tools/include/asm/barrier.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #include <linux/compiler.h>
   3 #if defined(__i386__) || defined(__x86_64__)
   4 #include "../../arch/x86/include/asm/barrier.h"
   5 #elif defined(__arm__)
   6 #include "../../arch/arm/include/asm/barrier.h"
   7 #elif defined(__aarch64__)
   8 #include "../../arch/arm64/include/asm/barrier.h"
   9 #elif defined(__powerpc__)
  10 #include "../../arch/powerpc/include/asm/barrier.h"
  11 #elif defined(__s390__)
  12 #include "../../arch/s390/include/asm/barrier.h"
  13 #elif defined(__sh__)
  14 #include "../../arch/sh/include/asm/barrier.h"
  15 #elif defined(__sparc__)
  16 #include "../../arch/sparc/include/asm/barrier.h"
  17 #elif defined(__tile__)
  18 #include "../../arch/tile/include/asm/barrier.h"
  19 #elif defined(__alpha__)
  20 #include "../../arch/alpha/include/asm/barrier.h"
  21 #elif defined(__mips__)
  22 #include "../../arch/mips/include/asm/barrier.h"
  23 #elif defined(__ia64__)
  24 #include "../../arch/ia64/include/asm/barrier.h"
  25 #elif defined(__xtensa__)
  26 #include "../../arch/xtensa/include/asm/barrier.h"
  27 #else
  28 #include <asm-generic/barrier.h>
  29 #endif
  30
  31 /*
  32  * Generic fallback smp_*() definitions for archs that haven't
  33  * been updated yet.
  34  */
  35
  36 #ifndef smp_rmb
  37 # define smp_rmb()      rmb()
  38 #endif
  39
  40 #ifndef smp_wmb
  41 # define smp_wmb()      wmb()
  42 #endif
  43
  44 #ifndef smp_mb
  45 # define smp_mb()       mb()
  46 #endif
  47
  48 #ifndef smp_store_release
  49 # define smp_store_release(p, v)                \
  50 do {                                            \
  51         smp_mb();                               \
  52         WRITE_ONCE(*p, v);                      \
  53 } while (0)
  54 #endif
  55
  56 #ifndef smp_load_acquire
  57 # define smp_load_acquire(p)                    \
  58 ({                                              \
  59         typeof(*p) ___p1 = READ_ONCE(*p);       \
  60         smp_mb();                               \
  61         ___p1;                                  \
  62 })
  63 #endif