From: Christoph Lameter <clameter@sgi.com>
To: akpm@linux-foundation.org
Cc: linux-kernel@vger.kernel.org, linux-ia64@vger.kernel.org,
tony.luck@intel.com
Subject: [patch 13/14] ia64: Use generic percpu
Date: Mon, 26 Nov 2007 16:14:20 -0800 [thread overview]
Message-ID: <20071127001432.160399113@sgi.com> (raw)
In-Reply-To: 20071127001407.859743255@sgi.com
[-- Attachment #1: ia64_generic_percpu --]
[-- Type: text/plain, Size: 2460 bytes --]
ia64 has a special processor specific mapping that can be used to locate the
offset for the current per cpu area.
Cc: linux-ia64@vger.kernel.org
Cc: tony.luck@intel.com
Signed-off-by: Christoph Lameter <clameter@sgi.com>
---
include/asm-ia64/percpu.h | 24 ++++++++----------------
1 file changed, 8 insertions(+), 16 deletions(-)
Index: linux-2.6/include/asm-ia64/percpu.h
===================================================================
--- linux-2.6.orig/include/asm-ia64/percpu.h 2007-11-24 10:27:31.088350556 -0800
+++ linux-2.6/include/asm-ia64/percpu.h 2007-11-24 10:31:54.053187674 -0800
@@ -9,10 +9,9 @@
#define PERCPU_ENOUGH_ROOM PERCPU_PAGE_SIZE
#ifdef __ASSEMBLY__
-# define THIS_CPU(var) (per_cpu__##var) /* use this to mark accesses to per-CPU variables... */
+# define THIS_CPU(var) (PERCPU_ADDR + per_cpu__##var) /* use this to mark accesses to per-CPU variables... */
#else /* !__ASSEMBLY__ */
-
#include <linux/threads.h>
#define DECLARE_PER_CPU(type, name) \
@@ -20,24 +19,12 @@
#ifdef CONFIG_SMP
-extern unsigned long __per_cpu_offset[NR_CPUS];
-#define per_cpu_offset(x) (__per_cpu_offset[x])
-
-/* Equal to __per_cpu_offset[smp_processor_id()], but faster to access: */
-DECLARE_PER_CPU(unsigned long, local_per_cpu_offset);
-
-#define per_cpu(var, cpu) (*RELOC_HIDE(&per_cpu__##var, __per_cpu_offset[cpu]))
-#define __get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __ia64_per_cpu_var(local_per_cpu_offset)))
-#define __raw_get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __ia64_per_cpu_var(local_per_cpu_offset)))
+#define __my_cpu_offset __ia64_per_cpu_var(local_per_cpu_offset)
-extern void setup_per_cpu_areas (void);
extern void *per_cpu_init(void);
#else /* ! SMP */
-#define per_cpu(var, cpu) (*((void)(cpu), &per_cpu__##var))
-#define __get_cpu_var(var) per_cpu__##var
-#define __raw_get_cpu_var(var) per_cpu__##var
#define per_cpu_init() (__phys_per_cpu_start)
#endif /* SMP */
@@ -48,7 +35,12 @@ extern void *per_cpu_init(void);
* On the positive side, using __ia64_per_cpu_var() instead of __get_cpu_var() is slightly
* more efficient.
*/
-#define __ia64_per_cpu_var(var) (per_cpu__##var)
+#define __ia64_per_cpu_var(var) (*SHIFT_PTR(&per_cpu__##var, PERCPU_ADDR))
+
+#include <asm-generic/percpu.h>
+
+/* Equal to __per_cpu_offset[smp_processor_id()], but faster to access: */
+DECLARE_PER_CPU(unsigned long, local_per_cpu_offset);
#endif /* !__ASSEMBLY__ */
--
next prev parent reply other threads:[~2007-11-27 0:17 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-27 0:14 [patch 00/14] Per cpu code simplification Christoph Lameter
2007-11-27 0:14 ` [patch 01/14] Modules: Handle symbols that have a zero value Christoph Lameter
2007-11-27 0:14 ` [patch 02/14] Modules: Include sections.h to avoid defining linker variables explicitly Christoph Lameter
2007-11-27 0:14 ` [patch 03/14] Modules: Fold percpu_modcopy into module.c and get rid of the macro from hell Christoph Lameter
2007-11-27 0:14 ` [patch 04/14] ia64: Remove the __SMALL_ADDR_AREA attribute for per cpu access Christoph Lameter
2007-11-27 5:20 ` David Mosberger-Tang
2007-11-27 18:15 ` Christoph Lameter
2007-11-27 21:10 ` David Mosberger-Tang
2007-11-27 21:18 ` Christoph Lameter
2007-11-27 21:27 ` David Mosberger-Tang
2007-11-27 22:02 ` Christoph Lameter
2007-11-27 9:30 ` Andreas Schwab
2007-11-27 18:17 ` Christoph Lameter
2007-11-27 21:24 ` Andreas Schwab
2007-11-27 21:38 ` Christoph Lameter
2007-11-27 22:14 ` Adrian Bunk
2007-11-27 0:14 ` [patch 05/14] percpu: Use a Kconfig variable to configure arch specific percpu setup Christoph Lameter
2007-11-27 4:30 ` Rusty Russell
2007-11-27 18:14 ` Christoph Lameter
2007-11-28 1:36 ` Rusty Russell
2007-11-28 18:51 ` Christoph Lameter
2007-11-28 23:17 ` Rusty Russell
2007-11-28 23:36 ` Christoph Lameter
2007-11-30 2:23 ` Rusty Russell
2007-11-28 23:45 ` Jeremy Fitzhardinge
2007-11-29 0:11 ` Christoph Lameter
2007-11-29 1:18 ` Andi Kleen
2007-11-29 1:27 ` Christoph Lameter
2007-11-29 1:30 ` Jeremy Fitzhardinge
2007-11-29 1:32 ` Andi Kleen
2007-11-29 1:35 ` Christoph Lameter
2007-11-29 1:42 ` Jeremy Fitzhardinge
2007-11-29 1:48 ` Christoph Lameter
2007-11-29 1:54 ` Jeremy Fitzhardinge
2007-11-29 2:06 ` Christoph Lameter
2007-11-29 5:29 ` Jeremy Fitzhardinge
2007-11-29 6:08 ` Christoph Lameter
2007-11-29 6:10 ` Christoph Lameter
2007-11-27 23:40 ` Randy Dunlap
2007-11-28 0:03 ` Christoph Lameter
2007-11-28 0:05 ` Randy Dunlap
2007-11-27 0:14 ` [patch 06/14] percpu: Move arch XX_PER_CPU_XX definitions into linux/percpu.h Christoph Lameter
2007-11-27 0:14 ` [patch 07/14] percpu: Make the asm-generic/percpu.h more generic Christoph Lameter
2007-11-27 0:14 ` [patch 08/14] x86_32: Use generic percpu.h Christoph Lameter
2007-11-27 0:14 ` [patch 09/14] x86_64: Use generic percpu Christoph Lameter
2007-11-27 0:14 ` [patch 10/14] s390: " Christoph Lameter
2007-11-27 0:14 ` [patch 11/14] Powerpc: Use generic per cpu Christoph Lameter
2007-11-27 7:41 ` Kumar Gala
2007-11-27 18:16 ` Christoph Lameter
2007-11-27 20:58 ` Paul Mackerras
2007-11-27 21:13 ` Christoph Lameter
2007-11-28 2:35 ` Paul Mackerras
2007-11-28 18:54 ` Christoph Lameter
2007-12-02 20:55 ` Benjamin Herrenschmidt
2007-11-27 0:14 ` [patch 12/14] Sparc64: Use generic percpu Christoph Lameter
2007-11-27 0:14 ` Christoph Lameter [this message]
2007-11-27 1:37 ` [patch 13/14] ia64: " Christoph Lameter
2007-11-27 0:14 ` [patch 14/14] x86: Unify percpu.h Christoph Lameter
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