From: travis@sgi.com
To: mingo@elte.hu, Andrew Morton <akpm@linux-foundation.org>,
Andi Kleen <ak@suse.de>, Christoph Lameter <clameter@sgi.com>
Cc: Jack Steiner <steiner@sgi.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Rusty Russell <rusty@rustcorp.com.au>,
tglx@linutronix.de, mingo@redhat.com
Subject: [PATCH 05/10] x86_64: Use generic percpu
Date: Mon, 07 Jan 2008 18:11:47 -0800 [thread overview]
Message-ID: <20080108021143.581044000@sgi.com> (raw)
In-Reply-To: 20080108021142.585467000@sgi.com
[-- Attachment #1: x86_64_use_generic_percpu --]
[-- Type: text/plain, Size: 1859 bytes --]
x86_64 provides an optimized way to determine the local per cpu area
offset through the pda and determines the base by accessing a remote
pda.
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Andi Kleen <ak@suse.de>
Cc: tglx@linutronix.de
Cc: mingo@redhat.com
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Mike Travis <travis@sgi.com>
---
include/asm-x86/percpu_64.h | 23 ++---------------------
1 file changed, 2 insertions(+), 21 deletions(-)
--- a/include/asm-x86/percpu_64.h
+++ b/include/asm-x86/percpu_64.h
@@ -12,21 +12,10 @@
#include <asm/pda.h>
#define __per_cpu_offset(cpu) (cpu_pda(cpu)->data_offset)
-#define __my_cpu_offset() read_pda(data_offset)
+#define __my_cpu_offset read_pda(data_offset)
#define per_cpu_offset(x) (__per_cpu_offset(x))
-/* var is in discarded region: offset to particular copy we want */
-#define per_cpu(var, cpu) (*({ \
- extern int simple_identifier_##var(void); \
- RELOC_HIDE(&per_cpu__##var, __per_cpu_offset(cpu)); }))
-#define __get_cpu_var(var) (*({ \
- extern int simple_identifier_##var(void); \
- RELOC_HIDE(&per_cpu__##var, __my_cpu_offset()); }))
-#define __raw_get_cpu_var(var) (*({ \
- extern int simple_identifier_##var(void); \
- RELOC_HIDE(&per_cpu__##var, __my_cpu_offset()); }))
-
/* A macro to avoid #include hell... */
#define percpu_modcopy(pcpudst, src, size) \
do { \
@@ -36,16 +25,8 @@ do { \
(src), (size)); \
} while (0)
-extern void setup_per_cpu_areas(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
-
#endif /* SMP */
-#define DECLARE_PER_CPU(type, name) extern __typeof__(type) per_cpu__##name
+#include <asm-generic/percpu.h>
#endif /* _ASM_X8664_PERCPU_H_ */
--
next prev parent reply other threads:[~2008-01-08 2:13 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
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
2008-01-08 2:11 ` [PATCH 02/10] percpu: Move arch XX_PER_CPU_XX definitions into linux/percpu.h travis
2008-01-08 2:11 ` [PATCH 03/10] percpu: Make the asm-generic/percpu.h more "generic" travis
2008-01-08 2:11 ` [PATCH 04/10] x86_32: Use generic percpu.h travis
2008-01-08 2:11 ` travis [this message]
2008-01-08 2:11 ` [PATCH 06/10] s390: Use generic percpu travis
2008-01-08 2:11 ` [PATCH 07/10] Powerpc: Use generic per cpu travis
2008-01-08 2:11 ` [PATCH 08/10] Sparc64: Use generic percpu travis
2008-01-08 2:11 ` [PATCH 09/10] ia64: " travis
2008-01-08 2:11 ` [PATCH 10/10] x86: Unify percpu.h travis
2008-01-08 9:07 ` [PATCH 00/10] percpu: Per cpu code simplification V3 Ingo Molnar
2008-01-08 16:27 ` Mike Travis
2008-01-08 19:04 ` Christoph Lameter
2008-01-08 22:16 ` Ingo Molnar
2008-01-08 23:53 ` Mike Travis
2008-01-08 19:26 ` Sam Ravnborg
2008-01-08 20:29 ` Mike 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 05/10] x86_64: Use generic percpu travis
2007-12-28 0:16 [PATCH 00/10] percpu: Per cpu code simplification V2 travis
2007-12-28 0:16 ` [PATCH 05/10] x86_64: Use generic percpu travis
2007-12-28 0:10 [PATCH 00/10] percpu: Per cpu code simplification V2 travis
2007-12-28 0:10 ` [PATCH 05/10] x86_64: Use generic percpu travis
2007-12-28 12:54 ` Andi Kleen
2007-12-28 22:05 ` Mike Travis
2007-12-29 1:55 ` Andi Kleen
2007-12-31 16:19 ` Mike Travis
2008-01-02 20:58 ` Christoph Lameter
2007-12-30 14:18 ` Ingo Molnar
2007-12-31 16:21 ` Mike Travis
2007-12-31 17:10 ` Mike Travis
2008-01-01 19:17 ` Ingo Molnar
2008-01-02 21:04 ` Christoph Lameter
2008-01-02 21:33 ` Ingo Molnar
2008-01-02 20:59 ` Christoph Lameter
2008-01-02 20:55 ` Christoph Lameter
2007-11-28 21:09 [patch 00/10] Per cpu code simplification V2 Christoph Lameter
2007-11-28 21:09 ` [patch 05/10] x86_64: Use generic percpu Christoph Lameter
2007-11-30 11:11 ` Ingo Molnar
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