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 */