percpu.h
上传用户:szlgq88
上传日期:2009-04-28
资源大小:48287k
文件大小:1k
- #ifndef _ASM_GENERIC_PERCPU_H_
- #define _ASM_GENERIC_PERCPU_H_
- #include <linux/compiler.h>
- #define __GENERIC_PER_CPU
- #ifdef CONFIG_SMP
- extern unsigned long __per_cpu_offset[NR_CPUS];
- /* Separate out the type, so (int[3], foo) works. */
- #define DEFINE_PER_CPU(type, name)
- __attribute__((__section__(".data.percpu"))) __typeof__(type) per_cpu__##name
- /* var is in discarded region: offset to particular copy we want */
- #define per_cpu(var, cpu) (*RELOC_HIDE(&per_cpu__##var, __per_cpu_offset[cpu]))
- #define __get_cpu_var(var) per_cpu(var, smp_processor_id())
- /* A macro to avoid #include hell... */
- #define percpu_modcopy(pcpudst, src, size)
- do {
- unsigned int __i;
- for (__i = 0; __i < NR_CPUS; __i++)
- if (cpu_possible(__i))
- memcpy((pcpudst)+__per_cpu_offset[__i],
- (src), (size));
- } while (0)
- #else /* ! SMP */
- #define DEFINE_PER_CPU(type, name)
- __typeof__(type) per_cpu__##name
- #define per_cpu(var, cpu) (*((void)(cpu), &per_cpu__##var))
- #define __get_cpu_var(var) per_cpu__##var
- #endif /* SMP */
- #define DECLARE_PER_CPU(type, name) extern __typeof__(type) per_cpu__##name
- #define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(per_cpu__##var)
- #define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(per_cpu__##var)
- #endif /* _ASM_GENERIC_PERCPU_H_ */