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| author | travis@sgi.com <travis@sgi.com> | 2008-01-30 13:32:52 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-01-30 13:32:52 +0100 |
| commit | 5280e004fc22314122c84978c0b6a741cf96dc0f (patch) | |
| tree | 008b96d81a924be764629f62f98fa5f7c9e04773 /include/linux/percpu.h | |
| parent | b32ef636a59aad12f9f9b5dc34c93222842c58ba (diff) | |
| download | lwn-5280e004fc22314122c84978c0b6a741cf96dc0f.tar.gz lwn-5280e004fc22314122c84978c0b6a741cf96dc0f.zip | |
percpu: move arch XX_PER_CPU_XX definitions into linux/percpu.h
- Special consideration for IA64: Add the ability to specify
arch specific per cpu flags
- remove .data.percpu attribute from DEFINE_PER_CPU for non-smp case.
The arch definitions are all the same. So move them into linux/percpu.h.
We cannot move DECLARE_PER_CPU since some include files just include
asm/percpu.h to avoid include recursion problems.
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>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux/percpu.h')
| -rw-r--r-- | include/linux/percpu.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/include/linux/percpu.h b/include/linux/percpu.h index 926adaae0f96..00412bb494c4 100644 --- a/include/linux/percpu.h +++ b/include/linux/percpu.h @@ -9,6 +9,30 @@ #include <asm/percpu.h> +#ifndef PER_CPU_ATTRIBUTES +#define PER_CPU_ATTRIBUTES +#endif + +#ifdef CONFIG_SMP +#define DEFINE_PER_CPU(type, name) \ + __attribute__((__section__(".data.percpu"))) \ + PER_CPU_ATTRIBUTES __typeof__(type) per_cpu__##name + +#define DEFINE_PER_CPU_SHARED_ALIGNED(type, name) \ + __attribute__((__section__(".data.percpu.shared_aligned"))) \ + PER_CPU_ATTRIBUTES __typeof__(type) per_cpu__##name \ + ____cacheline_aligned_in_smp +#else +#define DEFINE_PER_CPU(type, name) \ + PER_CPU_ATTRIBUTES __typeof__(type) per_cpu__##name + +#define DEFINE_PER_CPU_SHARED_ALIGNED(type, name) \ + DEFINE_PER_CPU(type, name) +#endif + +#define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(per_cpu__##var) +#define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(per_cpu__##var) + /* Enough to cover all DEFINE_PER_CPUs in kernel, including modules. */ #ifndef PERCPU_ENOUGH_ROOM #ifdef CONFIG_MODULES |