From: Frederic Weisbecker <fweisbec@gmail.com>
Date: Thu, 7 Jan 2010 14:55:31 +0000 (+0100)
Subject: reiserfs: Relax reiserfs_xattr_set_handle() while acquiring xattr locks
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=31370f62baa1460b785cee9944bdcaf63d19e567;p=openwrt%2Fstaging%2Fblogic.git

reiserfs: Relax reiserfs_xattr_set_handle() while acquiring xattr locks

Fix remaining xattr locks acquired in reiserfs_xattr_set_handle()
while we are holding the reiserfs lock to avoid lock inversions.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Christian Kujau <lists@nerdbynature.de>
Cc: Alexander Beregalov <a.beregalov@gmail.com>
Cc: Chris Mason <chris.mason@oracle.com>
Cc: Ingo Molnar <mingo@elte.hu>
---

diff --git a/fs/reiserfs/xattr.c b/fs/reiserfs/xattr.c
index 4899d789ba67..7fee995c25ab 100644
--- a/fs/reiserfs/xattr.c
+++ b/fs/reiserfs/xattr.c
@@ -559,8 +559,12 @@ reiserfs_xattr_set_handle(struct reiserfs_transaction_handle *th,
 			.ia_size = buffer_size,
 			.ia_valid = ATTR_SIZE | ATTR_CTIME,
 		};
+
+		reiserfs_write_unlock(inode->i_sb);
 		mutex_lock_nested(&dentry->d_inode->i_mutex, I_MUTEX_XATTR);
 		down_write(&dentry->d_inode->i_alloc_sem);
+		reiserfs_write_lock(inode->i_sb);
+
 		err = reiserfs_setattr(dentry, &newattrs);
 		up_write(&dentry->d_inode->i_alloc_sem);
 		mutex_unlock(&dentry->d_inode->i_mutex);