diff -Nur linux-2.6.30.orig/arch/mips/lib/delay.c linux-2.6.30/arch/mips/lib/delay.c
--- linux-2.6.30.orig/arch/mips/lib/delay.c	2009-06-10 05:05:27.000000000 +0200
+++ linux-2.6.30/arch/mips/lib/delay.c	2009-06-12 19:11:07.000000000 +0200
@@ -51,6 +51,6 @@
 {
 	unsigned int lpj = current_cpu_data.udelay_val;
 
-	__delay((us * 0x00000005 * HZ * lpj) >> 32);
+	__delay((ns * 0x00000005 * HZ * lpj) >> 32);
 }
 EXPORT_SYMBOL(__ndelay);