perf tools: Consolidate management of default sort orders

The perf uses different default sort orders for different use-cases,
and this was scattered throughout the code.  Add get_default_sort_
order() function to handle this and change initial value of sort_order
to NULL to distinguish it from user-given one.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1400480762-22852-10-git-send-email-namhyung@kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>

1 files changed, 1 insertions, 2 deletions

diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 4fef1e415129..34764b6eabf9 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -1137,8 +1137,7 @@ int cmd_top(int argc, const char **argv, const char *prefix __maybe_unused)
         if (argc)
                 usage_with_options(top_usage, options);
 
-        if (sort_order == default_sort_order)
-                sort_order = "dso,symbol";
+        sort__mode = SORT_MODE__TOP;
 
         if (setup_sorting() < 0) {
                 parse_options_usage(top_usage, options, "s", 1);