xfs: trivial sparse fixes for the new scrub code

[darrick: fix broken initializer in xfs_scrub_xattr]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>

fs/xfs/scrub/attr.c

@@ -91,7 +91,7 @@ xfs_scrub_xattr_listent(
 	int				valuelen)
 {
 	struct xfs_scrub_xattr		*sx;
-	struct xfs_da_args		args = {0};
+	struct xfs_da_args		args = { NULL };
 	int				error = 0;
 
 	sx = container_of(context, struct xfs_scrub_xattr, context);
@@ -420,7 +420,7 @@ int
 xfs_scrub_xattr(
 	struct xfs_scrub_context	*sc)
 {
-	struct xfs_scrub_xattr		sx = { 0 };
+	struct xfs_scrub_xattr		sx;
 	struct attrlist_cursor_kern	cursor = { 0 };
 	xfs_dablk_t			last_checked = -1U;
 	int				error = 0;

fs/xfs/scrub/bmap.c

@@ -229,7 +229,7 @@ xfs_scrub_bmap(
 	int				whichfork)
 {
 	struct xfs_bmbt_irec		irec;
-	struct xfs_scrub_bmap_info	info = {0};
+	struct xfs_scrub_bmap_info	info = { NULL };
 	struct xfs_mount		*mp = sc->mp;
 	struct xfs_inode		*ip = sc->ip;
 	struct xfs_ifork		*ifp;

fs/xfs/scrub/btree.c

@@ -414,7 +414,7 @@ xfs_scrub_btree(
 	struct xfs_owner_info		*oinfo,
 	void				*private)
 {
-	struct xfs_scrub_btree		bs = {0};
+	struct xfs_scrub_btree		bs = { NULL };
 	union xfs_btree_ptr		ptr;
 	union xfs_btree_ptr		*pp;
 	union xfs_btree_rec		*recp;

fs/xfs/scrub/dir.c

@@ -560,7 +560,7 @@ xfs_scrub_directory_free_bestfree(
 	struct xfs_buf			*dbp;
 	struct xfs_buf			*bp;
 	__be16				*bestp;
-	__be16				best;
+	__u16				best;
 	unsigned int			stale = 0;
 	int				i;
 	int				error;

fs/xfs/scrub/scrub.c

@@ -123,7 +123,7 @@
  * structure state to decide (in broad terms) if scrub/repair are
  * supported by the running kernel.
  */
-int
+static int
 xfs_scrub_probe(
 	struct xfs_scrub_context	*sc)
 {