struct semaphore * sem);
-extern int __down_trylock (struct semaphore * sem);
-extern void __up (struct semaphore * sem);
-
-static inline void down (struct semaphore * sem)
-{
- might_sleep();
- if (atomic_dec_return (&sem->count) < 0)
- __down (sem);
-}
-
-static inline int down_interruptible (struct semaphore * sem)
-{
- int ret = 0;
- might_sleep();
- if (atomic_dec_return (&sem->count) < 0)
- ret = __down_interruptible (sem);
- return ret;
-}
-
-static inline int down_trylock (struct semaphore *sem)
-{
- int ret = 0;
- if (atomic_dec_return (&sem->count) < 0)
- ret = __down_trylock (sem);
- return ret;
-}
-
-static inline void up (struct semaphore * sem)
-{
- if (atomic_inc_return (&sem->count) <= 0)
- __up (sem);
-}
-
-#endif /* __V850_SEMAPHORE_H__ */
+#include <linux/semaphore.h>
diff --git a/include/asm-x86/semaphore.h b/include/asm-x86/semaphore.h
index 572c0b6..d9b2034 100644
--- a/include/asm-x86/semaphore.h
+++ b/include/asm-x86/semaphore.h
@@ -1,5 +1 @@
-#ifdef CONFIG_X86_32
-# include "semaphore_32.h"
-#else
-# include "semaphore_64.h"
-#endif
+#include <linux/semaphore.h>
diff --git a/include/asm-x86/semaphore_32.h b/include/asm-x86/semaphore_32.h
deleted file mode 100644
index ac96d38..0000000
--- a/include/asm-x86/semaphore_32.h
+++ /dev/null
@@ -1,175 +0,0 @@
-#ifndef _I386_SEMAPHORE_H
-#define _I386_SEMAPHORE_H
-
-#include <linux/linkage.h>
-
-#ifdef __KERNEL__
-
-/*
- * SMP- and interrupt-safe semaphores..
- *
- * (C) Copyright 1996 Linus Torvalds
- *
- * Modified 1996-12-23 by Dave Grothe <dave@gcom.com> to fix bugs in
- * the original code and to make semaphore waits
- * interruptible so that processes waiting on
- * semaphores can be killed.
- * Modified 1999-02-14 by Andrea Arcangeli, split the sched.c helper
- * functions in asm/sempahore-helper.h while fixing a
- * potential and subtle race discovered by Ulrich Schmid
- * in down_interruptible(). Since I started to play here I
- * also implemented the `trylock' semaphore operation.
- * 1999-07-02 Artur Skawina <skawina@geocities.com>
- * Optimized "0(ecx)" -> "(ecx)" (the assembler does not
- * do this). Changed calling sequences from push/jmp to
- * traditional call/ret.
- * Modified 2001-01-01 Andreas Franck <afranck@gmx.de>
- * Some hacks to ensure compatibility with recent
- * GCC snapshots, to avoid stack corruption when compiling
- * with -fomit-frame-pointer. It's not sure if this will
- * be fixed in GCC, as our previous implementation was a
- * bit dubious.
- *
- * If you would like to see an analysis of this implementation, please
- * ftp to gcom.com and download the file
- * /pub/linux/src/semaphore/semaphore-2.0.24.tar.gz.
- *
- */
-
-#include <asm/system.h>
-#include <asm/atomic.h>
-#include <linux/wait.h>
-#include <linux/rwsem.h>
-
-struct semaphore {
- atomic_t count;
- int sleepers;
- wait_queue_head_t wait;
-};
-
-
-#define __SEMAPHORE_INITIALIZER(name, n) \
-{ \
- .count = ATOMIC_INIT(n), \
- .sleepers = 0, \
- .wait = __WAIT_QUEUE_HEAD_INITIALIZER((name).wait) \
-}
-
-#define __DECLARE_SEMAPHORE_GENERIC(name,count) \
- struct semaphore name = __SEMAPHORE_INITIALIZER(name,count)
-
-#define DECLARE_MUTEX(name) __DECLARE_SEMAPHORE_GENERIC(name,1)
-
-static inline void sema_init (struct semaphore *sem, int val)
-{
-/*
- * *sem = (struct semaphore)__SEMAPHORE_INITIALIZER((*sem),val);
- *
- * i'd rather use the more flexible initialization above, but sadly
- * GCC 2.7.2.3 emits a bogus warning. EGCS doesn't. Oh well.
- */
- atomic_set(&sem->count, val);
- sem->sleepers = 0;
- init_waitqueue_head(&sem->wait);
-}
-
-static inline void init_MUTEX (struct semaphore *sem)
-{
- sema_init(sem, 1);
-}
-
-static inline void init_MUTEX_LOCKED (struct semaphore *sem)
-{
- sema_init(sem, 0);
-}
-
-extern asmregparm void __down_failed(atomic_t *count_ptr);
-extern asmregparm int __down_failed_interruptible(atomic_t *count_ptr);
-extern asmregparm int __down_failed_trylock(atomic_t *count_ptr);
-extern asmregparm void __up_wakeup(atomic_t *count_ptr);
-
-/*
- * This is ugly, but we want the default case to fall through.
- * "__down_failed" is a special asm handler that calls the C
- * routine that actually waits. See arch/i386/kernel/semaphore.c
- */
-static inline void down(struct semaphore * sem)
-{
- might_sleep();
- __asm__ __volatile__(
- "# atomic down operation\n\t"
- LOCK_PREFIX "decl %0\n\t" /* --sem->count */
- "jns 2f\n"
- "\tlea %0,%%eax\n\t"
- "call __down_failed\n"
- "2:"
- :"+m" (sem->count)
- :
- :"memory","ax");
-}
-
-/*
- * Interruptible try to acquire a semaphore. If we obtained
- * it, return zero. If we were interrupted, returns -EINTR
- */
-static inline int down_interruptible(struct semaphore * sem)
-{
- int result;
-
- might_sleep();
- __asm__ __volatile__(
- "# atomic interruptible down operation\n\t"
- "xorl %0,%0\n\t"
- LOCK_PREFIX "decl %1\n\t" /* --sem->count */
- "jns 2f\n\t"
- "lea %1,%%eax\n\t"
- "call __down_failed_interruptible\n"
- "2:"
- :"=&a" (result), "+m" (sem->count)
- :
- :"memory");
- return result;
-}
-
-/*
- * Non-blockingly attempt to down() a semaphore.
- * Returns zero if we acquired it
- */
-static inline int down_trylock(struct semaphore * sem)
-{
- int result;
-
- __asm__ __volatile__(
- "# atomic interruptible down operation\n\t"
- "xorl %0,%0\n\t"
- LOCK_PREFIX "decl %1\n\t" /* --sem->count */
- "jns 2f\n\t"
- "lea %1,%%eax\n\t"
- "call __down_failed_trylock\n\t"
- "2:\n"
- :"=&a" (result), "+m" (sem->count)
- :
- :"memory");
- return result;
-}
-
-/*
- * Note! This is subtle. We jump to wake people up only if
- * the semaphore was negative (== somebody was waiting on it).
- */
-static inline void up(struct semaphore * sem)
-{
- __asm__ __volatile__(
- "# atomic up operation\n\t"
- LOCK_PREFIX "incl %0\n\t" /* ++sem->count */
- "jg 1f\n\t"
- "lea %0,%%eax\n\t"
- "call __up_wakeup\n"
- "1:"
- :"+m" (sem->count)
- :
- :"memory","ax");
-}
-
-#endif
-#endif
diff --git a/include/asm-x86/semaphore_64.h b/include/asm-x86/semaphore_64.h
deleted file mode 100644
index 7969430..0000000
--- a/include/asm-x86/semaphore_64.h
+++ /dev/null
@@ -1,180 +0,0 @@
-#ifndef _X86_64_SEMAPHORE_H
-#define _X86_64_SEMAPHORE_H
-
-#include <linux/linkage.h>
-
-#ifdef __KERNEL__
-
-/*
- * SMP- and interrupt-safe semaphores..
- *
- * (C) Copyright 1996 Linus Torvalds
- *
- * Modified 1996-12-23 by Dave Grothe <dave@gcom.com> to fix bugs in
- * the original code and to make semaphore waits
- * interruptible so that processes waiting on
- * semaphores can be killed.
- * Modified 1999-02-14 by Andrea Arcangeli, split the sched.c helper
- * functions in asm/sempahore-helper.h while fixing a
- * potential and subtle race discovered by Ulrich Schmid
- * in down_interruptible(). Since I started to play here I
- * also implemented the `trylock' semaphore operation.
- * 1999-07-02 Artur Skawina <skawina@geocities.com>
- * Optimized "0(ecx)" -> "(ecx)" (the assembler does not
- * do this). Changed calling sequences from push/jmp to
- * traditional call/ret.
- * Modified 2001-01-01 Andreas Franck <afranck@gmx.de>
- * Some hacks to ensure compatibility with recent
- * GCC snapshots, to avoid stack corruption when compiling
- * with -fomit-frame-pointer. It's not sure if this will
- * be fixed in GCC, as our previous implementation was a
- * bit dubious.
- *
- * If you would like to see an analysis of this implementation, please
- * ftp to gcom.com and download the file
- * /pub/linux/src/semaphore/semaphore-2.0.24.tar.gz.
- *
- */
-
-#include <asm/system.h>
-#include <asm/atomic.h>
-#include <asm/rwlock.h>
-#include <linux/wait.h>
-#include <linux/rwsem.h>
-#include <linux/stringify.h>
-
-struct semaphore {
- atomic_t count;
- int sleepers;
- wait_queue_head_t wait;
-};
-
-#define __SEMAPHORE_INITIALIZER(name, n) \
-{ \
- .count = ATOMIC_INIT(n), \
- .sleepers = 0, \
- .wait = __WAIT_QUEUE_HEAD_INITIALIZER((name).wait) \
-}
-
-#define __DECLARE_SEMAPHORE_GENERIC(name,count) \
- struct semaphore name = __SEMAPHORE_INITIALIZER(name,count)
-
-#define DECLARE_MUTEX(name) __DECLARE_SEMAPHORE_GENERIC(name,1)
-
-static inline void sema_init (struct semaphore *sem, int val)
-{
-/*
- * *sem = (struct semaphore)__SEMAPHORE_INITIALIZER((*sem),val);
- *
- * i'd rather use the more flexible initialization above, but sadly
- * GCC 2.7.2.3 emits a bogus warning. EGCS doesn't. Oh well.
- */
- atomic_set(&sem->count, val);
- sem->sleepers = 0;
- init_waitqueue_head(&sem->wait);
-}
-
-static inline void init_MUTEX (struct semaphore *sem)
-{
- sema_init(sem, 1);
-}
-
-static inline void init_MUTEX_LOCKED (struct semaphore *sem)
-{
- sema_init(sem, 0);
-}
-
-asmlinkage void __down_failed(void /* special register calling convention */);
-asmlinkage int __down_failed_interruptible(void /* params in registers */);
-asmlinkage int __down_failed_trylock(void /* params in registers */);
-asmlinkage void __up_wakeup(void /* special register calling convention */);
-
-asmlinkage void __down(struct semaphore * sem);
-asmlinkage int __down_interruptible(struct semaphore * sem);
-asmlinkage int __down_trylock(struct semaphore * sem);
-asmlinkage void __up(struct semaphore * sem);
-
-/*
- * This is ugly, but we want the default case to fall through.
- * "__down_failed" is a special asm handler that calls the C
- * routine that actually waits. See arch/x86_64/kernel/semaphore.c
- */
-static inline void down(struct semaphore * sem)
-{
- might_sleep();
-
- __asm__ __volatile__(
- "# atomic down operation\n\t"
- LOCK_PREFIX "decl %0\n\t" /* --sem->count */
- "jns 1f\n\t"
- "call __down_failed\n"
- "1:"
- :"=m" (sem->count)
- :"D" (sem)
- :"memory");
-}
-
-/*
- * Interruptible try to acquire a semaphore. If we obtained
- * it, return zero. If we were interrupted, returns -EINTR
- */
-static inline int down_interruptible(struct semaphore * sem)
-{
- int result;
-
- might_sleep();
-
- __asm__ __volatile__(
- "# atomic interruptible down operation\n\t"
- "xorl %0,%0\n\t"
- LOCK_PREFIX "decl %1\n\t" /* --sem->count */
- "jns 2f\n\t"
- "call __down_failed_interruptible\n"
- "2:\n"
- :"=&a" (result), "=m" (sem->count)
- :"D" (sem)
- :"memory");
- return result;
-}
-
-/*
- * Non-blockingly attempt to down() a semaphore.
- * Returns zero if we acquired it
- */
-static inline int down_trylock(struct semaphore * sem)
-{
- int result;
-
- __asm__ __volatile__(
- "# atomic interruptible down operation\n\t"
- "xorl %0,%0\n\t"
- LOCK_PREFIX "decl %1\n\t" /* --sem->count */
- "jns 2f\n\t"
- "call __down_failed_trylock\n\t"
- "2:\n"
- :"=&a" (result), "=m" (sem->count)
- :"D" (sem)
- :"memory","cc");
- return result;
-}
-
-/*
- * Note! This is subtle. We jump to wake people up only if
- * the semaphore was negative (== somebody was waiting on it).
- * The default case (no contention) will result in NO
- * jumps for both down() and up().
- */
-static inline void up(struct semaphore * sem)
-{
- __asm__ __volatile__(
- "# atomic up operation\n\t"
- LOCK_PREFIX "incl %0\n\t" /* ++sem->count */
- "jg 1f\n\t"
- "call __up_wakeup\n"
- "1:"
- :"=m" (sem->count)
- :"D" (sem)
- :"memory");
-}
-#endif /* __KERNEL__ */
-#endif
diff --git a/include/asm-xtensa/semaphore.h b/include/asm-xtensa/semaphore.h
index 3e04167..d9b2034 100644
--- a/include/asm-xtensa/semaphore.h
+++ b/include/asm-xtensa/semaphore.h
@@ -1,99 +1 @@
-/*
- * linux/include/asm-xtensa/semaphore.h
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2001 - 2005 Tensilica Inc.
- */
-
-#ifndef _XTENSA_SEMAPHORE_H
-#define _XTENSA_SEMAPHORE_H
-
-#include <asm/atomic.h>
-#include <asm/system.h>
-#include <linux/wait.h>
-#include <linux/rwsem.h>
-
-struct semaphore {
- atomic_t count;
- int sleepers;
- wait_queue_head_t wait;
-};
-
-#define __SEMAPHORE_INITIALIZER(name,n) \
-{ \
- .count = ATOMIC_INIT(n), \
- .sleepers = 0, \
- .wait = __WAIT_QUEUE_HEAD_INITIALIZER((name).wait) \
-}
-
-#define __DECLARE_SEMAPHORE_GENERIC(name,count) \
- struct semaphore name = __SEMAPHORE_INITIALIZER(name,count)
-
-#define DECLARE_MUTEX(name) __DECLARE_SEMAPHORE_GENERIC(name,1)
-
-static inline void sema_init (struct semaphore *sem, int val)
-{
- atomic_set(&sem->count, val);
- sem->sleepers = 0;
- init_waitqueue_head(&sem->wait);
-}
-
-static inline void init_MUTEX (struct semaphore *sem)
-{
- sema_init(sem, 1);
-}
-
-static inline void init_MUTEX_LOCKED (struct semaphore *sem)
-{
- sema_init(sem, 0);
-}
-
-asmlinkage void __down(struct semaphore * sem);
-asmlinkage int __down_interruptible(struct semaphore * sem);
-asmlinkage int __down_trylock(struct semaphore * sem);
-asmlinkage void __up(struct semaphore * sem);
-
-extern spinlock_t semaphore_wake_lock;
-
-static inline void down(struct semaphore * sem)
-{
- might_sleep();
-
- if (atomic_sub_return(1, &sem->count) < 0)
- __down(sem);
-}
-
-static inline int down_interruptible(struct semaphore * sem)
-{
- int ret = 0;
-
- might_sleep();
-
- if (atomic_sub_return(1, &sem->count) < 0)
- ret = __down_interruptible(sem);
- return ret;
-}
-
-static inline int down_trylock(struct semaphore * sem)
-{
- int ret = 0;
-
- if (atomic_sub_return(1, &sem->count) < 0)
- ret = __down_trylock(sem);
- return ret;
-}
-
-/*
- * Note! This is subtle. We jump to wake people up only if
- * the semaphore was negative (== somebody was waiting on it).
- */
-static inline void up(struct semaphore * sem)
-{
- if (atomic_add_return(1, &sem->count) <= 0)
- __up(sem);
-}
-
-#endif /* _XTENSA_SEMAPHORE_H */
+#include <linux/semaphore.h>
diff --git a/include/linux/semaphore.h b/include/linux/semaphore.h
new file mode 100644
index 0000000..af3b1cf
--- /dev/null
+++ b/include/linux/semaphore.h
@@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 2008 Intel Corporation
+ * Author: Matthew Wilcox <willy@linux.intel.com>
+ *
+ * Distributed under the terms of the GNU GPL, version 2
+ *
+ * Counting semaphores allow up to <n> tasks to acquire the semaphore
+ * simultaneously.
+ */
+#ifndef __LINUX_SEMAPHORE_H
+#define __LINUX_SEMAPHORE_H
+
+#include <linux/list.h>
+#include <linux/spinlock.h>
+
+/*
+ * The spinlock controls access to the other members of the semaphore.
+ * 'count' is decremented by every task which calls down*() and incremented
+ * by every call to up(). Thus, if it is positive, it indicates how many
+ * more tasks may acquire the lock. If it is negative, it indicates how
+ * many tasks are waiting for the lock. Tasks waiting for the lock are
+ * kept on the wait_list.
+ */
+struct semaphore {
+ spinlock_t lock;
+ int count;
+ struct list_head wait_list;
+};
+
+#define __SEMAPHORE_INITIALIZER(name, n) \
+{ \
+ .lock = __SPIN_LOCK_UNLOCKED((name).lock), \
+ .count = n, \
+ .wait_list = LIST_HEAD_INIT((name).wait_list), \
+}
+
+#define __DECLARE_SEMAPHORE_GENERIC(name, count) \
+ struct semaphore name = __SEMAPHORE_INITIALIZER(name, count)
+
+#define DECLARE_MUTEX(name) __DECLARE_SEMAPHORE_GENERIC(name, 1)
+
+static inline void sema_init(struct semaphore *sem, int val)
+{
+ *sem = (struct semaphore) __SEMAPHORE_INITIALIZER(*sem, val);
+}
+
+#define init_MUTEX(sem) sema_init(sem, 1)
+#define init_MUTEX_LOCKED(sem) sema_init(sem, 0)
+
+/*
+ * Attempt to acquire the semaphore. If another task is already holding the
+ * semaphore, sleep until the semaphore is released.
+ */
+extern void down(struct semaphore *sem);
+
+/*
+ * As down(), except the sleep may be interrupted by a signal. If it is,
+ * this function will return -EINTR.
+ */
+extern int __must_check down_interruptible(struct semaphore *sem);
+
+/*
+ * As down_interruptible(), except the sleep may only be interrupted by
+ * signals which are fatal to this process.
+ */
+extern int __must_check down_killable(struct semaphore *sem);
+
+/*
+ * As down, except this function will not sleep. It will return 0 if it
+ * acquired the semaphore and 1 if the semaphore was contended. This
+ * function may be called from any context, including interrupt and softirq.
+ */
+extern int __must_check down_trylock(struct semaphore *sem);
+
+/*
+ * Release the semaphore. Unlike mutexes, up() may be called from any
+ * context and even by tasks which have never called down().
+ */
+extern void up(struct semaphore *sem);
+
+#endif /* __LINUX_SEMAPHORE_H */
diff --git a/kernel/Makefile b/kernel/Makefile
index 6c584c5..f45c69e 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -8,7 +8,7 @@ obj-y = sched.o fork.o exec_domain.o panic.o printk.o profile.o \
signal.o sys.o kmod.o workqueue.o pid.o \
rcupdate.o extable.o params.o posix-timers.o \
kthread.o wait.o kfifo.o sys_ni.o posix-cpu-timers.o mutex.o \
- hrtimer.o rwsem.o nsproxy.o srcu.o \
+ hrtimer.o rwsem.o nsproxy.o srcu.o semaphore.o \
notifier.o ksysfs.o pm_qos_params.o
obj-$(CONFIG_SYSCTL) += sysctl_check.o
diff --git a/kernel/semaphore.c b/kernel/semaphore.c
new file mode 100644
index 0000000..32934f2
--- /dev/null
+++ b/kernel/semaphore.c
@@ -0,0 +1,204 @@
+/*
+ * Copyright (c) 2008 Intel Corporation
+ * Author: Matthew Wilcox <willy@linux.intel.com>
+ *
+ * Distributed under the terms of the GNU GPL, version 2
+ */
+
+#include <linux/compiler.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/semaphore.h>
+#include <linux/spinlock.h>
+
+/*
+ * Some notes on the implementation:
+ *
+ * down_trylock() and up() can be called from interrupt context.
+ * So we have to disable interrupts when taking the lock.
+ *
+ * The ->count variable, if positive, defines how many more tasks can
+ * acquire the semaphore. If negative, it represents how many tasks are
+ * waiting on the semaphore (*). If zero, no tasks are waiting, and no more
+ * tasks can acquire the semaphore.
+ *
+ * (*) Except for the window between one task calling up() and the task
+ * sleeping in a __down_common() waking up. In order to avoid a third task
+ * coming in and stealing the second task's wakeup, we leave the ->count
+ * negative. If we have a more complex situation, the ->count may become
+ * zero or negative (eg a semaphore with count = 2, three tasks attempt to
+ * acquire it, one sleeps, two finish and call up(), the second task to call
+ * up() notices that the list is empty and just increments count).
+ */
+
+static void noinline __down(struct semaphore *sem);
+static int noinline __down_interruptible(struct semaphore *sem);
+static int noinline __down_killable(struct semaphore *sem);
+static void noinline __up(struct semaphore *sem);
+
+void down(struct semaphore *sem)
+{
+ might_sleep();
+ spin_lock_irq(&sem->lock);
+ if (unlikely(sem->count-- <= 0))
+ __down(sem);
+ spin_unlock_irq(&sem->lock);
+}
+EXPORT_SYMBOL(down);
+
+int down_interruptible(struct semaphore *sem)
+{
+ int result = 0;
+ might_sleep();
+ spin_lock_irq(&sem->lock);
+ if (unlikely(sem->count-- <= 0))
+ result = __down_interruptible(sem);
+ spin_unlock_irq(&sem->lock);
+ return result;
+}
+EXPORT_SYMBOL(down_interruptible);
+
+int down_killable(struct semaphore *sem)
+{
+ int result = 0;
+ might_sleep();
+ spin_lock_irq(&sem->lock);
+ if (unlikely(sem->count-- <= 0))
+ result = __down_killable(sem);
+ spin_unlock_irq(&sem->lock);
+ return result;
+}
+EXPORT_SYMBOL(down_killable);
+
+/**
+ * down_trylock - try to acquire the semaphore, without waiting
+ * @sem: the semaphore to be acquired
+ *
+ * Try to acquire the semaphore atomically. Returns 0 if the mutex has
+ * been acquired successfully and 1 if it is contended.
+ *
+ * NOTE: This return value is inverted from both spin_trylock and
+ * mutex_trylock! Be careful about this when converting code.
+ *
+ * Unlike mutex_trylock, this function can be used from interrupt context,
+ * and the semaphore can be released by any task or interrupt.
+ */
+int down_trylock(struct semaphore *sem)
+{
+ unsigned long flags;
+ int count;
+
+ spin_lock_irqsave(&sem->lock, flags);
+ count = sem->count - 1;
+ if (likely(count >= 0))
+ sem->count = count;
+ spin_unlock_irqrestore(&sem->lock, flags);
+ return (count < 0);
+}
+EXPORT_SYMBOL(down_trylock);
+
+void up(struct semaphore *sem)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&sem->lock, flags);
+ if (likely(sem->count >= 0))
+ sem->count++;
+ else
+ __up(sem);
+ spin_unlock_irqrestore(&sem->lock, flags);
+}
+EXPORT_SYMBOL(up);
+
+/* Functions for the contended case */
+
+struct semaphore_waiter {
+ struct list_head list;
+ struct task_struct *task;
+ int up;
+};
+
+/*
+ * Wake up a process waiting on a semaphore. We need to call this from both
+ * __up and __down_common as it's possible to race a task into the semaphore
+ * if it comes in at just the right time between two tasks calling up() and
+ * a third task waking up. This function assumes the wait_list is already
+ * checked for being non-empty.
+ */
+static void noinline __sched __up_down_common(struct semaphore *sem)
+{
+ struct semaphore_waiter *waiter = list_first_entry(&sem->wait_list,
+ struct semaphore_waiter, list);
+ list_del(&waiter->list);
+ waiter->up = 1;
+ wake_up_process(waiter->task);
+}
+
+/*
+ * Because this function is inlined, the 'state' parameter will be constant,
+ * and thus optimised away by the compiler.
+ */
+static inline int __sched __down_common(struct semaphore *sem, long state)
+{
+ int result = 0;
+ struct task_struct *task = current;
+ struct semaphore_waiter waiter;
+
+ list_add_tail(&waiter.list, &sem->wait_list);
+ waiter.task = task;
+ waiter.up = 0;
+
+ for (;;) {
+ if (unlikely((state == TASK_INTERRUPTIBLE &&
+ signal_pending(task)) ||
+ (state == TASK_KILLABLE &&
+ fatal_signal_pending(task))))
+ goto interrupted;
+ __set_task_state(task, state);
+ spin_unlock_irq(&sem->lock);
+ schedule();
+ spin_lock_irq(&sem->lock);
+ if (waiter.up)
+ goto woken;
+ }
+
+ interrupted:
+ list_del(&waiter.list);
+ result = -EINTR;
+ woken:
+ /*
+ * Account for the process which woke us up. For the case where
+ * we're interrupted, we need to increment the count on our own
+ * behalf. I don't believe we can hit the case where the
+ * sem->count hits zero, *and* there's a second task sleeping,
+ * but it doesn't hurt, that's not a commonly exercised path and
+ * it's not a performance path either.
+ */
+ if (unlikely((++sem->count >= 0) && !list_empty(&sem->wait_list)))
+ __up_down_common(sem);
+ return result;
+}
+
+static void noinline __sched __down(struct semaphore *sem)
+{
+ __down_common(sem, TASK_UNINTERRUPTIBLE);
+}
+
+static int noinline __sched __down_interruptible(struct semaphore *sem)
+{
+ return __down_common(sem, TASK_INTERRUPTIBLE);
+}
+
+static int noinline __sched __down_killable(struct semaphore *sem)
+{
+ return __down_common(sem, TASK_KILLABLE);
+}
+
+static void noinline __sched __up(struct semaphore *sem)
+{
+ if (unlikely(list_empty(&sem->wait_list)))
+ sem->count++;
+ else
+ __up_down_common(sem);
+}
diff --git a/lib/Makefile b/lib/Makefile
index 23de261..28dba90 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -29,7 +29,6 @@ obj-$(CONFIG_DEBUG_LOCKING_API_SELFTESTS) += locking-selftest.o
obj-$(CONFIG_DEBUG_SPINLOCK) += spinlock_debug.o
lib-$(CONFIG_RWSEM_GENERIC_SPINLOCK) += rwsem-spinlock.o
lib-$(CONFIG_RWSEM_XCHGADD_ALGORITHM) += rwsem.o
-lib-$(CONFIG_SEMAPHORE_SLEEPERS) += semaphore-sleepers.o
lib-$(CONFIG_GENERIC_FIND_NEXT_BIT) += find_next_bit.o
obj-$(CONFIG_GENERIC_HWEIGHT) += hweight.o
obj-$(CONFIG_LOCK_KERNEL) += kernel_lock.o
diff --git a/lib/semaphore-sleepers.c b/lib/semaphore-sleepers.c
deleted file mode 100644
index 0198782..0000000
--- a/lib/semaphore-sleepers.c
+++ /dev/null
@@ -1,176 +0,0 @@
-/*
- * i386 and x86-64 semaphore implementation.
- *
- * (C) Copyright 1999 Linus Torvalds
- *
- * Portions Copyright 1999 Red Hat, Inc.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * rw semaphores implemented November 1999 by Benjamin LaHaise <bcrl@kvack.org>
- */
-#include <linux/sched.h>
-#include <linux/err.h>
-#include <linux/init.h>
-#include <asm/semaphore.h>
-
-/*
- * Semaphores are implemented using a two-way counter:
- * The "count" variable is decremented for each process
- * that tries to acquire the semaphore, while the "sleeping"
- * variable is a count of such acquires.
- *
- * Notably, the inline "up()" and "down()" functions can
- * efficiently test if they need to do any extra work (up
- * needs to do something only if count was negative before
- * the increment operation.
- *
- * "sleeping" and the contention routine ordering is protected
- * by the spinlock in the semaphore's waitqueue head.
- *
- * Note that these functions are only called when there is
- * contention on the lock, and as such all this is the
- * "non-critical" part of the whole semaphore business. The
- * critical part is the inline stuff in <asm/semaphore.h>
- * where we want to avoid any extra jumps and calls.
- */
-
-/*
- * Logic:
- * - only on a boundary condition do we need to care. When we go
- * from a negative count to a non-negative, we wake people up.
- * - when we go from a non-negative count to a negative do we
- * (a) synchronize with the "sleeper" count and (b) make sure
- * that we're on the wakeup list before we synchronize so that
- * we cannot lose wakeup events.
- */
-
-void __up(struct semaphore *sem)
-{
- wake_up(&sem->wait);
-}
-
-void __sched __down(struct semaphore *sem)
-{
- struct task_struct *tsk = current;
- DECLARE_WAITQUEUE(wait, tsk);
- unsigned long flags;
-
- tsk->state = TASK_UNINTERRUPTIBLE;
- spin_lock_irqsave(&sem->wait.lock, flags);
- add_wait_queue_exclusive_locked(&sem->wait, &wait);
-
- sem->sleepers++;
- for (;;) {
- int sleepers = sem->sleepers;
-
- /*
- * Add "everybody else" into it. They aren't
- * playing, because we own the spinlock in
- * the wait_queue_head.
- */
- if (!atomic_add_negative(sleepers - 1, &sem->count)) {
- sem->sleepers = 0;
- break;
- }
- sem->sleepers = 1; /* us - see -1 above */
- spin_unlock_irqrestore(&sem->wait.lock, flags);
-
- schedule();
-
- spin_lock_irqsave(&sem->wait.lock, flags);
- tsk->state = TASK_UNINTERRUPTIBLE;
- }
- remove_wait_queue_locked(&sem->wait, &wait);
- wake_up_locked(&sem->wait);
- spin_unlock_irqrestore(&sem->wait.lock, flags);
- tsk->state = TASK_RUNNING;
-}
-
-int __sched __down_interruptible(struct semaphore *sem)
-{
- int retval = 0;
- struct task_struct *tsk = current;
- DECLARE_WAITQUEUE(wait, tsk);
- unsigned long flags;
-
- tsk->state = TASK_INTERRUPTIBLE;
- spin_lock_irqsave(&sem->wait.lock, flags);
- add_wait_queue_exclusive_locked(&sem->wait, &wait);
-
- sem->sleepers++;
- for (;;) {
- int sleepers = sem->sleepers;
-
- /*
- * With signals pending, this turns into
- * the trylock failure case - we won't be
- * sleeping, and we* can't get the lock as
- * it has contention. Just correct the count
- * and exit.
- */
- if (signal_pending(current)) {
- retval = -EINTR;
- sem->sleepers = 0;
- atomic_add(sleepers, &sem->count);
- break;
- }
-
- /*
- * Add "everybody else" into it. They aren't
- * playing, because we own the spinlock in
- * wait_queue_head. The "-1" is because we're
- * still hoping to get the semaphore.
- */
- if (!atomic_add_negative(sleepers - 1, &sem->count)) {
- sem->sleepers = 0;
- break;
- }
- sem->sleepers = 1; /* us - see -1 above */
- spin_unlock_irqrestore(&sem->wait.lock, flags);
-
- schedule();
-
- spin_lock_irqsave(&sem->wait.lock, flags);
- tsk->state = TASK_INTERRUPTIBLE;
- }
- remove_wait_queue_locked(&sem->wait, &wait);
- wake_up_locked(&sem->wait);
- spin_unlock_irqrestore(&sem->wait.lock, flags);
-
- tsk->state = TASK_RUNNING;
- return retval;
-}
-
-/*
- * Trylock failed - make sure we correct for
- * having decremented the count.
- *
- * We could have done the trylock with a
- * single "cmpxchg" without failure cases,
- * but then it wouldn't work on a 386.
- */
-int __down_trylock(struct semaphore *sem)
-{
- int sleepers;
- unsigned long flags;
-
- spin_lock_irqsave(&sem->wait.lock, flags);
- sleepers = sem->sleepers + 1;
- sem->sleepers = 0;
-
- /*
- * Add "everybody else" and us into it. They aren't
- * playing, because we own the spinlock in the
- * wait_queue_head.
- */
- if (!atomic_add_negative(sleepers, &sem->count)) {
- wake_up_locked(&sem->wait);
- }
-
- spin_unlock_irqrestore(&sem->wait.lock, flags);
- return 1;
-}
--
1.5.4.1
^ permalink raw reply related [flat|nested] 30+ messages in thread
* [PATCH 12/12] Convert asm/semaphore.h users to linux/semaphore.h
2008-02-28 6:34 ` [PATCH 11/12] Generic semaphore implementation Matthew Wilcox
@ 2008-02-28 6:34 ` Matthew Wilcox
2008-02-28 7:18 ` [PATCH 11/12] Generic semaphore implementation Ingo Molnar
` (2 subsequent siblings)
3 siblings, 0 replies; 30+ messages in thread
From: Matthew Wilcox @ 2008-02-28 6:34 UTC (permalink / raw)
To: linux-kernel; +Cc: Matthew Wilcox, Matthew Wilcox
Also deprecate the asm/semaphore.h files in feature-removal-schedule.
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
---
Documentation/DocBook/kernel-locking.tmpl | 6 +++---
Documentation/feature-removal-schedule.txt | 8 ++++++++
arch/ia64/kernel/salinfo.c | 2 +-
drivers/base/core.c | 2 +-
drivers/char/snsc.h | 2 +-
drivers/char/xilinx_hwicap/xilinx_hwicap.c | 2 +-
drivers/firewire/fw-device.c | 2 +-
drivers/i2c/i2c-core.c | 2 +-
drivers/ieee1394/nodemgr.c | 2 +-
drivers/infiniband/core/user_mad.c | 2 +-
drivers/infiniband/hw/mthca/mthca_dev.h | 3 +--
drivers/input/serio/hp_sdc_mlc.c | 2 +-
drivers/macintosh/adb.c | 2 +-
drivers/macintosh/windfarm_smu_sat.c | 2 +-
drivers/net/3c527.c | 2 +-
drivers/net/hamradio/6pack.c | 2 +-
drivers/s390/cio/qdio.c | 2 +-
drivers/scsi/aacraid/commctrl.c | 2 +-
drivers/scsi/aacraid/commsup.c | 2 +-
drivers/scsi/aacraid/dpcsup.c | 2 +-
drivers/scsi/megaraid/megaraid_ioctl.h | 2 +-
drivers/scsi/qla2xxx/qla_def.h | 2 +-
drivers/watchdog/sc1200wdt.c | 2 +-
fs/jffs2/jffs2_fs_i.h | 2 +-
fs/jffs2/jffs2_fs_sb.h | 2 +-
fs/reiserfs/journal.c | 2 +-
fs/xfs/linux-2.6/sema.h | 2 +-
include/linux/device.h | 2 +-
include/linux/fs.h | 2 +-
include/linux/hil_mlc.h | 2 +-
include/linux/i2o.h | 2 +-
include/linux/memory.h | 3 +--
include/linux/parport.h | 2 +-
lib/kernel_lock.c | 2 +-
net/tipc/socket.c | 2 +-
35 files changed, 44 insertions(+), 38 deletions(-)
diff --git a/Documentation/DocBook/kernel-locking.tmpl b/Documentation/DocBook/kernel-locking.tmpl
index 2e9d6b4..b1ab442 100644
--- a/Documentation/DocBook/kernel-locking.tmpl
+++ b/Documentation/DocBook/kernel-locking.tmpl
@@ -241,7 +241,7 @@
</para>
<para>
The third type is a semaphore
- (<filename class="headerfile">include/asm/semaphore.h</filename>): it
+ (<filename class="headerfile">include/linux/semaphore.h</filename>): it
can have more than one holder at any time (the number decided at
initialization time), although it is most commonly used as a
single-holder lock (a mutex). If you can't get a semaphore, your
@@ -290,7 +290,7 @@
<para>
If you have a data structure which is only ever accessed from
user context, then you can use a simple semaphore
- (<filename>linux/asm/semaphore.h</filename>) to protect it. This
+ (<filename>linux/linux/semaphore.h</filename>) to protect it. This
is the most trivial case: you initialize the semaphore to the number
of resources available (usually 1), and call
<function>down_interruptible()</function> to grab the semaphore, and
@@ -1656,7 +1656,7 @@ the amount of locking which needs to be done.
#include <linux/slab.h>
#include <linux/string.h>
+#include <linux/rcupdate.h>
- #include <asm/semaphore.h>
+ #include <linux/semaphore.h>
#include <asm/errno.h>
struct object
diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt
index 4d3aa51..c43cba9 100644
--- a/Documentation/feature-removal-schedule.txt
+++ b/Documentation/feature-removal-schedule.txt
@@ -306,3 +306,11 @@ Why: Largely unmaintained and almost entirely unused. File system
is largely pointless as without a lot of work only the most
trivial of Solaris binaries can work with the emulation code.
Who: David S. Miller <davem@davemloft.net>
+
+---------------------------
+
+What: asm/semaphore.h
+When: 2.6.26
+Why: Implementation became generic; users should now include
+ linux/semaphore.h instead.
+Who: Matthew Wilcox <willy@linux.intel.com>
diff --git a/arch/ia64/kernel/salinfo.c b/arch/ia64/kernel/salinfo.c
index 779c3cc..b11bb50 100644
--- a/arch/ia64/kernel/salinfo.c
+++ b/arch/ia64/kernel/salinfo.c
@@ -44,8 +44,8 @@
#include <linux/smp.h>
#include <linux/timer.h>
#include <linux/vmalloc.h>
+#include <linux/semaphore.h>
-#include <asm/semaphore.h>
#include <asm/sal.h>
#include <asm/uaccess.h>
diff --git a/drivers/base/core.c b/drivers/base/core.c
index 9c0070b..1a37406 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -19,7 +19,7 @@
#include <linux/kdev_t.h>
#include <linux/notifier.h>
#include <linux/genhd.h>
-#include <asm/semaphore.h>
+#include <linux/semaphore.h>
#include "base.h"
#include "power/power.h"
diff --git a/drivers/char/snsc.h b/drivers/char/snsc.h
index 8a98169..4be62ed 100644
--- a/drivers/char/snsc.h
+++ b/drivers/char/snsc.h
@@ -22,8 +22,8 @@
#include <linux/kobject.h>
#include <linux/fs.h>
#include <linux/cdev.h>
+#include <linux/semaphore.h>
#include <asm/sn/types.h>
-#include <asm/semaphore.h>
#define CHUNKSIZE 127
diff --git a/drivers/char/xilinx_hwicap/xilinx_hwicap.c b/drivers/char/xilinx_hwicap/xilinx_hwicap.c
index 24f6aef..68df07f 100644
--- a/drivers/char/xilinx_hwicap/xilinx_hwicap.c
+++ b/drivers/char/xilinx_hwicap/xilinx_hwicap.c
@@ -84,7 +84,7 @@
#include <linux/init.h>
#include <linux/poll.h>
#include <linux/proc_fs.h>
-#include <asm/semaphore.h>
+#include <linux/semaphore.h>
#include <linux/sysctl.h>
#include <linux/version.h>
#include <linux/fs.h>
diff --git a/drivers/firewire/fw-device.c b/drivers/firewire/fw-device.c
index 2ab13e0..79fb504 100644
--- a/drivers/firewire/fw-device.c
+++ b/drivers/firewire/fw-device.c
@@ -26,7 +26,7 @@
#include <linux/delay.h>
#include <linux/idr.h>
#include <linux/rwsem.h>
-#include <asm/semaphore.h>
+#include <linux/semaphore.h>
#include <asm/system.h>
#include <linux/ctype.h>
#include "fw-transaction.h"
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index 96da22e..d8de1b0 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -35,8 +35,8 @@
#include <linux/completion.h>
#include <linux/hardirq.h>
#include <linux/irqflags.h>
+#include <linux/semaphore.h>
#include <asm/uaccess.h>
-#include <asm/semaphore.h>
#include "i2c-core.h"
diff --git a/drivers/ieee1394/nodemgr.c b/drivers/ieee1394/nodemgr.c
index 511e432..a6183e5 100644
--- a/drivers/ieee1394/nodemgr.c
+++ b/drivers/ieee1394/nodemgr.c
@@ -18,8 +18,8 @@
#include <linux/moduleparam.h>
#include <linux/mutex.h>
#include <linux/freezer.h>
+#include <linux/semaphore.h>
#include <asm/atomic.h>
-#include <asm/semaphore.h>
#include "csr.h"
#include "highlevel.h"
diff --git a/drivers/infiniband/core/user_mad.c b/drivers/infiniband/core/user_mad.c
index 4e91510..be953e8 100644
--- a/drivers/infiniband/core/user_mad.c
+++ b/drivers/infiniband/core/user_mad.c
@@ -46,9 +46,9 @@
#include <linux/mutex.h>
#include <linux/kref.h>
#include <linux/compat.h>
+#include <linux/semaphore.h>
#include <asm/uaccess.h>
-#include <asm/semaphore.h>
#include <rdma/ib_mad.h>
#include <rdma/ib_user_mad.h>
diff --git a/drivers/infiniband/hw/mthca/mthca_dev.h b/drivers/infiniband/hw/mthca/mthca_dev.h
index 7bbdd1f..ad8861a 100644
--- a/drivers/infiniband/hw/mthca/mthca_dev.h
+++ b/drivers/infiniband/hw/mthca/mthca_dev.h
@@ -46,8 +46,7 @@
#include <linux/timer.h>
#include <linux/mutex.h>
#include <linux/list.h>
-
-#include <asm/semaphore.h>
+#include <linux/semaphore.h>
#include "mthca_provider.h"
#include "mthca_doorbell.h"
diff --git a/drivers/input/serio/hp_sdc_mlc.c b/drivers/input/serio/hp_sdc_mlc.c
index c45ea74..f1fd3b6 100644
--- a/drivers/input/serio/hp_sdc_mlc.c
+++ b/drivers/input/serio/hp_sdc_mlc.c
@@ -40,7 +40,7 @@
#include <linux/module.h>
#include <linux/init.h>
#include <linux/string.h>
-#include <asm/semaphore.h>
+#include <linux/semaphore.h>
#define PREFIX "HP SDC MLC: "
diff --git a/drivers/macintosh/adb.c b/drivers/macintosh/adb.c
index 2895810..2097820 100644
--- a/drivers/macintosh/adb.c
+++ b/drivers/macintosh/adb.c
@@ -37,9 +37,9 @@
#include <linux/device.h>
#include <linux/kthread.h>
#include <linux/platform_device.h>
+#include <linux/semaphore.h>
#include <asm/uaccess.h>
-#include <asm/semaphore.h>
#ifdef CONFIG_PPC
#include <asm/prom.h>
#include <asm/machdep.h>
diff --git a/drivers/macintosh/windfarm_smu_sat.c b/drivers/macintosh/windfarm_smu_sat.c
index f449d77..797918d 100644
--- a/drivers/macintosh/windfarm_smu_sat.c
+++ b/drivers/macintosh/windfarm_smu_sat.c
@@ -13,7 +13,7 @@
#include <linux/init.h>
#include <linux/wait.h>
#include <linux/i2c.h>
-#include <asm/semaphore.h>
+#include <linux/semaphore.h>
#include <asm/prom.h>
#include <asm/smu.h>
#include <asm/pmac_low_i2c.h>
diff --git a/drivers/net/3c527.c b/drivers/net/3c527.c
index b72b89d..fae295b 100644
--- a/drivers/net/3c527.c
+++ b/drivers/net/3c527.c
@@ -103,8 +103,8 @@ DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " Richard Procter <rnp@paradise.net.
#include <linux/ethtool.h>
#include <linux/completion.h>
#include <linux/bitops.h>
+#include <linux/semaphore.h>
-#include <asm/semaphore.h>
#include <asm/uaccess.h>
#include <asm/system.h>
#include <asm/io.h>
diff --git a/drivers/net/hamradio/6pack.c b/drivers/net/hamradio/6pack.c
index 0a9b751..1da55dd 100644
--- a/drivers/net/hamradio/6pack.c
+++ b/drivers/net/hamradio/6pack.c
@@ -33,7 +33,7 @@
#include <linux/init.h>
#include <linux/ip.h>
#include <linux/tcp.h>
-#include <asm/semaphore.h>
+#include <linux/semaphore.h>
#include <asm/atomic.h>
#define SIXPACK_VERSION "Revision: 0.3.0"
diff --git a/drivers/s390/cio/qdio.c b/drivers/s390/cio/qdio.c
index 2b5bfb7..9a85422 100644
--- a/drivers/s390/cio/qdio.c
+++ b/drivers/s390/cio/qdio.c
@@ -38,11 +38,11 @@
#include <linux/proc_fs.h>
#include <linux/timer.h>
#include <linux/mempool.h>
+#include <linux/semaphore.h>
#include <asm/ccwdev.h>
#include <asm/io.h>
#include <asm/atomic.h>
-#include <asm/semaphore.h>
#include <asm/timex.h>
#include <asm/debug.h>
diff --git a/drivers/scsi/aacraid/commctrl.c b/drivers/scsi/aacraid/commctrl.c
index abef051..5fd83de 100644
--- a/drivers/scsi/aacraid/commctrl.c
+++ b/drivers/scsi/aacraid/commctrl.c
@@ -39,7 +39,7 @@
#include <linux/blkdev.h>
#include <linux/delay.h> /* ssleep prototype */
#include <linux/kthread.h>
-#include <asm/semaphore.h>
+#include <linux/semaphore.h>
#include <asm/uaccess.h>
#include "aacraid.h"
diff --git a/drivers/scsi/aacraid/commsup.c b/drivers/scsi/aacraid/commsup.c
index 4743449..3753835 100644
--- a/drivers/scsi/aacraid/commsup.c
+++ b/drivers/scsi/aacraid/commsup.c
@@ -41,11 +41,11 @@
#include <linux/delay.h>
#include <linux/kthread.h>
#include <linux/interrupt.h>
+#include <linux/semaphore.h>
#include <scsi/scsi.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_cmnd.h>
-#include <asm/semaphore.h>
#include "aacraid.h"
diff --git a/drivers/scsi/aacraid/dpcsup.c b/drivers/scsi/aacraid/dpcsup.c
index d1163de..933f208 100644
--- a/drivers/scsi/aacraid/dpcsup.c
+++ b/drivers/scsi/aacraid/dpcsup.c
@@ -36,7 +36,7 @@
#include <linux/slab.h>
#include <linux/completion.h>
#include <linux/blkdev.h>
-#include <asm/semaphore.h>
+#include <linux/semaphore.h>
#include "aacraid.h"
diff --git a/drivers/scsi/megaraid/megaraid_ioctl.h b/drivers/scsi/megaraid/megaraid_ioctl.h
index 706fa05..05f6e4e 100644
--- a/drivers/scsi/megaraid/megaraid_ioctl.h
+++ b/drivers/scsi/megaraid/megaraid_ioctl.h
@@ -18,7 +18,7 @@
#define _MEGARAID_IOCTL_H_
#include <linux/types.h>
-#include <asm/semaphore.h>
+#include <linux/semaphore.h>
#include "mbox_defs.h"
diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h
index 3750319..97aa48d 100644
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -24,7 +24,7 @@
#include <linux/workqueue.h>
#include <linux/firmware.h>
#include <linux/aer.h>
-#include <asm/semaphore.h>
+#include <linux/semaphore.h>
#include <scsi/scsi.h>
#include <scsi/scsi_host.h>
diff --git a/drivers/watchdog/sc1200wdt.c b/drivers/watchdog/sc1200wdt.c
index 32ccd7c..35cddff 100644
--- a/drivers/watchdog/sc1200wdt.c
+++ b/drivers/watchdog/sc1200wdt.c
@@ -38,8 +38,8 @@
#include <linux/init.h>
#include <linux/pnp.h>
#include <linux/fs.h>
+#include <linux/semaphore.h>
-#include <asm/semaphore.h>
#include <asm/io.h>
#include <asm/uaccess.h>
diff --git a/fs/jffs2/jffs2_fs_i.h b/fs/jffs2/jffs2_fs_i.h
index 0b78fdc..a841f49 100644
--- a/fs/jffs2/jffs2_fs_i.h
+++ b/fs/jffs2/jffs2_fs_i.h
@@ -15,7 +15,7 @@
#include <linux/version.h>
#include <linux/rbtree.h>
#include <linux/posix_acl.h>
-#include <asm/semaphore.h>
+#include <linux/semaphore.h>
struct jffs2_inode_info {
/* We need an internal mutex similar to inode->i_mutex.
diff --git a/fs/jffs2/jffs2_fs_sb.h b/fs/jffs2/jffs2_fs_sb.h
index 3a2197f..18fca2b 100644
--- a/fs/jffs2/jffs2_fs_sb.h
+++ b/fs/jffs2/jffs2_fs_sb.h
@@ -16,7 +16,7 @@
#include <linux/spinlock.h>
#include <linux/workqueue.h>
#include <linux/completion.h>
-#include <asm/semaphore.h>
+#include <linux/semaphore.h>
#include <linux/timer.h>
#include <linux/wait.h>
#include <linux/list.h>
diff --git a/fs/reiserfs/journal.c b/fs/reiserfs/journal.c
index bb05a3e..060eb3f 100644
--- a/fs/reiserfs/journal.c
+++ b/fs/reiserfs/journal.c
@@ -38,7 +38,7 @@
#include <asm/system.h>
#include <linux/time.h>
-#include <asm/semaphore.h>
+#include <linux/semaphore.h>
#include <linux/vmalloc.h>
#include <linux/reiserfs_fs.h>
diff --git a/fs/xfs/linux-2.6/sema.h b/fs/xfs/linux-2.6/sema.h
index 2009e6d..3abe7e9 100644
--- a/fs/xfs/linux-2.6/sema.h
+++ b/fs/xfs/linux-2.6/sema.h
@@ -20,8 +20,8 @@
#include <linux/time.h>
#include <linux/wait.h>
+#include <linux/semaphore.h>
#include <asm/atomic.h>
-#include <asm/semaphore.h>
/*
* sema_t structure just maps to struct semaphore in Linux kernel.
diff --git a/include/linux/device.h b/include/linux/device.h
index 2258d89..c79b93e 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -20,7 +20,7 @@
#include <linux/types.h>
#include <linux/module.h>
#include <linux/pm.h>
-#include <asm/semaphore.h>
+#include <linux/semaphore.h>
#include <asm/atomic.h>
#include <asm/device.h>
diff --git a/include/linux/fs.h b/include/linux/fs.h
index b84b848..91e8dec 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -287,9 +287,9 @@ extern int dir_notify_enable;
#include <linux/pid.h>
#include <linux/mutex.h>
#include <linux/capability.h>
+#include <linux/semaphore.h>
#include <asm/atomic.h>
-#include <asm/semaphore.h>
#include <asm/byteorder.h>
struct export_operations;
diff --git a/include/linux/hil_mlc.h b/include/linux/hil_mlc.h
index 8df29ca..394a840 100644
--- a/include/linux/hil_mlc.h
+++ b/include/linux/hil_mlc.h
@@ -34,7 +34,7 @@
#include <linux/hil.h>
#include <linux/time.h>
#include <linux/interrupt.h>
-#include <asm/semaphore.h>
+#include <linux/semaphore.h>
#include <linux/serio.h>
#include <linux/list.h>
diff --git a/include/linux/i2o.h b/include/linux/i2o.h
index 7da5b98..e92170d 100644
--- a/include/linux/i2o.h
+++ b/include/linux/i2o.h
@@ -33,9 +33,9 @@
#include <linux/mempool.h>
#include <linux/mutex.h>
#include <linux/scatterlist.h>
+#include <linux/semaphore.h> /* Needed for MUTEX init macros */
#include <asm/io.h>
-#include <asm/semaphore.h> /* Needed for MUTEX init macros */
/* message queue empty */
#define I2O_QUEUE_EMPTY 0xffffffff
diff --git a/include/linux/memory.h b/include/linux/memory.h
index 33f0ff0..54d7866 100644
--- a/include/linux/memory.h
+++ b/include/linux/memory.h
@@ -18,8 +18,7 @@
#include <linux/sysdev.h>
#include <linux/node.h>
#include <linux/compiler.h>
-
-#include <asm/semaphore.h>
+#include <linux/semaphore.h>
struct memory_block {
unsigned long phys_index;
diff --git a/include/linux/parport.h b/include/linux/parport.h
index d1ad546..dcb9e01 100644
--- a/include/linux/parport.h
+++ b/include/linux/parport.h
@@ -101,9 +101,9 @@ typedef enum {
#include <linux/spinlock.h>
#include <linux/wait.h>
#include <linux/irqreturn.h>
+#include <linux/semaphore.h>
#include <asm/system.h>
#include <asm/ptrace.h>
-#include <asm/semaphore.h>
/* Define this later. */
struct parport;
diff --git a/lib/kernel_lock.c b/lib/kernel_lock.c
index fbc11a3..cd3e825 100644
--- a/lib/kernel_lock.c
+++ b/lib/kernel_lock.c
@@ -8,7 +8,7 @@
#include <linux/smp_lock.h>
#include <linux/module.h>
#include <linux/kallsyms.h>
-#include <asm/semaphore.h>
+#include <linux/semaphore.h>
/*
* The 'big kernel semaphore'
diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index 2290903..6e3f0d3 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -43,7 +43,7 @@
#include <linux/slab.h>
#include <linux/poll.h>
#include <linux/fcntl.h>
-#include <asm/semaphore.h>
+#include <linux/semaphore.h>
#include <asm/string.h>
#include <asm/atomic.h>
#include <net/sock.h>
--
1.5.4.1
^ permalink raw reply related [flat|nested] 30+ messages in thread
* Re: [PATCH 11/12] Generic semaphore implementation
2008-02-28 6:34 ` [PATCH 11/12] Generic semaphore implementation Matthew Wilcox
2008-02-28 6:34 ` [PATCH 12/12] Convert asm/semaphore.h users to linux/semaphore.h Matthew Wilcox
@ 2008-02-28 7:18 ` Ingo Molnar
2008-02-29 0:39 ` Matthew Wilcox
2008-02-29 1:57 ` Andrew Morton
2008-02-29 2:37 ` Harvey Harrison
3 siblings, 1 reply; 30+ messages in thread
From: Ingo Molnar @ 2008-02-28 7:18 UTC (permalink / raw)
To: Matthew Wilcox; +Cc: linux-kernel, Matthew Wilcox, Thomas Gleixner
* Matthew Wilcox <matthew@wil.cx> wrote:
> Semaphores are no longer performance-critical, so a generic C
> implementation is better for maintainability, debuggability and
> extensibility.
>
> Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
very nice work!
Acked-by: Ingo Molnar <mingo@elte.hu>
Ingo
^ permalink raw reply [flat|nested] 30+ messages in thread
* Re: [PATCH 11/12] Generic semaphore implementation
2008-02-28 7:18 ` [PATCH 11/12] Generic semaphore implementation Ingo Molnar
@ 2008-02-29 0:39 ` Matthew Wilcox
2008-02-29 0:50 ` Harvey Harrison
` (2 more replies)
0 siblings, 3 replies; 30+ messages in thread
From: Matthew Wilcox @ 2008-02-29 0:39 UTC (permalink / raw)
To: Ingo Molnar, Stephen Rothwell
Cc: linux-kernel, Matthew Wilcox, Thomas Gleixner, Andrew Morton
On Thu, Feb 28, 2008 at 08:18:23AM +0100, Ingo Molnar wrote:
> very nice work!
>
> Acked-by: Ingo Molnar <mingo@elte.hu>
Thanks!
Stephen, I've put the semaphore patches into a git tree; can you add it
to linux-next?
http://git.kernel.org/?p=linux/kernel/git/willy/misc.git;a=shortlog;h=semaphore
--
Intel are signing my paycheques ... these opinions are still mine
"Bill, look, we understand that you're interested in selling us this
operating system, but compare it to ours. We can't possibly take such
a retrograde step."
^ permalink raw reply [flat|nested] 30+ messages in thread
* Re: [PATCH 11/12] Generic semaphore implementation
2008-02-29 0:39 ` Matthew Wilcox
@ 2008-02-29 0:50 ` Harvey Harrison
2008-02-29 1:43 ` Andrew Morton
2008-02-29 2:00 ` Stephen Rothwell
2 siblings, 0 replies; 30+ messages in thread
From: Harvey Harrison @ 2008-02-29 0:50 UTC (permalink / raw)
To: Matthew Wilcox
Cc: Ingo Molnar, Stephen Rothwell, linux-kernel, Matthew Wilcox,
Thomas Gleixner, Andrew Morton
On Thu, 2008-02-28 at 17:39 -0700, Matthew Wilcox wrote:
> On Thu, Feb 28, 2008 at 08:18:23AM +0100, Ingo Molnar wrote:
> > very nice work!
> >
> > Acked-by: Ingo Molnar <mingo@elte.hu>
>
> Thanks!
>
> Stephen, I've put the semaphore patches into a git tree; can you add it
> to linux-next?
>
> http://git.kernel.org/?p=linux/kernel/git/willy/misc.git;a=shortlog;h=semaphore
>
The gitweb links aren't so useful for people to grab your tree, the
format usually preferred is <url> <branchname>
ie:
git://git.kernel.org/pub/scm/linux/kernel/git/willy/misc.git semaphore
Cheers,
Harvey
^ permalink raw reply [flat|nested] 30+ messages in thread
* Re: [PATCH 11/12] Generic semaphore implementation
2008-02-29 0:39 ` Matthew Wilcox
2008-02-29 0:50 ` Harvey Harrison
@ 2008-02-29 1:43 ` Andrew Morton
2008-02-29 5:30 ` Matthew Wilcox
` (2 more replies)
2008-02-29 2:00 ` Stephen Rothwell
2 siblings, 3 replies; 30+ messages in thread
From: Andrew Morton @ 2008-02-29 1:43 UTC (permalink / raw)
To: Matthew Wilcox
Cc: Ingo Molnar, Stephen Rothwell, linux-kernel, Matthew Wilcox,
Thomas Gleixner, linux-arch
On Thu, 28 Feb 2008 17:39:54 -0700 Matthew Wilcox <matthew@wil.cx> wrote:
> On Thu, Feb 28, 2008 at 08:18:23AM +0100, Ingo Molnar wrote:
> > very nice work!
> >
> > Acked-by: Ingo Molnar <mingo@elte.hu>
>
> Thanks!
>
> Stephen, I've put the semaphore patches into a git tree; can you add it
> to linux-next?
>
> http://git.kernel.org/?p=linux/kernel/git/willy/misc.git;a=shortlog;h=semaphore
>
err, we'd better tell the arch maintainers than we just deleted all their
sempahore code.
edited list:
arch/alpha/kernel/semaphore.c | 224 --------------------
arch/arm/kernel/semaphore.c | 221 --------------------
arch/avr32/kernel/semaphore.c | 148 -------------
arch/cris/kernel/semaphore.c | 129 -----------
arch/frv/kernel/semaphore.c | 155 --------------
arch/h8300/kernel/semaphore.c | 132 -----------
arch/ia64/kernel/semaphore.c | 165 --------------
arch/m32r/kernel/semaphore.c | 185 ----------------
arch/m68k/kernel/semaphore.c | 132 -----------
arch/m68k/lib/semaphore.S | 53 ----
arch/m68knommu/kernel/semaphore.c | 133 ------------
arch/m68knommu/lib/semaphore.S | 66 -----
arch/mips/kernel/semaphore.c | 168 ---------------
arch/mn10300/kernel/semaphore.c | 149 -------------
arch/parisc/kernel/semaphore.c | 102 ---------
arch/powerpc/kernel/semaphore.c | 135 ------------
arch/ppc/kernel/semaphore.c | 131 -----------
arch/s390/kernel/semaphore.c | 108 ---------
arch/sh/kernel/semaphore.c | 139 ------------
arch/sparc/kernel/semaphore.c | 155 --------------
arch/sparc64/kernel/semaphore.c | 254 -----------------------
arch/v850/kernel/semaphore.c | 166 ---------------
arch/xtensa/kernel/semaphore.c | 226 --------------------
b/arch/x86/lib/semaphore_32.S | 83 -------
b/include/asm-alpha/semaphore.h | 150 -------------
b/include/asm-arm/semaphore.h | 99 --------
b/include/asm-avr32/semaphore.h | 109 ---------
b/include/asm-blackfin/semaphore.h | 106 ---------
b/include/asm-cris/semaphore.h | 134 ------------
b/include/asm-frv/semaphore.h | 156 --------------
b/include/asm-h8300/semaphore.h | 191 -----------------
b/include/asm-ia64/semaphore.h | 100 ---------
b/include/asm-m32r/semaphore.h | 145 -------------
b/include/asm-m68k/semaphore.h | 164 --------------
b/include/asm-m68knommu/semaphore.h | 154 -------------
b/include/asm-mips/semaphore.h | 109 ---------
b/include/asm-mn10300/semaphore.h | 170 ---------------
b/include/asm-parisc/semaphore.h | 146 -------------
b/include/asm-powerpc/semaphore.h | 95 --------
b/include/asm-s390/semaphore.h | 108 ---------
b/include/asm-sh/semaphore.h | 116 ----------
b/include/asm-sparc/semaphore.h | 193 -----------------
b/include/asm-sparc64/semaphore.h | 54 ----
b/include/asm-v850/semaphore.h | 85 -------
b/include/asm-xtensa/semaphore.h | 100 ---------
b/include/linux/semaphore.h | 81 +++++++
b/kernel/semaphore.c | 204 ++++++++++++++++++
include/asm-arm/semaphore-helper.h | 84 -------
include/asm-blackfin/semaphore-helper.h | 82 -------
include/asm-cris/semaphore-helper.h | 78 -------
include/asm-h8300/semaphore-helper.h | 85 -------
include/asm-m68k/semaphore-helper.h | 142 ------------
include/asm-m68knommu/semaphore-helper.h | 82 -------
include/asm-parisc/semaphore-helper.h | 89 --------
include/asm-sh/semaphore-helper.h | 89 --------
include/asm-x86/semaphore_32.h | 175 ---------------
include/asm-x86/semaphore_64.h | 180 ----------------
lib/semaphore-sleepers.c | 176 ---------------
yummy summary:
254 files changed, 386 insertions(+), 7827 deletions(-)
The only major conflict is with avr32 which seems to have just done a major
revamp of that architecture's semaphore implementation. Oh well.
There are a couple of small #include rejects here and there, nothing at all
major.
Yes, let's get this into linux-next if poss please. If mainline later
breaks for some architecture, well, we did our best..
^ permalink raw reply [flat|nested] 30+ messages in thread
* Re: [PATCH 11/12] Generic semaphore implementation
2008-02-28 6:34 ` [PATCH 11/12] Generic semaphore implementation Matthew Wilcox
2008-02-28 6:34 ` [PATCH 12/12] Convert asm/semaphore.h users to linux/semaphore.h Matthew Wilcox
2008-02-28 7:18 ` [PATCH 11/12] Generic semaphore implementation Ingo Molnar
@ 2008-02-29 1:57 ` Andrew Morton
2008-02-29 5:43 ` Matthew Wilcox
2008-02-29 2:37 ` Harvey Harrison
3 siblings, 1 reply; 30+ messages in thread
From: Andrew Morton @ 2008-02-29 1:57 UTC (permalink / raw)
To: Matthew Wilcox; +Cc: linux-kernel, Matthew Wilcox, linux-arch
On Thu, 28 Feb 2008 01:34:00 -0500 Matthew Wilcox <matthew@wil.cx> wrote:
> Semaphores are no longer performance-critical, so a generic C
> implementation is better for maintainability, debuggability and
> extensibility.
>
This make all architectures use the lib/semaphore-sleepers.c
implementation. The major difference is that down() and up() will now
unconditionally do a spin_lock_irq[save]() on the not-contended fastpath,
whereas the hand-optimised arch-specific implementations would avoid that.
Yes, hopefully not many sempahores are used on fastpaths any more, and a
suitable fix for any which _are_ so used is usually convert-to-mutex.
And spin_lock_irqsave() probably isn't hugely slower than an atomic-dec
anyway.
A few nits, most or all of which pertain to the old code:
> --- /dev/null
> +++ b/kernel/semaphore.c
> @@ -0,0 +1,204 @@
> +/*
> + * Copyright (c) 2008 Intel Corporation
> + * Author: Matthew Wilcox <willy@linux.intel.com>
> + *
> + * Distributed under the terms of the GNU GPL, version 2
> + */
> +
> +#include <linux/compiler.h>
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/sched.h>
> +#include <linux/semaphore.h>
> +#include <linux/spinlock.h>
> +
> +/*
> + * Some notes on the implementation:
> + *
> + * down_trylock() and up() can be called from interrupt context.
> + * So we have to disable interrupts when taking the lock.
> + *
> + * The ->count variable, if positive, defines how many more tasks can
> + * acquire the semaphore. If negative, it represents how many tasks are
> + * waiting on the semaphore (*). If zero, no tasks are waiting, and no more
> + * tasks can acquire the semaphore.
> + *
> + * (*) Except for the window between one task calling up() and the task
> + * sleeping in a __down_common() waking up. In order to avoid a third task
> + * coming in and stealing the second task's wakeup, we leave the ->count
> + * negative. If we have a more complex situation, the ->count may become
> + * zero or negative (eg a semaphore with count = 2, three tasks attempt to
> + * acquire it, one sleeps, two finish and call up(), the second task to call
> + * up() notices that the list is empty and just increments count).
> + */
> +
> +static void noinline __down(struct semaphore *sem);
> +static int noinline __down_interruptible(struct semaphore *sem);
> +static int noinline __down_killable(struct semaphore *sem);
> +static void noinline __up(struct semaphore *sem);
We conventionally do `static inline void' rather than `static void inline',
so I guess we should do `static noinline void' too.
> +int down_interruptible(struct semaphore *sem)
> +{
> + int result = 0;
> + might_sleep();
> + spin_lock_irq(&sem->lock);
> + if (unlikely(sem->count-- <= 0))
> + result = __down_interruptible(sem);
> + spin_unlock_irq(&sem->lock);
> + return result;
> +}
> +EXPORT_SYMBOL(down_interruptible);
Some functions leave no blank line between end-of-locals and start-of-code...
> +int down_killable(struct semaphore *sem)
> +{
> + int result = 0;
> + might_sleep();
> + spin_lock_irq(&sem->lock);
> + if (unlikely(sem->count-- <= 0))
> + result = __down_killable(sem);
> + spin_unlock_irq(&sem->lock);
> + return result;
> +}
> +EXPORT_SYMBOL(down_killable);
> +
> +/**
> + * down_trylock - try to acquire the semaphore, without waiting
> + * @sem: the semaphore to be acquired
> + *
> + * Try to acquire the semaphore atomically. Returns 0 if the mutex has
> + * been acquired successfully and 1 if it is contended.
> + *
> + * NOTE: This return value is inverted from both spin_trylock and
> + * mutex_trylock! Be careful about this when converting code.
> + *
> + * Unlike mutex_trylock, this function can be used from interrupt context,
> + * and the semaphore can be released by any task or interrupt.
> + */
> +int down_trylock(struct semaphore *sem)
> +{
> + unsigned long flags;
> + int count;
> +
> + spin_lock_irqsave(&sem->lock, flags);
> + count = sem->count - 1;
> + if (likely(count >= 0))
> + sem->count = count;
> + spin_unlock_irqrestore(&sem->lock, flags);
> + return (count < 0);
> +}
> +EXPORT_SYMBOL(down_trylock);
whereas some others do leave a blank line.
I think the 51% consensus is that the latter form is preferred.
> +void up(struct semaphore *sem)
> +{
> + unsigned long flags;
> +
> + spin_lock_irqsave(&sem->lock, flags);
> + if (likely(sem->count >= 0))
> + sem->count++;
> + else
> + __up(sem);
> + spin_unlock_irqrestore(&sem->lock, flags);
> +}
> +EXPORT_SYMBOL(up);
> +
> +/* Functions for the contended case */
> +
> +struct semaphore_waiter {
> + struct list_head list;
> + struct task_struct *task;
> + int up;
> +};
> +
> +/*
> + * Wake up a process waiting on a semaphore. We need to call this from both
> + * __up and __down_common as it's possible to race a task into the semaphore
> + * if it comes in at just the right time between two tasks calling up() and
> + * a third task waking up. This function assumes the wait_list is already
> + * checked for being non-empty.
> + */
> +static void noinline __sched __up_down_common(struct semaphore *sem)
> +{
> + struct semaphore_waiter *waiter = list_first_entry(&sem->wait_list,
> + struct semaphore_waiter, list);
> + list_del(&waiter->list);
> + waiter->up = 1;
hm. Do we need a barrier here?
> + wake_up_process(waiter->task);
> +}
> +
> +/*
> + * Because this function is inlined, the 'state' parameter will be constant,
> + * and thus optimised away by the compiler.
> + */
> +static inline int __sched __down_common(struct semaphore *sem, long state)
> +{
> + int result = 0;
> + struct task_struct *task = current;
> + struct semaphore_waiter waiter;
> +
> + list_add_tail(&waiter.list, &sem->wait_list);
> + waiter.task = task;
> + waiter.up = 0;
> +
> + for (;;) {
> + if (unlikely((state == TASK_INTERRUPTIBLE &&
> + signal_pending(task)) ||
> + (state == TASK_KILLABLE &&
> + fatal_signal_pending(task))))
> + goto interrupted;
> + __set_task_state(task, state);
> + spin_unlock_irq(&sem->lock);
> + schedule();
> + spin_lock_irq(&sem->lock);
> + if (waiter.up)
> + goto woken;
> + }
> +
> + interrupted:
> + list_del(&waiter.list);
> + result = -EINTR;
> + woken:
> + /*
> + * Account for the process which woke us up. For the case where
> + * we're interrupted, we need to increment the count on our own
> + * behalf. I don't believe we can hit the case where the
> + * sem->count hits zero, *and* there's a second task sleeping,
> + * but it doesn't hurt, that's not a commonly exercised path and
> + * it's not a performance path either.
> + */
> + if (unlikely((++sem->count >= 0) && !list_empty(&sem->wait_list)))
> + __up_down_common(sem);
> + return result;
> +}
That is one huuuuuuuge inline. Are we sure it's justified?
> +static void noinline __sched __down(struct semaphore *sem)
> +{
> + __down_common(sem, TASK_UNINTERRUPTIBLE);
> +}
> +
> +static int noinline __sched __down_interruptible(struct semaphore *sem)
> +{
> + return __down_common(sem, TASK_INTERRUPTIBLE);
> +}
> +
> +static int noinline __sched __down_killable(struct semaphore *sem)
> +{
> + return __down_common(sem, TASK_KILLABLE);
> +}
> +
> +static void noinline __sched __up(struct semaphore *sem)
> +{
> + if (unlikely(list_empty(&sem->wait_list)))
> + sem->count++;
> + else
> + __up_down_common(sem);
> +}
> Please read the FAQ at http://www.tux.org/lkml/
^ permalink raw reply [flat|nested] 30+ messages in thread
* Re: [PATCH 11/12] Generic semaphore implementation
2008-02-29 0:39 ` Matthew Wilcox
2008-02-29 0:50 ` Harvey Harrison
2008-02-29 1:43 ` Andrew Morton
@ 2008-02-29 2:00 ` Stephen Rothwell
2008-02-29 2:10 ` Andrew Morton
2008-02-29 16:14 ` Linus Torvalds
2 siblings, 2 replies; 30+ messages in thread
From: Stephen Rothwell @ 2008-02-29 2:00 UTC (permalink / raw)
To: Matthew Wilcox
Cc: Ingo Molnar, linux-kernel, Matthew Wilcox, Thomas Gleixner,
Andrew Morton, linux-next, Linus
[-- Attachment #1: Type: text/plain, Size: 604 bytes --]
On Thu, 28 Feb 2008 17:39:54 -0700 Matthew Wilcox <matthew@wil.cx> wrote:
>
> Stephen, I've put the semaphore patches into a git tree; can you add it
> to linux-next?
>
> http://git.kernel.org/?p=linux/kernel/git/willy/misc.git;a=shortlog;h=semaphore
I have put this in for toady's build (but using the git URL). This tree
is in the "too many conflicts and its out until fixed" category ...
However, it is also a candidate for Linus' "next" branch (if he is going
to run one ...).
--
Cheers,
Stephen Rothwell sfr@canb.auug.org.au
http://www.canb.auug.org.au/~sfr/
[-- Attachment #2: Type: application/pgp-signature, Size: 189 bytes --]
^ permalink raw reply [flat|nested] 30+ messages in thread
* Re: [PATCH 11/12] Generic semaphore implementation
2008-02-29 2:00 ` Stephen Rothwell
@ 2008-02-29 2:10 ` Andrew Morton
2008-02-29 5:32 ` Matthew Wilcox
2008-02-29 6:43 ` Stephen Rothwell
2008-02-29 16:14 ` Linus Torvalds
1 sibling, 2 replies; 30+ messages in thread
From: Andrew Morton @ 2008-02-29 2:10 UTC (permalink / raw)
To: Stephen Rothwell
Cc: Matthew Wilcox, Ingo Molnar, linux-kernel, Matthew Wilcox,
Thomas Gleixner, linux-next, Linus, linux-arch
On Fri, 29 Feb 2008 13:00:19 +1100 Stephen Rothwell <sfr@canb.auug.org.au> wrote:
> On Thu, 28 Feb 2008 17:39:54 -0700 Matthew Wilcox <matthew@wil.cx> wrote:
> >
> > Stephen, I've put the semaphore patches into a git tree; can you add it
> > to linux-next?
> >
> > http://git.kernel.org/?p=linux/kernel/git/willy/misc.git;a=shortlog;h=semaphore
>
> I have put this in for toady's build (but using the git URL). This tree
> is in the "too many conflicts and its out until fixed" category ...
A shame.
Most of the conflicts will be due to all the
-#include <asm/semaphore.h>
+#include <linux/semaphore.h>
but they're all optional anyway, because include/asm-*/semaphore.h is
#include <linux/semaphore.h>
so either a) you just ignore all those conflicts or b) we ask Willy to
remove all that stuff and we can trickle it in via subsystems later.
^ permalink raw reply [flat|nested] 30+ messages in thread
* Re: [PATCH 11/12] Generic semaphore implementation
2008-02-28 6:34 ` [PATCH 11/12] Generic semaphore implementation Matthew Wilcox
` (2 preceding siblings ...)
2008-02-29 1:57 ` Andrew Morton
@ 2008-02-29 2:37 ` Harvey Harrison
2008-02-29 2:47 ` [PATCH] semaphore: remove likely/unlikely annotations Harvey Harrison
2008-03-03 14:54 ` [PATCH 11/12] Generic semaphore implementation Matthew Wilcox
3 siblings, 2 replies; 30+ messages in thread
From: Harvey Harrison @ 2008-02-29 2:37 UTC (permalink / raw)
To: Matthew Wilcox; +Cc: linux-kernel, Matthew Wilcox
> +/*
> + * Because this function is inlined, the 'state' parameter will be constant,
> + * and thus optimised away by the compiler.
> + */
If so, is unlikely() still needed?
> +static inline int __sched __down_common(struct semaphore *sem, long state)
> +{
> + int result = 0;
> + struct task_struct *task = current;
> + struct semaphore_waiter waiter;
> +
> + list_add_tail(&waiter.list, &sem->wait_list);
> + waiter.task = task;
> + waiter.up = 0;
> +
> + for (;;) {
> + if (unlikely((state == TASK_INTERRUPTIBLE &&
> + signal_pending(task)) ||
> + (state == TASK_KILLABLE &&
> + fatal_signal_pending(task))))
> + goto interrupted;
if (state == TASK_INTERRUPTIBLE && signal_pending(task))
goto interrupted;
if (state == TASK_KILLABLE && fatal_signal_pending(task))
goto interrupted;
Other than that small bit, looks great, any thoughts to getting rid of
all the likely/unlikely as well? If they're no longer performance
critical, it would be nice to have it that little bit cleaner.
Harvey
^ permalink raw reply [flat|nested] 30+ messages in thread
* [PATCH] semaphore: remove likely/unlikely annotations
2008-02-29 2:37 ` Harvey Harrison
@ 2008-02-29 2:47 ` Harvey Harrison
2008-03-03 14:54 ` [PATCH 11/12] Generic semaphore implementation Matthew Wilcox
1 sibling, 0 replies; 30+ messages in thread
From: Harvey Harrison @ 2008-02-29 2:47 UTC (permalink / raw)
To: Matthew Wilcox; +Cc: linux-kernel, Matthew Wilcox, Andrew Morton
Also some small codingstyle changes, empty line after declarations,
separate an if statement.
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
---
I know it's a small thing, feel free to take it or not.
kernel/semaphore.c | 28 +++++++++++++++-------------
1 files changed, 15 insertions(+), 13 deletions(-)
diff --git a/kernel/semaphore.c b/kernel/semaphore.c
index 32934f2..f4aeeda 100644
--- a/kernel/semaphore.c
+++ b/kernel/semaphore.c
@@ -41,7 +41,7 @@ void down(struct semaphore *sem)
{
might_sleep();
spin_lock_irq(&sem->lock);
- if (unlikely(sem->count-- <= 0))
+ if (sem->count-- <= 0)
__down(sem);
spin_unlock_irq(&sem->lock);
}
@@ -50,9 +50,10 @@ EXPORT_SYMBOL(down);
int down_interruptible(struct semaphore *sem)
{
int result = 0;
+
might_sleep();
spin_lock_irq(&sem->lock);
- if (unlikely(sem->count-- <= 0))
+ if (sem->count-- <= 0)
result = __down_interruptible(sem);
spin_unlock_irq(&sem->lock);
return result;
@@ -62,9 +63,10 @@ EXPORT_SYMBOL(down_interruptible);
int down_killable(struct semaphore *sem)
{
int result = 0;
+
might_sleep();
spin_lock_irq(&sem->lock);
- if (unlikely(sem->count-- <= 0))
+ if (sem->count-- <= 0)
result = __down_killable(sem);
spin_unlock_irq(&sem->lock);
return result;
@@ -91,7 +93,7 @@ int down_trylock(struct semaphore *sem)
spin_lock_irqsave(&sem->lock, flags);
count = sem->count - 1;
- if (likely(count >= 0))
+ if (count >= 0)
sem->count = count;
spin_unlock_irqrestore(&sem->lock, flags);
return (count < 0);
@@ -103,7 +105,7 @@ void up(struct semaphore *sem)
unsigned long flags;
spin_lock_irqsave(&sem->lock, flags);
- if (likely(sem->count >= 0))
+ if (sem->count >= 0)
sem->count++;
else
__up(sem);
@@ -128,8 +130,9 @@ struct semaphore_waiter {
*/
static void noinline __sched __up_down_common(struct semaphore *sem)
{
- struct semaphore_waiter *waiter = list_first_entry(&sem->wait_list,
- struct semaphore_waiter, list);
+ struct semaphore_waiter *waiter;
+
+ waiter = list_first_entry(&sem->wait_list, struct semaphore_waiter, list);
list_del(&waiter->list);
waiter->up = 1;
wake_up_process(waiter->task);
@@ -150,10 +153,9 @@ static inline int __sched __down_common(struct semaphore *sem, long state)
waiter.up = 0;
for (;;) {
- if (unlikely((state == TASK_INTERRUPTIBLE &&
- signal_pending(task)) ||
- (state == TASK_KILLABLE &&
- fatal_signal_pending(task))))
+ if (state == TASK_INTERRUPTIBLE && signal_pending(task))
+ goto interrupted;
+ if (state == TASK_KILLABLE && fatal_signal_pending(task))
goto interrupted;
__set_task_state(task, state);
spin_unlock_irq(&sem->lock);
@@ -175,7 +177,7 @@ static inline int __sched __down_common(struct semaphore *sem, long state)
* but it doesn't hurt, that's not a commonly exercised path and
* it's not a performance path either.
*/
- if (unlikely((++sem->count >= 0) && !list_empty(&sem->wait_list)))
+ if (++sem->count >= 0 && !list_empty(&sem->wait_list))
__up_down_common(sem);
return result;
}
@@ -197,7 +199,7 @@ static int noinline __sched __down_killable(struct semaphore *sem)
static void noinline __sched __up(struct semaphore *sem)
{
- if (unlikely(list_empty(&sem->wait_list)))
+ if (list_empty(&sem->wait_list))
sem->count++;
else
__up_down_common(sem);
--
1.5.4.3.342.g99e8
^ permalink raw reply related [flat|nested] 30+ messages in thread
* Re: [PATCH 11/12] Generic semaphore implementation
2008-02-29 1:43 ` Andrew Morton
@ 2008-02-29 5:30 ` Matthew Wilcox
2008-02-29 17:42 ` Haavard Skinnemoen
2008-02-29 19:21 ` Ingo Molnar
2 siblings, 0 replies; 30+ messages in thread
From: Matthew Wilcox @ 2008-02-29 5:30 UTC (permalink / raw)
To: Andrew Morton
Cc: Ingo Molnar, Stephen Rothwell, linux-kernel, Matthew Wilcox,
Thomas Gleixner, linux-arch
On Thu, Feb 28, 2008 at 05:43:49PM -0800, Andrew Morton wrote:
> err, we'd better tell the arch maintainers than we just deleted all their
> sempahore code.
^^ I'm so glad it's not just me who makes that typo. I actually
grepped for it before sending the patches out.
I did already send it to linux-arch back in January or so. But a
reminder won't hurt.
> yummy summary:
>
> 254 files changed, 386 insertions(+), 7827 deletions(-)
Yeah, that's quite attractive ;-)
> Yes, let's get this into linux-next if poss please. If mainline later
> breaks for some architecture, well, we did our best..
It _should_ only be build breakage. I guess we'll see.
--
Intel are signing my paycheques ... these opinions are still mine
"Bill, look, we understand that you're interested in selling us this
operating system, but compare it to ours. We can't possibly take such
a retrograde step."
^ permalink raw reply [flat|nested] 30+ messages in thread
* Re: [PATCH 11/12] Generic semaphore implementation
2008-02-29 2:10 ` Andrew Morton
@ 2008-02-29 5:32 ` Matthew Wilcox
2008-02-29 6:43 ` Stephen Rothwell
1 sibling, 0 replies; 30+ messages in thread
From: Matthew Wilcox @ 2008-02-29 5:32 UTC (permalink / raw)
To: Andrew Morton
Cc: Stephen Rothwell, Ingo Molnar, linux-kernel, Matthew Wilcox,
Thomas Gleixner, linux-next, Linus, linux-arch
On Thu, Feb 28, 2008 at 06:10:54PM -0800, Andrew Morton wrote:
> Most of the conflicts will be due to all the
>
> -#include <asm/semaphore.h>
> +#include <linux/semaphore.h>
>
> but they're all optional anyway, because include/asm-*/semaphore.h is
>
> #include <linux/semaphore.h>
>
> so either a) you just ignore all those conflicts or b) we ask Willy to
> remove all that stuff and we can trickle it in via subsystems later.
Yeah, we can trickle that in later. Fine by me.
I think rather more conflict is likely with the 105 files where I just
removed the asm/semaphore.h include. I'd like it if we could get Linus
to merge those at this stage. Since it passes an x86 allmodconfig
build, I'd like to think the breakage would be minimal.
--
Intel are signing my paycheques ... these opinions are still mine
"Bill, look, we understand that you're interested in selling us this
operating system, but compare it to ours. We can't possibly take such
a retrograde step."
^ permalink raw reply [flat|nested] 30+ messages in thread
* Re: [PATCH 11/12] Generic semaphore implementation
2008-02-29 1:57 ` Andrew Morton
@ 2008-02-29 5:43 ` Matthew Wilcox
0 siblings, 0 replies; 30+ messages in thread
From: Matthew Wilcox @ 2008-02-29 5:43 UTC (permalink / raw)
To: Andrew Morton; +Cc: linux-kernel, Matthew Wilcox, linux-arch
On Thu, Feb 28, 2008 at 05:57:29PM -0800, Andrew Morton wrote:
> This make all architectures use the lib/semaphore-sleepers.c
> implementation.
It's slightly different -- I didn't use any existing semaphore
implementation for inspiration (though I did write the parisc one,
so I couldn't help but be influenced). I was much more influenced
by mutex.c. After I'd posted it the first time, dhowells pointed out
it was essentially the same as FRV's implementation.
> The major difference is that down() and up() will now
> unconditionally do a spin_lock_irq[save]() on the not-contended fastpath,
> whereas the hand-optimised arch-specific implementations would avoid that.
>
> Yes, hopefully not many sempahores are used on fastpaths any more, and a
> suitable fix for any which _are_ so used is usually convert-to-mutex.
>
> And spin_lock_irqsave() probably isn't hugely slower than an atomic-dec
> anyway.
As always, the major cost is getting the cacheline exclusive on this
CPU. I'd be surprised if you can measure the difference.
> A few nits, most or all of which pertain to the old code:
Thanks for the review.
> > +static void noinline __down(struct semaphore *sem);
> > +static int noinline __down_interruptible(struct semaphore *sem);
> > +static int noinline __down_killable(struct semaphore *sem);
> > +static void noinline __up(struct semaphore *sem);
>
> We conventionally do `static inline void' rather than `static void inline',
> so I guess we should do `static noinline void' too.
I can change that. I'll modify the git tree, unless anyone has any
complaints. We should fix mutex.c at the same time:
static void noinline __sched
__mutex_lock_slowpath(atomic_t *lock_count);
> > +int down_interruptible(struct semaphore *sem)
> > +{
> > + int result = 0;
> > + might_sleep();
> > + spin_lock_irq(&sem->lock);
> > + if (unlikely(sem->count-- <= 0))
> > + result = __down_interruptible(sem);
> > + spin_unlock_irq(&sem->lock);
> > + return result;
> > +}
> > +EXPORT_SYMBOL(down_interruptible);
>
> Some functions leave no blank line between end-of-locals and start-of-code...
It's not something I feel strongly about ;-)
> whereas some others do leave a blank line.
>
> I think the 51% consensus is that the latter form is preferred.
Fine.
> > +static void noinline __sched __up_down_common(struct semaphore *sem)
> > +{
> > + struct semaphore_waiter *waiter = list_first_entry(&sem->wait_list,
> > + struct semaphore_waiter, list);
> > + list_del(&waiter->list);
> > + waiter->up = 1;
>
> hm. Do we need a barrier here?
__up_down_common is always called while holding the spinlock. The
spinlock is acquired by the waiter before it checks the flag. If
there's a race here, I question the value of spinlocks at all.
> > + wake_up_process(waiter->task);
> > + * Because this function is inlined, the 'state' parameter will be constant,
> > + * and thus optimised away by the compiler.
> > + */
> That is one huuuuuuuge inline. Are we sure it's justified?
It's a mirror of __mutex_lock_common ... I don't believe it's justified
in one case and not the other.
--
Intel are signing my paycheques ... these opinions are still mine
"Bill, look, we understand that you're interested in selling us this
operating system, but compare it to ours. We can't possibly take such
a retrograde step."
^ permalink raw reply [flat|nested] 30+ messages in thread
* Re: [PATCH 11/12] Generic semaphore implementation
2008-02-29 2:10 ` Andrew Morton
2008-02-29 5:32 ` Matthew Wilcox
@ 2008-02-29 6:43 ` Stephen Rothwell
1 sibling, 0 replies; 30+ messages in thread
From: Stephen Rothwell @ 2008-02-29 6:43 UTC (permalink / raw)
To: Andrew Morton
Cc: Matthew Wilcox, Ingo Molnar, linux-kernel, Matthew Wilcox,
Thomas Gleixner, linux-next, Linus, linux-arch
[-- Attachment #1: Type: text/plain, Size: 1102 bytes --]
On Thu, 28 Feb 2008 18:10:54 -0800 Andrew Morton <akpm@linux-foundation.org> wrote:
>
> > I have put this in for toady's build (but using the git URL). This tree
> > is in the "too many conflicts and its out until fixed" category ...
>
> A shame.
>
> Most of the conflicts will be due to all the
>
> -#include <asm/semaphore.h>
> +#include <linux/semaphore.h>
>
> but they're all optional anyway, because include/asm-*/semaphore.h is
>
> #include <linux/semaphore.h>
>
> so either a) you just ignore all those conflicts or b) we ask Willy to
> remove all that stuff and we can trickle it in via subsystems later.
My conflict tolerance is already rising. i.e. I will fix up such trivial
to fix conflicts. I am more concerned with complexity of conflicts than
mere number (so "too many conflicts" should be read as "too many
conflicts that I can't figure out in a shortish period of time").
If it gets too bad, it falls into Linus' "the person who changes the APIs
bears the pain" basket. :-)
--
Cheers,
Stephen Rothwell sfr@canb.auug.org.au
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^ permalink raw reply [flat|nested] 30+ messages in thread
* Re: [PATCH 11/12] Generic semaphore implementation
2008-02-29 2:00 ` Stephen Rothwell
2008-02-29 2:10 ` Andrew Morton
@ 2008-02-29 16:14 ` Linus Torvalds
1 sibling, 0 replies; 30+ messages in thread
From: Linus Torvalds @ 2008-02-29 16:14 UTC (permalink / raw)
To: Stephen Rothwell
Cc: Matthew Wilcox, Ingo Molnar, linux-kernel, Matthew Wilcox,
Thomas Gleixner, Andrew Morton, linux-next
On Fri, 29 Feb 2008, Stephen Rothwell wrote:
>
> On Thu, 28 Feb 2008 17:39:54 -0700 Matthew Wilcox <matthew@wil.cx> wrote:
> >
> > Stephen, I've put the semaphore patches into a git tree; can you add it
> > to linux-next?
> >
> > http://git.kernel.org/?p=linux/kernel/git/willy/misc.git;a=shortlog;h=semaphore
>
> I have put this in for toady's build (but using the git URL). This tree
> is in the "too many conflicts and its out until fixed" category ...
> However, it is also a candidate for Linus' "next" branch (if he is going
> to run one ...).
I'm not going to do a "next" branch just for stupid syntactic merge errors
that are trivially fixed due to some include-file moving. If
submaintainers can fix it up trivially, it's really not worth it.
Linus
^ permalink raw reply [flat|nested] 30+ messages in thread
* Re: [PATCH 11/12] Generic semaphore implementation
2008-02-29 1:43 ` Andrew Morton
2008-02-29 5:30 ` Matthew Wilcox
@ 2008-02-29 17:42 ` Haavard Skinnemoen
2008-02-29 19:21 ` Ingo Molnar
2 siblings, 0 replies; 30+ messages in thread
From: Haavard Skinnemoen @ 2008-02-29 17:42 UTC (permalink / raw)
To: Andrew Morton
Cc: Matthew Wilcox, Ingo Molnar, Stephen Rothwell, linux-kernel,
Matthew Wilcox, Thomas Gleixner, linux-arch
On Thu, 28 Feb 2008 17:43:49 -0800
Andrew Morton <akpm@linux-foundation.org> wrote:
> The only major conflict is with avr32 which seems to have just done a major
> revamp of that architecture's semaphore implementation. Oh well.
Not anymore. It was a pure spaces-to-tabs conversion, so I dropped it.
Haavard
^ permalink raw reply [flat|nested] 30+ messages in thread
* Re: [PATCH 11/12] Generic semaphore implementation
2008-02-29 1:43 ` Andrew Morton
2008-02-29 5:30 ` Matthew Wilcox
2008-02-29 17:42 ` Haavard Skinnemoen
@ 2008-02-29 19:21 ` Ingo Molnar
2 siblings, 0 replies; 30+ messages in thread
From: Ingo Molnar @ 2008-02-29 19:21 UTC (permalink / raw)
To: Andrew Morton
Cc: Matthew Wilcox, Stephen Rothwell, linux-kernel, Matthew Wilcox,
Thomas Gleixner, linux-arch
* Andrew Morton <akpm@linux-foundation.org> wrote:
> yummy summary:
>
> 254 files changed, 386 insertions(+), 7827 deletions(-)
>
> The only major conflict is with avr32 which seems to have just done a
> major revamp of that architecture's semaphore implementation. Oh
> well.
>
> There are a couple of small #include rejects here and there, nothing
> at all major.
>
> Yes, let's get this into linux-next if poss please. If mainline later
> breaks for some architecture, well, we did our best..
a better approach would be to send the core bits to Linus right now - as
long as it's Kconfig isolated and inactive code - hence it is eligible
as a cleanup.
That means arch maintainers could start applying the patches at their
own pace, starting right now, in their own work-flow and test-flow.
(obviously, the first such patches would hit mainline starting in the
next merge window)
And all the linux-next integration trouble down the line is avoided, and
each architecture can do a concentrated effort of: 'get rid of semaphore
code'.
Please!
Ingo
^ permalink raw reply [flat|nested] 30+ messages in thread
* Re: [PATCH 11/12] Generic semaphore implementation
2008-02-29 2:37 ` Harvey Harrison
2008-02-29 2:47 ` [PATCH] semaphore: remove likely/unlikely annotations Harvey Harrison
@ 2008-03-03 14:54 ` Matthew Wilcox
1 sibling, 0 replies; 30+ messages in thread
From: Matthew Wilcox @ 2008-03-03 14:54 UTC (permalink / raw)
To: Harvey Harrison; +Cc: linux-kernel, Matthew Wilcox
On Thu, Feb 28, 2008 at 06:37:59PM -0800, Harvey Harrison wrote:
> > +/*
> > + * Because this function is inlined, the 'state' parameter will be constant,
> > + * and thus optimised away by the compiler.
> > + */
>
> If so, is unlikely() still needed?
It's needed for the case where the function is inlined into
__down_interruptible / __down_killable.
> Other than that small bit, looks great, any thoughts to getting rid of
> all the likely/unlikely as well? If they're no longer performance
> critical, it would be nice to have it that little bit cleaner.
I'd rather keep it as close to mutex.c as possible.
--
Intel are signing my paycheques ... these opinions are still mine
"Bill, look, we understand that you're interested in selling us this
operating system, but compare it to ours. We can't possibly take such
a retrograde step."
^ permalink raw reply [flat|nested] 30+ messages in thread
end of thread, other threads:[~2008-03-03 14:54 UTC | newest]
Thread overview: 30+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2008-02-27 0:36 [PATCHES] semaphore rewrite Matthew Wilcox
2008-02-28 6:33 ` [PATCH 01/12] Fix quota.h includes Matthew Wilcox
2008-02-28 6:33 ` [PATCH 02/12] Add semaphore.h to kernel_lock.c Matthew Wilcox
2008-02-28 6:33 ` [PATCH 03/12] arch: Remove unnecessary inclusions of asm/semaphore.h Matthew Wilcox
2008-02-28 6:33 ` [PATCH 04/12] net: " Matthew Wilcox
2008-02-28 6:33 ` [PATCH 05/12] drivers: " Matthew Wilcox
2008-02-28 6:33 ` [PATCH 06/12] fs: " Matthew Wilcox
2008-02-28 6:33 ` [PATCH 07/12] include: " Matthew Wilcox
2008-02-28 6:33 ` [PATCH 08/12] kernel: " Matthew Wilcox
2008-02-28 6:33 ` [PATCH 09/12] lib: " Matthew Wilcox
2008-02-28 6:33 ` [PATCH 10/12] security: " Matthew Wilcox
2008-02-28 6:34 ` [PATCH 11/12] Generic semaphore implementation Matthew Wilcox
2008-02-28 6:34 ` [PATCH 12/12] Convert asm/semaphore.h users to linux/semaphore.h Matthew Wilcox
2008-02-28 7:18 ` [PATCH 11/12] Generic semaphore implementation Ingo Molnar
2008-02-29 0:39 ` Matthew Wilcox
2008-02-29 0:50 ` Harvey Harrison
2008-02-29 1:43 ` Andrew Morton
2008-02-29 5:30 ` Matthew Wilcox
2008-02-29 17:42 ` Haavard Skinnemoen
2008-02-29 19:21 ` Ingo Molnar
2008-02-29 2:00 ` Stephen Rothwell
2008-02-29 2:10 ` Andrew Morton
2008-02-29 5:32 ` Matthew Wilcox
2008-02-29 6:43 ` Stephen Rothwell
2008-02-29 16:14 ` Linus Torvalds
2008-02-29 1:57 ` Andrew Morton
2008-02-29 5:43 ` Matthew Wilcox
2008-02-29 2:37 ` Harvey Harrison
2008-02-29 2:47 ` [PATCH] semaphore: remove likely/unlikely annotations Harvey Harrison
2008-03-03 14:54 ` [PATCH 11/12] Generic semaphore implementation Matthew Wilcox
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