xfs: remove xfs_wait_on_pages()

It's just a simple wrapper around a VFS function that is only called
by another function in xfs_fs_subr.c. Remove it and call the VFS
function directly.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Andrew Dahl <adahl@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>

fs/xfs/xfs_fs_subr.c

@@ -62,23 +62,9 @@ xfs_flush_pages(
 				last == -1 ? LLONG_MAX : last);
 	if (flags & XBF_ASYNC)
 		return ret;
-	ret2 = xfs_wait_on_pages(ip, first, last);
+	ret2 = -filemap_fdatawait_range(mapping, first,
+				last == -1 ? XFS_ISIZE(ip) - 1 : last);
 	if (!ret)
 		ret = ret2;
 	return ret;
 }
-
-int
-xfs_wait_on_pages(
-	xfs_inode_t	*ip,
-	xfs_off_t	first,
-	xfs_off_t	last)
-{
-	struct address_space *mapping = VFS_I(ip)->i_mapping;
-
-	if (mapping_tagged(mapping, PAGECACHE_TAG_WRITEBACK)) {
-		return -filemap_fdatawait_range(mapping, first,
-					last == -1 ? XFS_ISIZE(ip) - 1 : last);
-	}
-	return 0;
-}

fs/xfs/xfs_vnodeops.h

@@ -52,7 +52,6 @@ int xfs_flushinval_pages(struct xfs_inode *ip, xfs_off_t first,
 		xfs_off_t last, int fiopt);
 int xfs_flush_pages(struct xfs_inode *ip, xfs_off_t first,
 		xfs_off_t last, uint64_t flags, int fiopt);
-int xfs_wait_on_pages(struct xfs_inode *ip, xfs_off_t first, xfs_off_t last);
 
 int xfs_zero_eof(struct xfs_inode *, xfs_off_t, xfs_fsize_t);
 int xfs_free_eofblocks(struct xfs_mount *, struct xfs_inode *, bool);