[XFS] kill sys_cred

capable_cred has been unused for a while so we can kill it and sys_cred.
That also means the cred argument to xfs_setattr and xfs_change_file_space
can be removed now.

SGI-PV: 988918

SGI-Modid: xfs-linux-melb:xfs-kern:32412a

Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Tim Shimmin <tes@sgi.com>
Signed-off-by: David Chinner <david@fromorbit.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c
index 1c89011..34a1982 100644
--- a/fs/xfs/xfs_vnodeops.c
+++ b/fs/xfs/xfs_vnodeops.c
@@ -79,8 +79,7 @@
 xfs_setattr(
 	struct xfs_inode	*ip,
 	struct iattr		*iattr,
-	int			flags,
-	cred_t			*credp)
+	int			flags)
 {
 	xfs_mount_t		*mp = ip->i_mount;
 	struct inode		*inode = VFS_I(ip);
@@ -3362,7 +3361,6 @@
 	int		cmd,
 	xfs_flock64_t	*bf,
 	xfs_off_t	offset,
-	cred_t		*credp,
 	int		attr_flags)
 {
 	xfs_mount_t	*mp = ip->i_mount;
@@ -3450,7 +3448,7 @@
 		iattr.ia_valid = ATTR_SIZE;
 		iattr.ia_size = startoffset;
 
-		error = xfs_setattr(ip, &iattr, attr_flags, credp);
+		error = xfs_setattr(ip, &iattr, attr_flags);
 
 		if (error)
 			return error;