xfs: use the "delwri" terminology consistently

And also remove the strange local lock and delwri list pointers in a few
functions.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Alex Elder <aelder@sgi.com>


diff --git a/fs/xfs/xfs_buf.h b/fs/xfs/xfs_buf.h
index 3f543ed..c238266 100644
--- a/fs/xfs/xfs_buf.h
+++ b/fs/xfs/xfs_buf.h
@@ -105,8 +105,8 @@
 
 	/* per device delwri queue */
 	struct task_struct	*bt_task;
-	struct list_head	bt_delwrite_queue;
-	spinlock_t		bt_delwrite_lock;
+	struct list_head	bt_delwri_queue;
+	spinlock_t		bt_delwri_lock;
 	unsigned long		bt_flags;
 
 	/* LRU control structures */