From: Namhyung Kim <[email protected]>

When comparing entries for collapsing put the given entry first, and
then the iterated entry.  This is not the case of hist_entry__cmp()
when called if given sort keys don't require collapsing.  So change
the order for the sake of consistency.  It will be required for
matching and/or linking multiple hist entries.

Cc: Jiri Olsa <[email protected]>
Cc: Stephane Eranian <[email protected]>
Signed-off-by: Namhyung Kim <[email protected]>
---
 tools/perf/util/hist.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index 82df1b26f0d4..161c35e7ed0e 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -433,7 +433,7 @@ static bool hists__collapse_insert_entry(struct hists 
*hists __maybe_unused,
                parent = *p;
                iter = rb_entry(parent, struct hist_entry, rb_node_in);
 
-               cmp = hist_entry__collapse(iter, he);
+               cmp = hist_entry__collapse(he, iter);
 
                if (!cmp) {
                        he_stat__add_stat(&iter->stat, &he->stat);
-- 
1.7.11.7

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