diff --git a/arch/powerpc/platforms/iseries/lpevents.c b/arch/powerpc/platforms/iseries/lpevents.c
index 0b885300d1d1a9360a32a2418e5d0e9c024c1faf..8ca7b939635574c5079513060ce4d6657cf985f8 100644
--- a/arch/powerpc/platforms/iseries/lpevents.c
+++ b/arch/powerpc/platforms/iseries/lpevents.c
@@ -184,6 +184,8 @@ void setup_hvlpevent_queue(void)
 {
 	void *eventStack;
 
+	spin_lock_init(&hvlpevent_queue.lock);
+
 	/* Allocate a page for the Event Stack. */
 	eventStack = alloc_bootmem_pages(LpEventStackSize);
 	memset(eventStack, 0, LpEventStackSize);