xfs: convert dirnameops to unsigned char names

To be consistent across the codebase, convert the dirnameops to pass
the directory names by unsigned char strings.

Signed-off-by: Dave Chinner <david@fromorbit.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
diff --git a/fs/xfs/xfs_dir2.c b/fs/xfs/xfs_dir2.c
index 93634a7..c21c527 100644
--- a/fs/xfs/xfs_dir2.c
+++ b/fs/xfs/xfs_dir2.c
@@ -66,8 +66,8 @@
 STATIC enum xfs_dacmp
 xfs_ascii_ci_compname(
 	struct xfs_da_args *args,
-	const char	*name,
-	int 		len)
+	const unsigned char *name,
+	int		len)
 {
 	enum xfs_dacmp	result;
 	int		i;