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#ifndef _ASM_X8664_PERCPU_H_ #define _ASM_X8664_PERCPU_H_ #include <linux/compiler.h> /* Same as asm-generic/percpu.h, except that we store the per cpu offset in the PDA. Longer term the PDA and every per cpu variable should be just put into a single section and referenced directly from %gs */ #ifdef CONFIG_SMP #include <asm/pda.h> #define __per_cpu_offset(cpu) (cpu_pda(cpu)->data_offset) #define __my_cpu_offset() read_pda(data_offset) /* Separate out the type, so (int[3], foo) works. */ #define DEFINE_PER_CPU(type, name) \ __attribute__((__section__(".data.percpu"))) __typeof__(type) per_cpu__##name /* var is in discarded region: offset to particular copy we want */ #define per_cpu(var, cpu) (*RELOC_HIDE(&per_cpu__##var, __per_cpu_offset(cpu))) #define __get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __my_cpu_offset())) /* A macro to avoid #include hell... */ #define percpu_modcopy(pcpudst, src, size) \ do { \ unsigned int __i; \ for (__i = 0; __i < NR_CPUS; __i++) \ if (cpu_possible(__i)) \ memcpy((pcpudst)+__per_cpu_offset(__i), \ (src), (size)); \ } while (0) extern void setup_per_cpu_areas(void); #else /* ! SMP */ #define DEFINE_PER_CPU(type, name) \ __typeof__(type) per_cpu__##name #define per_cpu(var, cpu) (*((void)(cpu), &per_cpu__##var)) #define __get_cpu_var(var) per_cpu__##var #endif /* SMP */ #define DECLARE_PER_CPU(type, name) extern __typeof__(type) per_cpu__##name #define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(per_cpu__##var) #define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(per_cpu__##var) #endif /* _ASM_X8664_PERCPU_H_ */