Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input

[firefly-linux-kernel-4.4.55.git] / tools / perf / util / evlist.c

diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 8d00039d6a20ab333441dae4816f52ad3fb00149..d51a5200c8af77b76e98c85d55f8acee8db304f0 100644 (file)
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -1181,6 +1181,10 @@ int perf_evlist__apply_filters(struct perf_evlist *evlist, struct perf_evsel **e
                if (evsel->filter == NULL)
                        continue;
 
+               /*
+                * filters only work for tracepoint event, which doesn't have cpu limit.
+                * So evlist and evsel should always be same.
+                */
                err = perf_evsel__apply_filter(evsel, ncpus, nthreads, evsel->filter);
                if (err) {
                        *err_evsel = evsel;