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Unix_Linux

cache.h：源码内容

							#ifndef __LINUX_CACHE_H
#define __LINUX_CACHE_H
#include <linux/config.h>
#include <asm/cache.h>
#ifndef L1_CACHE_ALIGN
#define L1_CACHE_ALIGN(x) (((x)+(L1_CACHE_BYTES-1))&~(L1_CACHE_BYTES-1))
#endif
#ifndef SMP_CACHE_BYTES
#define SMP_CACHE_BYTES L1_CACHE_BYTES
#endif
#ifndef ____cacheline_aligned
#define ____cacheline_aligned __attribute__((__aligned__(SMP_CACHE_BYTES)))
#endif
#ifndef ____cacheline_aligned_in_smp
#ifdef CONFIG_SMP
#define ____cacheline_aligned_in_smp ____cacheline_aligned
#else
#define ____cacheline_aligned_in_smp
#endif /* CONFIG_SMP */
#endif
#ifndef __cacheline_aligned
#ifdef MODULE
#define __cacheline_aligned ____cacheline_aligned
#else
#define __cacheline_aligned					
  __attribute__((__aligned__(SMP_CACHE_BYTES),			
		 __section__(".data.cacheline_aligned")))
#endif
#endif /* __cacheline_aligned */
#ifndef __cacheline_aligned_in_smp
#ifdef CONFIG_SMP
#define __cacheline_aligned_in_smp __cacheline_aligned
#else
#define __cacheline_aligned_in_smp
#endif /* CONFIG_SMP */
#endif
#endif /* __LINUX_CACHE_H */

						