| 1 | #ifndef _ASM_GENERIC_PERCPU_H_
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| 2 | #define _ASM_GENERIC_PERCPU_H_
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| 3 | #include <linux/compiler.h>
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| 4 |
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| 5 | #define __GENERIC_PER_CPU
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| 6 | #ifdef CONFIG_SMP
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| 7 |
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| 8 | extern unsigned long __per_cpu_offset[NR_CPUS];
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| 9 |
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| 10 | #define per_cpu_offset(x) (__per_cpu_offset[x])
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| 11 |
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| 12 |
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| 13 | #define DEFINE_PER_CPU(type, name) \
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| 14 | __attribute__((__section__(".data.percpu"))) __typeof__(type) per_cpu__##name
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| 15 |
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| 16 |
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| 17 | #define per_cpu(var, cpu) (*({ \
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| 18 | extern int simple_identifier_##var(void); \
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| 19 | RELOC_HIDE(&per_cpu__##var, __per_cpu_offset[cpu]); }))
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| 20 | #define __get_cpu_var(var) per_cpu(var, smp_processor_id())
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| 21 | #define __raw_get_cpu_var(var) per_cpu(var, raw_smp_processor_id())
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| 22 |
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| 23 |
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| 24 | #define percpu_modcopy(pcpudst, src, size) \
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| 25 | do { \
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| 26 | unsigned int __i; \
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| 27 | for_each_possible_cpu(__i) \
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| 28 | memcpy((pcpudst)+__per_cpu_offset[__i], \
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| 29 | (src), (size)); \
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| 30 | } while (0)
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| 31 | #else
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| 32 |
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| 33 | #define DEFINE_PER_CPU(type, name) \
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| 34 | __typeof__(type) per_cpu__##name
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| 35 |
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| 36 | #define per_cpu(var, cpu) (*((void)(cpu), &per_cpu__##var))
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| 37 | #define __get_cpu_var(var) per_cpu__##var
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| 38 | #define __raw_get_cpu_var(var) per_cpu__##var
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| 39 |
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| 40 | #endif
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| 41 |
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| 42 | #define DECLARE_PER_CPU(type, name) extern __typeof__(type) per_cpu__##name
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| 43 |
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| 44 | #define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(per_cpu__##var)
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| 45 | #define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(per_cpu__##var)
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| 46 |
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| 47 | #endif
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