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

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _TOOLS_LINUX_ASM_AARCH64_BARRIER_H
   3 #define _TOOLS_LINUX_ASM_AARCH64_BARRIER_H
   4
   5 /*
   6  * From tools/perf/perf-sys.h, last modified in:
   7  * f428ebd184c82a7914b2aa7e9f868918aaf7ea78 perf tools: Fix AAAAARGH64 memory barriers
   8  *
   9  * XXX: arch/arm64/include/asm/barrier.h in the kernel sources use dsb, is this
  10  * a case like for arm32 where we do things differently in userspace?
  11  */
  12
  13 #define mb()            asm volatile("dmb ish" ::: "memory")
  14 #define wmb()           asm volatile("dmb ishst" ::: "memory")
  15 #define rmb()           asm volatile("dmb ishld" ::: "memory")
  16
  17 #endif /* _TOOLS_LINUX_ASM_AARCH64_BARRIER_H */