perf sched: Cleanup, remove unused variables in map_switch_event()

In map_switch_event(), we don't care the previous process currently,
this patch remove the infomation we get but not used.

Signed-off-by: Dongsheng Yang <yangds.fnst@cn.fujitsu.com>
Link: http://lkml.kernel.org/r/1400218625-14613-1-git-send-email-yangds.fnst@cn.fujitsu.com
Signed-off-by: Jiri Olsa <jolsa@kernel.org>

1 files changed, 2 insertions, 4 deletions

diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index 0b4fe533e1a1..d7176830b9b2 100644
--- a/tools/perf/builtin-sched.c
+++ b/tools/perf/builtin-sched.c
@@ -1266,9 +1266,8 @@ static int process_sched_wakeup_event(struct perf_tool *tool,
 static int map_switch_event(struct perf_sched *sched, struct perf_evsel *evsel,
                             struct perf_sample *sample, struct machine *machine)
 {
-        const u32 prev_pid = perf_evsel__intval(evsel, sample, "prev_pid"),
-                  next_pid = perf_evsel__intval(evsel, sample, "next_pid");
-        struct thread *sched_out __maybe_unused, *sched_in;
+        const u32 next_pid = perf_evsel__intval(evsel, sample, "next_pid");
+        struct thread *sched_in;
         int new_shortname;
         u64 timestamp0, timestamp = sample->time;
         s64 delta;
@@ -1291,7 +1290,6 @@ static int map_switch_event(struct perf_sched *sched, struct perf_evsel *evsel,
                 return -1;
         }
 
-        sched_out = machine__findnew_thread(machine, 0, prev_pid);
         sched_in = machine__findnew_thread(machine, 0, next_pid);
 
         sched->curr_thread[this_cpu] = sched_in;