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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 422 | giacomo | 1 | #ifndef _ASM_GENERIC_PERCPU_H_ |
| 2 | #define _ASM_GENERIC_PERCPU_H_ |
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| 3 | #include <linux/compiler.h> |
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| 4 | |||
| 5 | #define __GENERIC_PER_CPU |
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| 6 | #ifdef CONFIG_SMP |
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| 7 | |||
| 8 | extern unsigned long __per_cpu_offset[NR_CPUS]; |
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| 9 | |||
| 10 | /* Separate out the type, so (int[3], foo) works. */ |
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| 11 | #define DEFINE_PER_CPU(type, name) \ |
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| 12 | __attribute__((__section__(".data.percpu"))) __typeof__(type) per_cpu__##name |
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| 13 | |||
| 14 | /* var is in discarded region: offset to particular copy we want */ |
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| 15 | #define per_cpu(var, cpu) (*RELOC_HIDE(&per_cpu__##var, __per_cpu_offset[cpu])) |
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| 16 | #define __get_cpu_var(var) per_cpu(var, smp_processor_id()) |
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| 17 | |||
| 18 | /* A macro to avoid #include hell... */ |
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| 19 | #define percpu_modcopy(pcpudst, src, size) \ |
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| 20 | do { \ |
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| 21 | unsigned int __i; \ |
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| 22 | for (__i = 0; __i < NR_CPUS; __i++) \ |
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| 23 | if (cpu_possible(__i)) \ |
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| 24 | memcpy((pcpudst)+__per_cpu_offset[__i], \ |
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| 25 | (src), (size)); \ |
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| 26 | } while (0) |
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| 27 | #else /* ! SMP */ |
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| 28 | |||
| 29 | #define DEFINE_PER_CPU(type, name) \ |
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| 30 | __typeof__(type) per_cpu__##name |
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| 31 | |||
| 32 | #define per_cpu(var, cpu) ((void)cpu, per_cpu__##var) |
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| 33 | #define __get_cpu_var(var) per_cpu__##var |
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| 34 | |||
| 35 | #endif /* SMP */ |
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| 36 | |||
| 37 | #define DECLARE_PER_CPU(type, name) extern __typeof__(type) per_cpu__##name |
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| 38 | |||
| 39 | #define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(per_cpu__##var) |
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| 40 | #define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(per_cpu__##var) |
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| 41 | |||
| 42 | #endif /* _ASM_GENERIC_PERCPU_H_ */ |