perf tools: Move barrier() definition to tools/include/linux/compiler.h

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>

diff --git a/tools/include/linux/compiler.h b/tools/include/linux/compiler.h
index 88461f09cc860b0d17ab87c3d4a629ee44214af7..f0e72674c52d2c9b88b46cb281db39fe8fb68d8d 100644 (file)
--- 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 bf349ea3984f6cd90d1a913f6b06d1a80e7852e3..f44e53efd9a45038ce6984ae0a103e6925edb1a8 100644 (file)
--- 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