[tip:perf/core] perf lock: Document valid sort keys

[tip-bot for Marcin Slusarz <marcin.slusarz@gmail.com>]

Commit-ID:  9826e8329bc160e4cc58b83019f3f056965e42d0
Gitweb:     http://git.kernel.org/tip/9826e8329bc160e4cc58b83019f3f056965e42d0
Author:     Marcin Slusarz <marcin.slusarz@gmail.com>
AuthorDate: Tue, 22 Feb 2011 21:53:12 +0100
Committer:  Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Wed, 23 Feb 2011 07:29:33 -0300

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>
---
 tools/perf/Documentation/perf-lock.txt |   12 ++++++++++--
 tools/perf/builtin-lock.c              |    2 +-
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/tools/perf/Documentation/perf-lock.txt b/tools/perf/Documentation/perf-lock.txt
index 921de25..4a26a2f 100644
--- a/tools/perf/Documentation/perf-lock.txt
+++ b/tools/perf/Documentation/perf-lock.txt
@@ -24,8 +24,8 @@ and statistics with this 'perf lock' command.
 
   'perf lock report' reports statistical data.
 
-OPTIONS
--------
+COMMON OPTIONS
+--------------
 
 -i::
 --input=<file>::
@@ -39,6 +39,14 @@ OPTIONS
 --dump-raw-trace::
         Dump raw trace in ASCII.
 
+REPORT OPTIONS
+--------------
+
+-k::
+--key=<value>::
+        Sorting key. Possible values: acquired (default), contended,
+        wait_total, wait_max, wait_min.
+
 SEE ALSO
 --------
 linkperf:perf[1]
diff --git a/tools/perf/builtin-lock.c b/tools/perf/builtin-lock.c
index e00d938..2e93f99 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()
 };