xfs: convert DM ops to use unsigned char names

dmops uses a signed char for it's namespace event. To be consistent
with the rest of the code, convert them to unsigned char for the
namespace string.
Signed-off-by: Dave Chinner <david@fromorbit.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>

fs/xfs/xfs_mount.h

@@ -78,7 +78,8 @@ typedef int	(*xfs_send_destroy_t)(struct xfs_inode *, dm_right_t);
 typedef int	(*xfs_send_namesp_t)(dm_eventtype_t, struct xfs_mount *,
 			struct xfs_inode *, dm_right_t,
 			struct xfs_inode *, dm_right_t,
-			const char *, const char *, mode_t, int, int);
+			const unsigned char *, const unsigned char *,
+			mode_t, int, int);
 typedef int	(*xfs_send_mount_t)(struct xfs_mount *, dm_right_t,
 			char *, char *);
 typedef void	(*xfs_send_unmount_t)(struct xfs_mount *, struct xfs_inode *,

fs/xfs/xfs_vnodeops.c

@@ -2199,7 +2199,8 @@ xfs_symlink(
 	if (DM_EVENT_ENABLED(dp, DM_EVENT_SYMLINK)) {
 		error = XFS_SEND_NAMESP(mp, DM_EVENT_SYMLINK, dp,
 					DM_RIGHT_NULL, NULL, DM_RIGHT_NULL,
-					link_name->name, target_path, 0, 0, 0);
+					link_name->name,
+					(unsigned char *)target_path, 0, 0, 0);
 		if (error)
 			return error;
 	}
@@ -2395,7 +2396,8 @@ xfs_symlink(
 					dp, DM_RIGHT_NULL,
 					error ? NULL : ip,
 					DM_RIGHT_NULL, link_name->name,
-					target_path, 0, error, 0);
+					(unsigned char *)target_path,
+					0, error, 0);
 	}
 
 	if (!error)