[PATCH] ARM: OMAP: wakeupgen: Add comment for unhandled FROZEN transitions

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FROZEN hotplug notifiers are not handled and do not have to be. Insert
a comment to remember that the lack of the FROZEN transitions is no
accident.

Cc: Tony Lindgren <tony@xxxxxxxxxxx>
Cc: Santosh Shilimkar <ssantosh@xxxxxxxxxx>
Cc: linux-omap@xxxxxxxxxxxxxxx
Signed-off-by: Anna-Maria Gleixner <anna-maria@xxxxxxxxxxxxx>
---
 arch/arm/mach-omap2/omap-wakeupgen.c |    5 +++++
 1 file changed, 5 insertions(+)

--- 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
 {
 	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);
--
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