diff -uNr linux-2.4.paul/arch/ppc/kernel/setup.c linux/arch/ppc/kernel/setup.c
--- linux-2.4.paul/arch/ppc/kernel/setup.c	Tue Aug  8 07:46:33 2000
+++ linux/arch/ppc/kernel/setup.c	Sat Sep  2 11:26:13 2000
@@ -661,11 +661,13 @@
 	{
 		unsigned long val = simple_strtoul(str, NULL, 0);
 		printk(KERN_INFO "l2cr set to %lx\n", val);
-		_set_L2CR(0);
-		_set_L2CR(val);
+		_set_L2CR(0); 		/* force invalidate by disable cache */
+		_set_L2CR(val);		/* and enable it */
 	}
 }

+__setup("l2cr=", ppc_setup_l2cr);
+
 void __init ppc_init(void)
 {
 	/* clear the progress line */