static inline int
xfs_buf_lookup(
	struct xfs_perag	*pag,
	struct xfs_buf_map	*map,
	xfs_buf_flags_t		flags,
	struct xfs_buf		**bpp)
static inline int
xfs_buf_lookup(
	struct xfs_buf_cache	*bch,
	struct xfs_buf_map	*map,
	xfs_buf_flags_t		flags,
	struct xfs_buf		**bpp)