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Subject[PATCH 10/30] perf tools: Move barrier() definition to tools/include/linux/compiler.h
Date
From: Arnaldo Carvalho de Melo <acme@redhat.com>

To make it generally accessible by other tools/ projects, also will be
used in the tools/arch/*/include/asm/barrier.h files that are being
introduced now.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-qnjdqwu3vcnt14vqmr6wu788@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/include/linux/compiler.h | 4 ++++
tools/perf/perf-sys.h | 2 --
2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/tools/include/linux/compiler.h b/tools/include/linux/compiler.h
index 88461f0..f0e7267 100644
--- a/tools/include/linux/compiler.h
+++ b/tools/include/linux/compiler.h
@@ -1,6 +1,10 @@
#ifndef _TOOLS_LINUX_COMPILER_H_
#define _TOOLS_LINUX_COMPILER_H_

+/* Optimization barrier */
+/* The "volatile" is due to gcc bugs */
+#define barrier() __asm__ __volatile__("": : :"memory")
+
#ifndef __always_inline
# define __always_inline inline __attribute__((always_inline))
#endif
diff --git a/tools/perf/perf-sys.h b/tools/perf/perf-sys.h
index bf349ea..f44e53e 100644
--- a/tools/perf/perf-sys.h
+++ b/tools/perf/perf-sys.h
@@ -153,8 +153,6 @@
#define CPUINFO_PROC {"model name"}
#endif

-#define barrier() asm volatile ("" ::: "memory")
-
#ifndef cpu_relax
#define cpu_relax() barrier()
#endif
--
2.1.0


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