linux-kernel - [115/115] kernel/user.c: add lock release annotation on free

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Date:	Tue, 15 Feb 2011 17:46:21 -0800
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org,
	Dhaval Giani <dhaval.giani@...il.com>
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Namhyung Kim <namhyung@...il.com>, Ingo Molnar <mingo@...e.hu>,
	Mike Galbraith <efault@....de>
Subject: [115/115] kernel/user.c: add lock release annotation on free_user()

2.6.32-longterm review patch.  If anyone has any objections, please let us know.

------------------


From: Namhyung Kim <namhyung@...il.com>

commit 571428be550fbe37160596995e96ad398873fcbd upstream.

free_user() releases uidhash_lock but was missing annotation.  Add it.
This removes following sparse warnings:

 include/linux/spinlock.h:339:9: warning: context imbalance in 'free_user' - unexpected unlock
 kernel/user.c:120:6: warning: context imbalance in 'free_uid' - wrong count at exit

Signed-off-by: Namhyung Kim <namhyung@...il.com>
Cc: Ingo Molnar <mingo@...e.hu>
Cc: Dhaval Giani <dhaval.giani@...il.com>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: Mike Galbraith <efault@....de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>


---
 kernel/user.c |    1 +
 1 file changed, 1 insertion(+)

--- a/kernel/user.c
+++ b/kernel/user.c
@@ -91,6 +91,7 @@ static struct user_struct *uid_hash_find
  * upon function exit.
  */
 static void free_user(struct user_struct *up, unsigned long flags)
+	__releases(&uidhash_lock)
 {
 	uid_hash_remove(up);
 	spin_unlock_irqrestore(&uidhash_lock, flags);


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