xfs: make xfs_buf_get return an error code

Convert xfs_buf_get() to return numeric error codes like most
everywhere else in xfs.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>

1 files changed, 4 insertions, 8 deletions

diff --git a/fs/xfs/xfs_buf.h b/fs/xfs/xfs_buf.h
index f58147354b02..c3aa4e322243 100644
--- a/fs/xfs/xfs_buf.h
+++ b/fs/xfs/xfs_buf.h
@@ -201,20 +201,16 @@ void xfs_buf_readahead_map(struct xfs_buftarg *target,
 			       struct xfs_buf_map *map, int nmaps,
 			       const struct xfs_buf_ops *ops);
 
-static inline struct xfs_buf *
+static inline int
 xfs_buf_get(
 	struct xfs_buftarg	*target,
 	xfs_daddr_t		blkno,
-	size_t			numblks)
+	size_t			numblks,
+	struct xfs_buf		**bpp)
 {
-	struct xfs_buf		*bp;
-	int			error;
 	DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
 
-	error = xfs_buf_get_map(target, &map, 1, 0, &bp);
-	if (error)
-		return NULL;
-	return bp;
+	return xfs_buf_get_map(target, &map, 1, 0, bpp);
 }
 
 static inline struct xfs_buf *