perf lock: Document valid sort keys

Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <20110222205312.GA18474@joi.lan>
Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/tools/perf/builtin-lock.c b/tools/perf/builtin-lock.c
index e00d93847c44..2e93f99b1480 100644
--- a/tools/perf/builtin-lock.c
+++ b/tools/perf/builtin-lock.c
@@ -893,7 +893,7 @@ static const char * const report_usage[] = {
 
 static const struct option report_options[] = {
         OPT_STRING('k', "key", &sort_key, "acquired",
-                    "key for sorting"),
+                    "key for sorting (acquired / contended / wait_total / wait_max / wait_min)"),
         /* TODO: type */
         OPT_END()
 };