tomoyo_close_control: don't bother with return value

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

security/tomoyo/common.c

@@ -2681,10 +2681,8 @@ ssize_t tomoyo_write_control(struct tomoyo_io_buffer *head,
  * tomoyo_close_control - close() for /sys/kernel/security/tomoyo/ interface.
  *
  * @head: Pointer to "struct tomoyo_io_buffer".
- *
- * Returns 0.
  */
-int tomoyo_close_control(struct tomoyo_io_buffer *head)
+void tomoyo_close_control(struct tomoyo_io_buffer *head)
 {
 	/*
 	 * If the file is /sys/kernel/security/tomoyo/query , decrement the
@@ -2694,7 +2692,6 @@ int tomoyo_close_control(struct tomoyo_io_buffer *head)
 	    atomic_dec_and_test(&tomoyo_query_observers))
 		wake_up_all(&tomoyo_answer_wait);
 	tomoyo_notify_gc(head, false);
-	return 0;
 }
 
 /**

security/tomoyo/common.h

@@ -958,7 +958,7 @@ const struct tomoyo_path_info *tomoyo_path_matches_group
 (const struct tomoyo_path_info *pathname, const struct tomoyo_group *group);
 int tomoyo_check_open_permission(struct tomoyo_domain_info *domain,
 				 struct path *path, const int flag);
-int tomoyo_close_control(struct tomoyo_io_buffer *head);
+void tomoyo_close_control(struct tomoyo_io_buffer *head);
 int tomoyo_env_perm(struct tomoyo_request_info *r, const char *env);
 int tomoyo_execute_permission(struct tomoyo_request_info *r,
 			      const struct tomoyo_path_info *filename);

security/tomoyo/securityfs_if.c

@@ -143,14 +143,13 @@ static int tomoyo_open(struct inode *inode, struct file *file)
 /**
  * tomoyo_release - close() for /sys/kernel/security/tomoyo/ interface.
  *
- * @inode: Pointer to "struct inode".
  * @file:  Pointer to "struct file".
  *
- * Returns 0 on success, negative value otherwise.
  */
 static int tomoyo_release(struct inode *inode, struct file *file)
 {
-	return tomoyo_close_control(file->private_data);
+	tomoyo_close_control(file->private_data);
+	return 0;
 }
 
 /**