x86: sanitize pathes arch/x86/kernel/cpu/Makefile
[linux-3.10.git] / include / asm-x86_64 / percpu.h
1 #ifndef _ASM_X8664_PERCPU_H_
2 #define _ASM_X8664_PERCPU_H_
3 #include <linux/compiler.h>
4
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 */
9
10 #ifdef CONFIG_SMP
11
12 #include <asm/pda.h>
13
14 #define __per_cpu_offset(cpu) (cpu_pda(cpu)->data_offset)
15 #define __my_cpu_offset() read_pda(data_offset)
16
17 #define per_cpu_offset(x) (__per_cpu_offset(x))
18
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
22
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
27
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()); }))
38
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)
47
48 extern void setup_per_cpu_areas(void);
49
50 #else /* ! SMP */
51
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)
56
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
60
61 #endif  /* SMP */
62
63 #define DECLARE_PER_CPU(type, name) extern __typeof__(type) per_cpu__##name
64
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)
67
68 #endif /* _ASM_X8664_PERCPU_H_ */