LXR linux-old/include/linux/cache.h

   1#ifndef __LINUX_CACHE_H
   2#define __LINUX_CACHE_H
   3
   4#include <linux/config.h>
   5#include <asm/cache.h>
   6
   7#ifndef L1_CACHE_ALIGN
   8#define L1_CACHE_ALIGN(x) (((x)+(L1_CACHE_BYTES-1))&~(L1_CACHE_BYTES-1))
   9#endif
  10
  11#ifndef SMP_CACHE_BYTES
  12#define SMP_CACHE_BYTES L1_CACHE_BYTES
  13#endif
  14
  15#ifndef ____cacheline_aligned
  16#define ____cacheline_aligned __attribute__((__aligned__(SMP_CACHE_BYTES)))
  17#endif
  18
  19#ifndef ____cacheline_aligned_in_smp
  20#ifdef CONFIG_SMP
  21#define ____cacheline_aligned_in_smp ____cacheline_aligned
  22#else
  23#define ____cacheline_aligned_in_smp
  24#endif /* CONFIG_SMP */
  25#endif
  26
  27#ifndef __cacheline_aligned
  28#ifdef MODULE
  29#define __cacheline_aligned ____cacheline_aligned
  30#else
  31#define __cacheline_aligned                                     \
  32  __attribute__((__aligned__(SMP_CACHE_BYTES),                  \
  33                 __section__(".data.cacheline_aligned")))
  34#endif
  35#endif /* __cacheline_aligned */
  36
  37#ifndef __cacheline_aligned_in_smp
  38#ifdef CONFIG_SMP
  39#define __cacheline_aligned_in_smp __cacheline_aligned
  40#else
  41#define __cacheline_aligned_in_smp
  42#endif /* CONFIG_SMP */
  43#endif
  44
  45#endif /* __LINUX_CACHE_H */
  46