#ifndef _ASM_GENERIC_PERCPU_H_#define _ASM_GENERIC_PERCPU_H_#include <linux/compiler.h> #define __GENERIC_PER_CPU#ifdef CONFIG_SMP extern unsigned long __per_cpu_offset[NR_CPUS]; /* 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) per_cpu(var, smp_processor_id()) /* 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)#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_GENERIC_PERCPU_H_ */