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git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blob - include/asm-x86_64/percpu.h
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
14 #define __per_cpu_offset(cpu) (cpu_pda[cpu].data_offset)
15 #define __my_cpu_offset() read_pda(data_offset)
17 /* Separate out the type, so (int[3], foo) works. */
18 #define DEFINE_PER_CPU(type, name) \
19 __attribute__((__section__(".data.percpu"))) __typeof__(type) per_cpu__##name
21 /* var is in discarded region: offset to particular copy we want */
22 #define per_cpu(var, cpu) (*RELOC_HIDE(&per_cpu__##var, __per_cpu_offset(cpu)))
23 #define __get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __my_cpu_offset()))
25 /* A macro to avoid #include hell... */
26 #define percpu_modcopy(pcpudst, src, size) \
29 for (__i = 0; __i < NR_CPUS; __i++) \
30 if (cpu_possible(__i)) \
31 memcpy((pcpudst)+__per_cpu_offset(__i), \
35 extern void setup_per_cpu_areas(void);
39 #define DEFINE_PER_CPU(type, name) \
40 __typeof__(type) per_cpu__##name
42 #define per_cpu(var, cpu) (*((void)(cpu), &per_cpu__##var))
43 #define __get_cpu_var(var) per_cpu__##var
47 #define DECLARE_PER_CPU(type, name) extern __typeof__(type) per_cpu__##name
49 #define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(per_cpu__##var)
50 #define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(per_cpu__##var)
52 #endif /* _ASM_X8664_PERCPU_H_ */