[Patch RFC 24/37] xfs: semaphore cleanup

[Thomas Gleixner]

bp->b_sema claims to be a mutex, but it is a semaphore with non
obvious semantics. Make it a real semaphore.

Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc:  Christoph Hellwig <hch@xxxxxx>
---
 fs/xfs/linux-2.6/xfs_buf.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: linux-2.6-tip/fs/xfs/linux-2.6/xfs_buf.c
===================================================================
--- linux-2.6-tip.orig/fs/xfs/linux-2.6/xfs_buf.c
+++ linux-2.6-tip/fs/xfs/linux-2.6/xfs_buf.c
@@ -263,7 +263,7 @@ _xfs_buf_initialize(
 	init_completion(&bp->b_iowait);
 	INIT_LIST_HEAD(&bp->b_list);
 	INIT_LIST_HEAD(&bp->b_hash_list);
-	init_MUTEX_LOCKED(&bp->b_sema); /* held, no waiters */
+	semaphore_init_locked(&bp->b_sema); /* held, no waiters */
 	XB_SET_OWNER(bp);
 	bp->b_target = target;
 	bp->b_file_offset = range_base;


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