diff --git a/arch/x86/kernel/io_apic_64.c b/arch/x86/kernel/io_apic_64.c
index 6e383e126db27766b6e1323d523d8d34bbdc9b39..616c53afb711dd0b594273f5189c502610df1af7 100644
--- a/arch/x86/kernel/io_apic_64.c
+++ b/arch/x86/kernel/io_apic_64.c
@@ -2315,7 +2315,6 @@ static struct resource * __init ioapic_setup_resources(void)
 	res = (void *)mem;
 
 	if (mem != NULL) {
-		memset(mem, 0, n);
 		mem += sizeof(struct resource) * nr_ioapics;
 
 		for (i = 0; i < nr_ioapics; i++) {