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percpu: make PER_CPU_BASE_SECTION overridable by arches

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Impact: bug fix

IA-64 needs to put percpu data in the seperate section even on UP.
Fixes regression caused by "percpu: refactor percpu.h"

Signed-off-by: Brian Gerst <brgerst@gmail.com>
Acked-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Brian Gerst 2009-02-08 09:58:38 -05:00 • committed by Ingo Molnar
commit d3770449d3
2 changed files with 9 additions and 3 deletions
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4
arch/ia64/include/asm/percpu.h
View file

@ -27,12 +27,12 @@ extern void *per_cpu_init(void);
#else /* ! SMP */ #else /* ! SMP */
#define PER_CPU_ATTRIBUTES __attribute__((__section__(".data.percpu")))
#define per_cpu_init() (__phys_per_cpu_start) #define per_cpu_init() (__phys_per_cpu_start)
#endif /* SMP */ #endif /* SMP */
#define PER_CPU_BASE_SECTION ".data.percpu"
/* /*
* Be extremely careful when taking the address of this variable! Due to virtual * Be extremely careful when taking the address of this variable! Due to virtual
* remapping, it is different from the canonical address returned by __get_cpu_var(var)! * remapping, it is different from the canonical address returned by __get_cpu_var(var)!

8
include/linux/percpu.h
View file

@ -8,8 +8,15 @@
#include <asm/percpu.h> #include <asm/percpu.h>
#ifndef PER_CPU_BASE_SECTION
#ifdef CONFIG_SMP #ifdef CONFIG_SMP
#define PER_CPU_BASE_SECTION ".data.percpu" #define PER_CPU_BASE_SECTION ".data.percpu"
#else
#define PER_CPU_BASE_SECTION ".data"
#endif
#endif
#ifdef CONFIG_SMP
#ifdef MODULE #ifdef MODULE
#define PER_CPU_SHARED_ALIGNED_SECTION "" #define PER_CPU_SHARED_ALIGNED_SECTION ""
@ -20,7 +27,6 @@
#else #else
#define PER_CPU_BASE_SECTION ".data"
#define PER_CPU_SHARED_ALIGNED_SECTION "" #define PER_CPU_SHARED_ALIGNED_SECTION ""
#define PER_CPU_FIRST_SECTION "" #define PER_CPU_FIRST_SECTION ""