--- zzzz-none-000/linux-4.4.60/arch/mips/kernel/prom.c	2017-04-08 07:53:53.000000000 +0000
+++ scorpion-7490-727/linux-4.4.60/arch/mips/kernel/prom.c	2021-02-04 17:41:59.000000000 +0000
@@ -51,6 +51,10 @@
 
 void __init __dt_setup_arch(void *bph)
 {
+	if (boot_command_line[0] == '\0')
+		strlcpy(boot_command_line, arcs_cmdline,
+			COMMAND_LINE_SIZE);
+
 	if (!early_init_dt_scan(bph))
 		return;