[ARM] Spinlock initializer cleanup

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/kernel/time.c b/arch/arm/kernel/time.c
index d0540e4..1533d3e 100644
--- a/arch/arm/kernel/time.c
+++ b/arch/arm/kernel/time.c
@@ -512,7 +512,7 @@
 
 #ifdef CONFIG_NO_IDLE_HZ
 	if (system_timer->dyn_tick)
-		system_timer->dyn_tick->lock = SPIN_LOCK_UNLOCKED;
+		spin_lock_init(&system_timer->dyn_tick->lock);
 #endif
 }