diff --git a/arch/arm/mach-omap2/omap-wakeupgen.c b/arch/arm/mach-omap2/omap-wakeupgen.c
index f397bd6bd6e30..f436ccb6137b8 100644
--- a/arch/arm/mach-omap2/omap-wakeupgen.c
+++ b/arch/arm/mach-omap2/omap-wakeupgen.c
@@ -320,6 +320,11 @@ static int irq_cpu_hotplug_notify(struct notifier_block *self,
 {
 	unsigned int cpu = (unsigned int)hcpu;
 
+	/*
+	 * Corresponding FROZEN transitions do not have to be handled,
+	 * they are handled by at a higher level
+	 * (drivers/cpuidle/coupled.c).
+	 */
 	switch (action) {
 	case CPU_ONLINE:
 		wakeupgen_irqmask_all(cpu, 0);