[deliverable/linux.git] / include / asm-generic / percpu.h

#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())
#define __raw_get_cpu_var(var) per_cpu(var, raw_smp_processor_id())

/* A macro to avoid #include hell... */
#define percpu_modcopy(pcpudst, src, size)			\
do {								\
	unsigned int __i;					\
	for_each_possible_cpu(__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
#define __raw_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_ */
Commit	Line	Data
1da177e4 LT	1	#ifndef _ASM_GENERIC_PERCPU_H_
	2	#define _ASM_GENERIC_PERCPU_H_
	3	#include <linux/compiler.h>
	4
	5	#define __GENERIC_PER_CPU
	6	#ifdef CONFIG_SMP
	7
	8	extern unsigned long __per_cpu_offset[NR_CPUS];
	9
	10	/* Separate out the type, so (int[3], foo) works. */
	11	#define DEFINE_PER_CPU(type, name) \
	12	__attribute__((__section__(".data.percpu"))) __typeof__(type) per_cpu__##name
	13
	14	/* var is in discarded region: offset to particular copy we want */
	15	#define per_cpu(var, cpu) (*RELOC_HIDE(&per_cpu__##var, __per_cpu_offset[cpu]))
	16	#define __get_cpu_var(var) per_cpu(var, smp_processor_id())
bfe5d834	17	#define __raw_get_cpu_var(var) per_cpu(var, raw_smp_processor_id())
1da177e4 LT	18
	19	/* A macro to avoid #include hell... */
	20	#define percpu_modcopy(pcpudst, src, size) \
	21	do { \
	22	unsigned int __i; \
0a945022	23	for_each_possible_cpu(__i) \
394e3902 AM	24	memcpy((pcpudst)+__per_cpu_offset[__i], \
394e3902 AM	25	(src), (size)); \
1da177e4 LT	26	} while (0)
	27	#else /* ! SMP */
	28
	29	#define DEFINE_PER_CPU(type, name) \
	30	__typeof__(type) per_cpu__##name
	31
11c80c83	32	#define per_cpu(var, cpu) (*((void)(cpu), &per_cpu__##var))
1da177e4	33	#define __get_cpu_var(var) per_cpu__##var
bfe5d834	34	#define __raw_get_cpu_var(var) per_cpu__##var
1da177e4 LT	35
	36	#endif /* SMP */
	37
	38	#define DECLARE_PER_CPU(type, name) extern __typeof__(type) per_cpu__##name
	39
	40	#define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(per_cpu__##var)
	41	#define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(per_cpu__##var)
	42
	43	#endif /* _ASM_GENERIC_PERCPU_H_ */