Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/linux/umh.h b/include/linux/umh.h
index 5c812ac..0c08de3 100644
--- a/include/linux/umh.h
+++ b/include/linux/umh.h
@@ -44,8 +44,11 @@
 			  int (*init)(struct subprocess_info *info, struct cred *new),
 			  void (*cleanup)(struct subprocess_info *), void *data);
 struct umh_info {
+	const char *cmdline;
 	struct file *pipe_to_umh;
 	struct file *pipe_from_umh;
+	struct list_head list;
+	void (*cleanup)(struct umh_info *info);
 	pid_t pid;
 };
 int fork_usermode_blob(void *data, size_t len, struct umh_info *info);