[PATCH] mqueue: nested locking annotation
authorPeter Zijlstra <a.p.zijlstra@chello.nl>
Tue, 6 Mar 2007 09:42:09 +0000 (01:42 -0800)
committerLinus Torvalds <torvalds@woody.linux-foundation.org>
Tue, 6 Mar 2007 17:30:25 +0000 (09:30 -0800)
Fix http://bugzilla.kernel.org/show_bug.cgi?id=8130

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
ipc/mqueue.c

index 0b5ecbe5f0456c121f2af016292fb0123f4bf4cd..554ac368be7945de13149bef0abdd0c1bb2cf7c9 100644 (file)
@@ -731,7 +731,8 @@ asmlinkage long sys_mq_unlink(const char __user *u_name)
        if (IS_ERR(name))
                return PTR_ERR(name);
 
-       mutex_lock(&mqueue_mnt->mnt_root->d_inode->i_mutex);
+       mutex_lock_nested(&mqueue_mnt->mnt_root->d_inode->i_mutex,
+                       I_MUTEX_PARENT);
        dentry = lookup_one_len(name, mqueue_mnt->mnt_root, strlen(name));
        if (IS_ERR(dentry)) {
                err = PTR_ERR(dentry);