[PATCH] cpu/hotplug: Fix state name in takedown_cpu comment

[Brendan Jackman <brendan.jackman@arm.com>]

CPUHP_AP_SCHED_MIGRATE_DYING doesn't exist, it looks like this was
supposed to refer to CPUHP_AP_SCHED_STARTING's teardown callback
i.e. sched_cpu_dying.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Dietmar Eggemann <dietmar.eggemann@arm.com>
Cc: Quentin Perret <quentin.perret@arm.com>
---
 kernel/cpu.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/cpu.c b/kernel/cpu.c
index 04892a82f6ac..944c7efdf092 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -780,8 +780,8 @@ static int takedown_cpu(unsigned int cpu)
 	BUG_ON(cpu_online(cpu));
 
 	/*
-	 * The CPUHP_AP_SCHED_MIGRATE_DYING callback will have removed all
-	 * runnable tasks from the cpu, there's only the idle task left now
+	 * The teardown callback for CPUHP_AP_SCHED_STARTING will have removed
+	 * all runnable tasks from the cpu, there's only the idle task left now
 	 * that the migration thread is done doing the stop_machine thing.
 	 *
 	 * Wait for the stop thread to go away.
-- 
2.14.1