ia64/linux-2.6.18-xen.hg

view include/asm-generic/percpu.h @ 782:9ab1c319531f

merge with linux-2.6.18-xen.hg
author Isaku Yamahata <yamahata@valinux.co.jp>
date Wed Jan 28 13:07:23 2009 +0900 (2009-01-28)
parents 831230e53067
children
line source
1 #ifndef _ASM_GENERIC_PERCPU_H_
2 #define _ASM_GENERIC_PERCPU_H_
3 #include <linux/compiler.h>
5 #define __GENERIC_PER_CPU
6 #ifdef CONFIG_SMP
8 extern unsigned long __per_cpu_offset[NR_CPUS];
10 #define per_cpu_offset(x) (__per_cpu_offset[x])
12 /* Separate out the type, so (int[3], foo) works. */
13 #define DEFINE_PER_CPU(type, name) \
14 __attribute__((__section__(".data.percpu"))) __typeof__(type) per_cpu__##name
16 /* var is in discarded region: offset to particular copy we want */
17 #define per_cpu(var, cpu) (*RELOC_HIDE(&per_cpu__##var, __per_cpu_offset[cpu]))
18 #define __get_cpu_var(var) per_cpu(var, smp_processor_id())
19 #define __raw_get_cpu_var(var) per_cpu(var, raw_smp_processor_id())
21 /* A macro to avoid #include hell... */
22 #define percpu_modcopy(pcpudst, src, size) \
23 do { \
24 unsigned int __i; \
25 for_each_possible_cpu(__i) \
26 memcpy((pcpudst)+__per_cpu_offset[__i], \
27 (src), (size)); \
28 } while (0)
29 #else /* ! SMP */
31 #define DEFINE_PER_CPU(type, name) \
32 __typeof__(type) per_cpu__##name
34 #define per_cpu(var, cpu) (*((void)(cpu), &per_cpu__##var))
35 #define __get_cpu_var(var) per_cpu__##var
36 #define __raw_get_cpu_var(var) per_cpu__##var
38 #endif /* SMP */
40 #define DECLARE_PER_CPU(type, name) extern __typeof__(type) per_cpu__##name
42 #define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(per_cpu__##var)
43 #define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(per_cpu__##var)
45 #endif /* _ASM_GENERIC_PERCPU_H_ */