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authorFrederic Weisbecker <fweisbec@gmail.com>2014-01-14 16:37:16 +0100
committerArnaldo Carvalho de Melo <acme@redhat.com>2014-01-17 15:25:24 +0100
commit2a29190c040c0b11e39197c67abf6f87e0a61f9a (patch)
tree68187bf0c9d8a1eb653d230dbd0d38ffd0046a27 /tools
parentperf callchain: Spare double comparison of callchain first entry (diff)
downloadlinux-2a29190c040c0b11e39197c67abf6f87e0a61f9a.tar.xz
linux-2a29190c040c0b11e39197c67abf6f87e0a61f9a.zip
perf tools: Remove unnecessary callchain cursor state restore on unmatch
If a new callchain branch doesn't match a single entry of the node that it is given against comparison in append_chain(), then the cursor is expected to be at the same position as it was before the comparison loop. As such, there is no need to restore the cursor position on exit in case of non matching branches. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Reviewed-by: Namhyung Kim <namhyung@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1389713836-13375-4-git-send-email-fweisbec@gmail.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/util/callchain.c3
1 files changed, 0 insertions, 3 deletions
diff --git a/tools/perf/util/callchain.c b/tools/perf/util/callchain.c
index 662867d5c374..8d9db454f1a9 100644
--- a/tools/perf/util/callchain.c
+++ b/tools/perf/util/callchain.c
@@ -388,7 +388,6 @@ append_chain(struct callchain_node *root,
struct callchain_cursor *cursor,
u64 period)
{
- struct callchain_cursor_node *curr_snap = cursor->curr;
struct callchain_list *cnode;
u64 start = cursor->pos;
bool found = false;
@@ -420,8 +419,6 @@ append_chain(struct callchain_node *root,
/* matches not, relay no the parent */
if (!found) {
WARN_ONCE(!cmp, "Chain comparison error\n");
- cursor->curr = curr_snap;
- cursor->pos = start;
return cmp;
}