From mboxrd@z Thu Jan 1 00:00:00 1970 Message-Id: <20071228001618.285109000@sgi.com> References: <20071228001617.597161000@sgi.com> Date: Thu, 27 Dec 2007 16:16:22 -0800 From: travis@sgi.com Subject: [PATCH 05/10] x86_64: Use generic percpu Content-Disposition: inline; filename=x86_64_use_generic_percpu Sender: owner-linux-mm@kvack.org Return-Path: To: Andrew Morton Cc: Christoph Lameter , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Rusty Russell , Andi Kleen , tglx@linutronix.de, mingo@redhat.com List-ID: 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 Cc: Andi Kleen Cc: tglx@linutronix.de Cc: mingo@redhat.com Signed-off-by: Christoph Lameter Signed-off-by: Mike Travis --- include/asm-x86/percpu_64.h | 28 +++------------------------- 1 file changed, 3 insertions(+), 25 deletions(-) --- a/include/asm-x86/percpu_64.h +++ b/include/asm-x86/percpu_64.h @@ -8,35 +8,13 @@ from %gs */ #ifdef CONFIG_SMP - #include #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()); })) - -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 - +#endif +#include #endif /* _ASM_X8664_PERCPU_H_ */ -- -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org