perf tools: Add union u64_swap type for swapping u64 data

The following union:
  union {
        u64 val64;
        u32 val32[2];
  } u;

is used on more than one place in perf code and will be used more in
upcomming patches.

Adding union u64_swap to have it defined globaly so we dont need to
redefine it all the time.

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Tested-by: David Ahern <dsahern@gmail.com>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1337151548-2396-4-git-send-email-jolsa@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

2 files changed, 7 insertions, 8 deletions

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 9abd8ac508e2..57e4ce57bbcc 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -462,10 +462,7 @@ int perf_event__parse_sample(const union perf_event *event, u64 type,
          * used for cross-endian analysis. See git commit 65014ab3
          * for why this goofiness is needed.
          */
-        union {
-                u64 val64;
-                u32 val32[2];
-        } u;
+        union u64_swap u;
 
         memset(data, 0, sizeof(*data));
         data->cpu = data->pid = data->tid = -1;
@@ -608,10 +605,7 @@ int perf_event__synthesize_sample(union perf_event *event, u64 type,
          * used for cross-endian analysis. See git commit 65014ab3
          * for why this goofiness is needed.
          */
-        union {
-                u64 val64;
-                u32 val32[2];
-        } u;
+        union u64_swap u;
 
         array = event->sample.array;
 
diff --git a/tools/perf/util/types.h b/tools/perf/util/types.h
index 5f3689a3d085..c51fa6b70a28 100644
--- a/tools/perf/util/types.h
+++ b/tools/perf/util/types.h
@@ -16,4 +16,9 @@ typedef signed short	   s16;
 typedef unsigned char      u8;
 typedef signed char        s8;
 
+union u64_swap {
+        u64 val64;
+        u32 val32[2];
+};
+
 #endif /* __PERF_TYPES_H */