xfs: minor cleanups of xfs_attr3_rmt_blocks

Clean up the type signature of this function since we don't have
negative attr lengths or block counts.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Andrey Albershteyn <aalbersh@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>

fs/xfs/libxfs/xfs_attr_remote.c

@@ -56,19 +56,19 @@ xfs_attr3_rmt_buf_space(
 	return blocksize;
 }
 
-/*
- * Each contiguous block has a header, so it is not just a simple attribute
- * length to FSB conversion.
- */
+/* Compute number of fsblocks needed to store a remote attr value */
 unsigned int
 xfs_attr3_rmt_blocks(
 	struct xfs_mount	*mp,
 	unsigned int		attrlen)
 {
-	if (xfs_has_crc(mp)) {
-		unsigned int buflen = xfs_attr3_rmt_buf_space(mp);
-		return (attrlen + buflen - 1) / buflen;
-	}
+	/*
+	 * Each contiguous block has a header, so it is not just a simple
+	 * attribute length to FSB conversion.
+	 */
+	if (xfs_has_crc(mp))
+		return howmany(attrlen, xfs_attr3_rmt_buf_space(mp));
+
 	return XFS_B_TO_FSB(mp, attrlen);
 }