ceph: clean up ceph.dir.pin vxattr name sizeof()

.name_size should use the same string as .name.
Signed-off-by: David Disseldorp <ddiss@suse.de>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

fs/ceph/xattr.c

@@ -327,7 +327,7 @@ static struct ceph_vxattr ceph_dir_vxattrs[] = {
 	XATTR_RSTAT_FIELD(dir, rctime),
 	{
 		.name = "ceph.dir.pin",
-		.name_size = sizeof("ceph.dir_pin"),
+		.name_size = sizeof("ceph.dir.pin"),
 		.getxattr_cb = ceph_vxattrcb_dir_pin,
 		.exists_cb = ceph_vxattrcb_dir_pin_exists,
 		.flags = VXATTR_FLAG_HIDDEN,