fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / include / asm-x86 / percpu_64.h
blob5abd48270101e9e11f1540b3084bd69cb2e5c573
1 #ifndef _ASM_X8664_PERCPU_H_
2 #define _ASM_X8664_PERCPU_H_
3 #include <linux/compiler.h>
5 /* Same as asm-generic/percpu.h, except that we store the per cpu offset
6 in the PDA. Longer term the PDA and every per cpu variable
7 should be just put into a single section and referenced directly
8 from %gs */
10 #ifdef CONFIG_SMP
12 #include <asm/pda.h>
14 #define __per_cpu_offset(cpu) (cpu_pda(cpu)->data_offset)
15 #define __my_cpu_offset() read_pda(data_offset)
17 #define per_cpu_offset(x) (__per_cpu_offset(x))
19 /* Separate out the type, so (int[3], foo) works. */
20 #define DEFINE_PER_CPU(type, name) \
21 __attribute__((__section__(".data.percpu"))) __typeof__(type) per_cpu__##name
23 #define DEFINE_PER_CPU_SHARED_ALIGNED(type, name) \
24 __attribute__((__section__(".data.percpu.shared_aligned"))) \
25 __typeof__(type) per_cpu__##name \
26 ____cacheline_internodealigned_in_smp
28 /* var is in discarded region: offset to particular copy we want */
29 #define per_cpu(var, cpu) (*({ \
30 extern int simple_identifier_##var(void); \
31 RELOC_HIDE(&per_cpu__##var, __per_cpu_offset(cpu)); }))
32 #define __get_cpu_var(var) (*({ \
33 extern int simple_identifier_##var(void); \
34 RELOC_HIDE(&per_cpu__##var, __my_cpu_offset()); }))
35 #define __raw_get_cpu_var(var) (*({ \
36 extern int simple_identifier_##var(void); \
37 RELOC_HIDE(&per_cpu__##var, __my_cpu_offset()); }))
39 /* A macro to avoid #include hell... */
40 #define percpu_modcopy(pcpudst, src, size) \
41 do { \
42 unsigned int __i; \
43 for_each_possible_cpu(__i) \
44 memcpy((pcpudst)+__per_cpu_offset(__i), \
45 (src), (size)); \
46 } while (0)
48 extern void setup_per_cpu_areas(void);
50 #else /* ! SMP */
52 #define DEFINE_PER_CPU(type, name) \
53 __typeof__(type) per_cpu__##name
54 #define DEFINE_PER_CPU_SHARED_ALIGNED(type, name) \
55 DEFINE_PER_CPU(type, name)
57 #define per_cpu(var, cpu) (*((void)(cpu), &per_cpu__##var))
58 #define __get_cpu_var(var) per_cpu__##var
59 #define __raw_get_cpu_var(var) per_cpu__##var
61 #endif /* SMP */
63 #define DECLARE_PER_CPU(type, name) extern __typeof__(type) per_cpu__##name
65 #define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(per_cpu__##var)
66 #define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(per_cpu__##var)
68 #endif /* _ASM_X8664_PERCPU_H_ */