perf tools: Move ACCESS_ONCE from perf.h header
Into tools/include/linux/compiler.h header.
Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/n/tip-9sk90owm370kuq3f0ssjjui2@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
diff --git a/tools/include/linux/compiler.h b/tools/include/linux/compiler.h
index fbc6665..88461f0 100644
--- a/tools/include/linux/compiler.h
+++ b/tools/include/linux/compiler.h
@@ -35,4 +35,6 @@
# define unlikely(x) __builtin_expect(!!(x), 0)
#endif
+#define ACCESS_ONCE(x) (*(volatile typeof(x) *)&(x))
+
#endif /* _TOOLS_LINUX_COMPILER_H */