tools/arch/arm64/include/asm/barrier.h

   1 #ifndef _TOOLS_LINUX_ASM_AARCH64_BARRIER_H
   2 #define _TOOLS_LINUX_ASM_AARCH64_BARRIER_H
   3
   4 /*
   5  * From tools/perf/perf-sys.h, last modified in:
   6  * f428ebd184c82a7914b2aa7e9f868918aaf7ea78 perf tools: Fix AAAAARGH64 memory barriers
   7  *
   8  * XXX: arch/arm64/include/asm/barrier.h in the kernel sources use dsb, is this
   9  * a case like for arm32 where we do things differently in userspace?
  10  */
  11
  12 #define mb()            asm volatile("dmb ish" ::: "memory")
  13 #define wmb()           asm volatile("dmb ishst" ::: "memory")
  14 #define rmb()           asm volatile("dmb ishld" ::: "memory")
  15
  16 #endif /* _TOOLS_LINUX_ASM_AARCH64_BARRIER_H */