xfs: kill VN_MAPPED

Only one user, no longer needed.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <david@fromorbit.com>

fs/xfs/xfs_bmap_util.c

@@ -1766,7 +1766,7 @@ xfs_swap_extents(
 	 * vop_read (or write in the case of autogrow) they block on the iolock
 	 * until we have switched the extents.
 	 */
-	if (VN_MAPPED(VFS_I(ip))) {
+	if (mapping_mapped(VFS_I(ip)->i_mapping)) {
 		error = -EBUSY;
 		goto out_unlock;
 	}

fs/xfs/xfs_vnode.h

@@ -34,10 +34,4 @@ struct attrlist_cursor_kern;
 	{ IO_ISDIRECT,	"DIRECT" }, \
 	{ IO_INVIS,	"INVIS"}
 
-/*
- * Some useful predicates.
- */
-#define VN_MAPPED(vp)	mapping_mapped(vp->i_mapping)
-
-
 #endif	/* __XFS_VNODE_H__ */