constify chmod_common/security_path_chmod

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/security/tomoyo/tomoyo.c b/security/tomoyo/tomoyo.c
index c1177f8..e48d0a4 100644
--- a/security/tomoyo/tomoyo.c
+++ b/security/tomoyo/tomoyo.c
@@ -351,7 +351,7 @@
  *
  * Returns 0 on success, negative value otherwise.
  */
-static int tomoyo_path_chmod(struct path *path, umode_t mode)
+static int tomoyo_path_chmod(const struct path *path, umode_t mode)
 {
 	return tomoyo_path_number_perm(TOMOYO_TYPE_CHMOD, path,
 				       mode & S_IALLUGO);