xfs: semaphore cleanup

Get rid of init_MUTEX[_LOCKED]() and use sema_init() instead.

(Ported to current XFS code by <aelder@sgi.com>.)
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Signed-off-by: NAlex Elder <aelder@sgi.com>

fs/xfs/linux-2.6/xfs_buf.c

@@ -189,7 +189,7 @@ _xfs_buf_initialize(
 	init_completion(&bp->b_iowait);
 	INIT_LIST_HEAD(&bp->b_list);
 	RB_CLEAR_NODE(&bp->b_rbnode);
-	init_MUTEX_LOCKED(&bp->b_sema); /* held, no waiters */
+	sema_init(&bp->b_sema, 0); /* held, no waiters */
 	XB_SET_OWNER(bp);
 	bp->b_target = target;
 	bp->b_file_offset = range_base;