[PATCH] NFSv4: unbalanced BKL in nfs_atomic_lookup()

Added missing unlock_kernel() to NFSv4 atomic lookup.

Signed-off-by: Steve Dickson <steved@redhat.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

fs/nfs/dir.c

@@ -939,6 +939,7 @@ static struct dentry *nfs_atomic_lookup(struct inode *dir, struct dentry *dentry
 	error = nfs_revalidate_inode(NFS_SERVER(dir), dir);
 	if (error < 0) {
 		res = ERR_PTR(error);
+		unlock_kernel();
 		goto out;
 	}