linux-kernel - [PATCH 03/10] perf: Humanize lock flags in perf lock

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Date:	Sun,  9 May 2010 22:43:31 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Paul Mackerras <paulus@...ba.org>,
	Hitoshi Mitake <mitake@....info.waseda.ac.jp>
Subject: [PATCH 03/10] perf: Humanize lock flags in perf lock

Use an enum instead of plain constants for lock flags.

Signed-off-by: Frederic Weisbecker <fweisbec@...il.com>
Cc: Ingo Molnar <mingo@...e.hu>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Hitoshi Mitake <mitake@....info.waseda.ac.jp>
---
 tools/perf/builtin-lock.c |   11 ++++++++---
 1 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/tools/perf/builtin-lock.c b/tools/perf/builtin-lock.c
index 1e93179..3b304ed 100644
--- a/tools/perf/builtin-lock.c
+++ b/tools/perf/builtin-lock.c
@@ -397,6 +397,11 @@ enum broken_state {
 
 static int bad_hist[BROKEN_MAX];
 
+enum acquire_flags {
+	TRY_LOCK = 1,
+	READ_LOCK = 2,
+};
+
 static void
 report_lock_acquire_event(struct trace_acquire_event *acquire_event,
 			struct event *__event __used,
@@ -421,9 +426,9 @@ report_lock_acquire_event(struct trace_acquire_event *acquire_event,
 		if (!acquire_event->flag) {
 			seq->state = SEQ_STATE_ACQUIRING;
 		} else {
-			if (acquire_event->flag & 1)
+			if (acquire_event->flag & TRY_LOCK)
 				ls->nr_trylock++;
-			if (acquire_event->flag & 2)
+			if (acquire_event->flag & READ_LOCK)
 				ls->nr_readlock++;
 			seq->state = SEQ_STATE_READ_ACQUIRED;
 			seq->read_count = 1;
@@ -431,7 +436,7 @@ report_lock_acquire_event(struct trace_acquire_event *acquire_event,
 		}
 		break;
 	case SEQ_STATE_READ_ACQUIRED:
-		if (acquire_event->flag & 2) {
+		if (acquire_event->flag & READ_LOCK) {
 			seq->read_count++;
 			ls->nr_acquired++;
 			goto end;
-- 
1.6.2.3

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