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git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - include/asm-generic/percpu.h
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1 #ifndef _ASM_GENERIC_PERCPU_H_
2 #define _ASM_GENERIC_PERCPU_H_
3 #include <linux/compiler.h>
4 #include <linux/threads.h>
6 #define __GENERIC_PER_CPU
9 extern unsigned long __per_cpu_offset
[NR_CPUS
];
11 #define per_cpu_offset(x) (__per_cpu_offset[x])
13 /* Separate out the type, so (int[3], foo) works. */
14 #define DEFINE_PER_CPU(type, name) \
15 __attribute__((__section__(".data.percpu"))) __typeof__(type) per_cpu__##name
17 /* var is in discarded region: offset to particular copy we want */
18 #define per_cpu(var, cpu) (*({ \
19 extern int simple_identifier_##var(void); \
20 RELOC_HIDE(&per_cpu__##var, __per_cpu_offset[cpu]); }))
21 #define __get_cpu_var(var) per_cpu(var, smp_processor_id())
22 #define __raw_get_cpu_var(var) per_cpu(var, raw_smp_processor_id())
24 /* A macro to avoid #include hell... */
25 #define percpu_modcopy(pcpudst, src, size) \
28 for_each_possible_cpu(__i) \
29 memcpy((pcpudst)+__per_cpu_offset[__i], \
34 #define DEFINE_PER_CPU(type, name) \
35 __typeof__(type) per_cpu__##name
37 #define per_cpu(var, cpu) (*((void)(cpu), &per_cpu__##var))
38 #define __get_cpu_var(var) per_cpu__##var
39 #define __raw_get_cpu_var(var) per_cpu__##var
43 #define DECLARE_PER_CPU(type, name) extern __typeof__(type) per_cpu__##name
45 #define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(per_cpu__##var)
46 #define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(per_cpu__##var)
48 #endif /* _ASM_GENERIC_PERCPU_H_ */