From: travis@sgi.com
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Christoph Lameter <clameter@sgi.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Rusty Russell <rusty@rustcorp.com.au>, Andi Kleen <ak@suse.de>
Subject: [PATCH 01/10] percpu: Use a kconfig variable to signal arch specific percpu setup
Date: Thu, 27 Dec 2007 16:16:18 -0800 [thread overview]
Message-ID: <20071228001617.770732000@sgi.com> (raw)
In-Reply-To: 20071228001617.597161000@sgi.com
[-- Attachment #1: arch_sets_up_per_cpu_areas --]
[-- Type: text/plain, Size: 3037 bytes --]
V1->V2:
- Use def_bool as suggested by Randy.
The use of the __GENERIC_PERCPU is a bit problematic since arches
may want to run their own percpu setup while using the generic
percpu definitions. Replace it through a kconfig variable.
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Mike Travis <travis@sgi.com>
---
arch/ia64/Kconfig | 3 +++
arch/powerpc/Kconfig | 3 +++
arch/sparc64/Kconfig | 3 +++
arch/x86/Kconfig | 3 +++
include/asm-generic/percpu.h | 1 -
include/asm-s390/percpu.h | 2 --
include/asm-x86/percpu_32.h | 2 --
init/main.c | 4 ++--
8 files changed, 14 insertions(+), 7 deletions(-)
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -82,6 +82,9 @@ config GENERIC_TIME_VSYSCALL
bool
default y
+config ARCH_SETS_UP_PER_CPU_AREA
+ def_bool y
+
config DMI
bool
default y
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -42,6 +42,9 @@ config GENERIC_HARDIRQS
bool
default y
+config ARCH_SETS_UP_PER_CPU_AREA
+ def_bool PPC64
+
config IRQ_PER_CPU
bool
default y
--- a/arch/sparc64/Kconfig
+++ b/arch/sparc64/Kconfig
@@ -68,6 +68,9 @@ config AUDIT_ARCH
bool
default y
+config ARCH_SETS_UP_PER_CPU_AREA
+ def_bool y
+
config ARCH_NO_VIRT_TO_BUS
def_bool y
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -106,6 +106,9 @@ config GENERIC_TIME_VSYSCALL
bool
default X86_64
+config ARCH_SETS_UP_PER_CPU_AREA
+ def_bool X86_64
+
config ARCH_SUPPORTS_OPROFILE
bool
default y
--- a/include/asm-generic/percpu.h
+++ b/include/asm-generic/percpu.h
@@ -3,7 +3,6 @@
#include <linux/compiler.h>
#include <linux/threads.h>
-#define __GENERIC_PER_CPU
#ifdef CONFIG_SMP
extern unsigned long __per_cpu_offset[NR_CPUS];
--- a/include/asm-s390/percpu.h
+++ b/include/asm-s390/percpu.h
@@ -4,8 +4,6 @@
#include <linux/compiler.h>
#include <asm/lowcore.h>
-#define __GENERIC_PER_CPU
-
/*
* s390 uses its own implementation for per cpu data, the offset of
* the cpu local data area is cached in the cpu's lowcore memory.
--- a/include/asm-x86/percpu_32.h
+++ b/include/asm-x86/percpu_32.h
@@ -41,8 +41,6 @@
* PER_CPU(cpu_gdt_descr, %ebx)
*/
#ifdef CONFIG_SMP
-/* Same as generic implementation except for optimized local access. */
-#define __GENERIC_PER_CPU
/* This is used for other cpus to find our section. */
extern unsigned long __per_cpu_offset[];
--- a/init/main.c
+++ b/init/main.c
@@ -363,7 +363,7 @@ static inline void smp_prepare_cpus(unsi
#else
-#ifdef __GENERIC_PER_CPU
+#ifndef CONFIG_ARCH_SETS_UP_PER_CPU_AREA
unsigned long __per_cpu_offset[NR_CPUS] __read_mostly;
EXPORT_SYMBOL(__per_cpu_offset);
@@ -384,7 +384,7 @@ static void __init setup_per_cpu_areas(v
ptr += size;
}
}
-#endif /* !__GENERIC_PER_CPU */
+#endif /* CONFIG_ARCH_SETS_UP_CPU_AREA */
/* Called by boot processor to activate the rest. */
static void __init smp_init(void)
--
next prev parent reply other threads:[~2007-12-28 0:16 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-12-28 0:16 [PATCH 00/10] percpu: Per cpu code simplification V2 travis
2007-12-28 0:16 ` travis [this message]
2007-12-28 0:16 ` [PATCH 02/10] percpu: Move arch XX_PER_CPU_XX definitions into linux/percpu.h travis
2007-12-28 0:16 ` [PATCH 03/10] percpu: Make the asm-generic/percpu.h more "generic" travis
2007-12-28 0:16 ` [PATCH 04/10] x86_32: Use generic percpu.h travis
2007-12-28 0:16 ` [PATCH 05/10] x86_64: Use generic percpu travis
2007-12-28 0:16 ` [PATCH 06/10] s390: " travis
2007-12-28 0:16 ` [PATCH 07/10] Powerpc: Use generic per cpu travis
2007-12-28 0:16 ` [PATCH 08/10] Sparc64: Use generic percpu travis
2007-12-28 0:18 ` David Miller
2007-12-28 0:16 ` [PATCH 09/10] ia64: " travis
2007-12-28 0:16 ` [PATCH 10/10] x86: Unify percpu.h travis
-- strict thread matches above, loose matches on Subject: below --
2008-01-08 21:10 [PATCH 00/10] percpu: Per cpu code simplification V4 travis
2008-01-08 21:10 ` [PATCH 01/10] percpu: Use a kconfig variable to signal arch specific percpu setup travis
2008-01-08 2:11 [PATCH 00/10] percpu: Per cpu code simplification V3 travis
2008-01-08 2:11 ` [PATCH 01/10] percpu: Use a kconfig variable to signal arch specific percpu setup travis
2008-01-08 19:24 ` Sam Ravnborg
2007-12-28 0:10 [PATCH 00/10] percpu: Per cpu code simplification V2 travis
2007-12-28 0:10 ` [PATCH 01/10] percpu: Use a kconfig variable to signal arch specific percpu setup travis
2007-12-28 0:15 ` David Miller
2007-11-28 21:09 [patch 00/10] Per cpu code simplification V2 Christoph Lameter
2007-11-28 21:09 ` [patch 01/10] percpu: Use a kconfig variable to signal arch specific percpu setup Christoph Lameter
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