openwrtv4/target/linux/octeon/patches-3.18/160-cmdline-hack.patch

--- a/arch/mips/cavium-octeon/setup.c
+++ b/arch/mips/cavium-octeon/setup.c
@@ -609,6 +609,35 @@ void octeon_user_io_init(void)
 	write_c0_derraddr1(0);
 }
 
+#ifdef CONFIG_IMAGE_CMDLINE_HACK
+extern char __image_cmdline[];
+
+static int __init octeon_use_image_cmdline(void)
+{
+       char *p = __image_cmdline;
+       int replace = 0;
+
+       if (*p == '-') {
+               replace = 1;
+               p++;
+       }
+
+       if (*p == '\0')
+               return 0;
+
+       if (replace) {
+               strlcpy(arcs_cmdline, p, sizeof(arcs_cmdline));
+       } else {
+               strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
+               strlcat(arcs_cmdline, p, sizeof(arcs_cmdline));
+       }
+
+       return 1;
+}
+#else
+static inline int octeon_use_image_cmdline(void) { return 0; }
+#endif
+
 /**
  * Early entry point for arch setup
  */
@@ -798,6 +827,8 @@ void __init prom_init(void)
 		}
 	}
 
+	octeon_use_image_cmdline();
+
 	if (strstr(arcs_cmdline, "console=") == NULL) {
 #ifdef CONFIG_CAVIUM_OCTEON_2ND_KERNEL
 		strcat(arcs_cmdline, " console=ttyS0,115200");