Index: linux-2.6.25.4/arch/mips/kernel/head.S
===================================================================
--- linux-2.6.25.4.orig/arch/mips/kernel/head.S
+++ linux-2.6.25.4/arch/mips/kernel/head.S
@@ -126,7 +126,12 @@
 	/*
 	 * Reserved space for exception handlers.
 	 * Necessary for machines which link their kernels at KSEG0.
+	 * Use as temporary storage for the kernel command line, so that it
+	 * can be updated easily without having to relink the kernel.
 	 */
+
+EXPORT(_image_cmdline)
+	.ascii "CMDLINE:"
 	.fill	0x400
 #endif