include/linux/cache.h

   1 #ifndef __LINUX_CACHE_H
   2 #define __LINUX_CACHE_H
   3
   4 #include <linux/kernel.h>
   5 #include <linux/config.h>
   6 #include <asm/cache.h>
   7
   8 #ifndef L1_CACHE_ALIGN
   9 #define L1_CACHE_ALIGN(x) ALIGN(x, L1_CACHE_BYTES)
  10 #endif
  11
  12 #ifndef SMP_CACHE_BYTES
  13 #define SMP_CACHE_BYTES L1_CACHE_BYTES
  14 #endif
  15
  16 #ifndef ____cacheline_aligned
  17 #define ____cacheline_aligned __attribute__((__aligned__(SMP_CACHE_BYTES)))
  18 #endif
  19
  20 #ifndef ____cacheline_aligned_in_smp
  21 #ifdef CONFIG_SMP
  22 #define ____cacheline_aligned_in_smp ____cacheline_aligned
  23 #else
  24 #define ____cacheline_aligned_in_smp
  25 #endif /* CONFIG_SMP */
  26 #endif
  27
  28 #ifndef __cacheline_aligned
  29 #define __cacheline_aligned                                     \
  30   __attribute__((__aligned__(SMP_CACHE_BYTES),                  \
  31                  __section__(".data.cacheline_aligned")))
  32 #endif /* __cacheline_aligned */
  33
  34 #ifndef __cacheline_aligned_in_smp
  35 #ifdef CONFIG_SMP
  36 #define __cacheline_aligned_in_smp __cacheline_aligned
  37 #else
  38 #define __cacheline_aligned_in_smp
  39 #endif /* CONFIG_SMP */
  40 #endif
  41
  42 #if !defined(____cacheline_maxaligned_in_smp)
  43 #if defined(CONFIG_SMP)
  44 #define ____cacheline_maxaligned_in_smp \
  45         __attribute__((__aligned__(1 << (L1_CACHE_SHIFT_MAX))))
  46 #else
  47 #define ____cacheline_maxaligned_in_smp
  48 #endif
  49 #endif
  50
  51 #endif /* __LINUX_CACHE_H */