perf hists: Move locking to its call-sites
It's a preparation patch to eliminate unneeded locking in the perf
report path.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1368497347-9628-5-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index 7e0fa62..b11a6cf 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -347,8 +347,6 @@
struct hist_entry *he;
int cmp;
- pthread_mutex_lock(&hists->lock);
-
p = &hists->entries_in->rb_node;
while (*p != NULL) {
@@ -394,14 +392,12 @@
he = hist_entry__new(entry);
if (!he)
- goto out_unlock;
+ return NULL;
rb_link_node(&he->rb_node_in, parent, p);
rb_insert_color(&he->rb_node_in, hists->entries_in);
out:
hist_entry__add_cpumode_period(he, al->cpumode, period);
-out_unlock:
- pthread_mutex_unlock(&hists->lock);
return he;
}