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| author |   Russell King <rmk+kernel@arm.linux.org.uk> | 2015-07-07 12:35:33 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2015-07-07 12:35:33 +0100 |
| commit | 06be5eefe1192eb8ce8d07497f67595b6bfe9741 (patch) | |
| tree | 80f1987d4970f8079681f8be0c135cafc8d6329a /tools/arch/arm64/include/asm/barrier.h | |
| parent | ARM: fix lockdep unannotated irqs-off warning (diff) | |
| parent | ARM: avoid unwanted GCC memset()/memcpy() optimisations for IO variants (diff) | |
| download | linux-dev-06be5eefe1192eb8ce8d07497f67595b6bfe9741.tar.xz linux-dev-06be5eefe1192eb8ce8d07497f67595b6bfe9741.zip | |
Merge branches 'fixes' and 'ioremap' into for-linus
Diffstat (limited to 'tools/arch/arm64/include/asm/barrier.h')
| -rw-r--r-- | tools/arch/arm64/include/asm/barrier.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/tools/arch/arm64/include/asm/barrier.h b/tools/arch/arm64/include/asm/barrier.h new file mode 100644 index 000000000000..a0483c8e0142 --- /dev/null +++ b/tools/arch/arm64/include/asm/barrier.h @@ -0,0 +1,16 @@ +#ifndef _TOOLS_LINUX_ASM_AARCH64_BARRIER_H +#define _TOOLS_LINUX_ASM_AARCH64_BARRIER_H + +/* + * From tools/perf/perf-sys.h, last modified in: + * f428ebd184c82a7914b2aa7e9f868918aaf7ea78 perf tools: Fix AAAAARGH64 memory barriers + * + * XXX: arch/arm64/include/asm/barrier.h in the kernel sources use dsb, is this + * a case like for arm32 where we do things differently in userspace? + */ + +#define mb() asm volatile("dmb ish" ::: "memory") +#define wmb() asm volatile("dmb ishst" ::: "memory") +#define rmb() asm volatile("dmb ishld" ::: "memory") + +#endif /* _TOOLS_LINUX_ASM_AARCH64_BARRIER_H */ |