linux-kernel - [PATCH 5/5] lockdep: Fix the way to initialize class

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Message-Id: <1262860795-5745-6-git-send-email-mitake@dcl.info.waseda.ac.jp>
Date:	Thu,  7 Jan 2010 19:39:55 +0900
From:	Hitoshi Mitake <mitake@....info.waseda.ac.jp>
To:	mingo@...e.hu
Cc:	linux-kernel@...r.kernel.org,
	Hitoshi Mitake <mitake@....info.waseda.ac.jp>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Greg Kroah-Hartman <gregkh@...e.de>
Subject: [PATCH 5/5] lockdep: Fix the way to initialize class_mutex for information of file and line

This patch adds __FILE__ and __LINE__ to arguments passed for
__mutex_init() called in __class_register().
This affects to lockdep_map of class_mutex of struct class_private,
and these will be used to make trace lock events more human friendly.

Signed-off-by: Hitoshi Mitake <mitake@....info.waseda.ac.jp>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Greg Kroah-Hartman <gregkh@...e.de>
---
 drivers/base/class.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/drivers/base/class.c b/drivers/base/class.c
index 161746d..cc0630f 100644
--- a/drivers/base/class.c
+++ b/drivers/base/class.c
@@ -162,7 +162,8 @@ int __class_register(struct class *cls, struct lock_class_key *key)
 	klist_init(&cp->class_devices, klist_class_dev_get, klist_class_dev_put);
 	INIT_LIST_HEAD(&cp->class_interfaces);
 	kset_init(&cp->class_dirs);
-	__mutex_init(&cp->class_mutex, "struct class mutex", key);
+	__mutex_init(&cp->class_mutex, "struct class mutex", key,
+		     __FILE__, __LINE__);
 	error = kobject_set_name(&cp->class_subsys.kobj, "%s", cls->name);
 	if (error) {
 		kfree(cp);
-- 
1.6.5.2

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