From 26a6dcc7134b7f45e0058cd735148afd2715f67a Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 29 May 2018 19:05:25 +0200 Subject: [PATCH] cpu/hotplug: Make bringup/teardown of smp threads symmetric commit c4de65696d865c225fda3b9913b31284ea65ea96 upstream The asymmetry caused a warning to trigger if the bootup was stopped in state CPUHP_AP_ONLINE_IDLE. The warning no longer triggers as kthread_park() can now be invoked on already or still parked threads. But there is still no reason to have this be asymmetric. Signed-off-by: Thomas Gleixner Reviewed-by: Konrad Rzeszutek Wilk Acked-by: Ingo Molnar Signed-off-by: Greg Kroah-Hartman --- kernel/cpu.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/kernel/cpu.c b/kernel/cpu.c index d6affe6..ac08cfb 100644 --- a/kernel/cpu.c +++ b/kernel/cpu.c @@ -758,7 +758,6 @@ static int takedown_cpu(unsigned int cpu) /* Park the smpboot threads */ kthread_park(per_cpu_ptr(&cpuhp_state, cpu)->thread); - smpboot_park_threads(cpu); /* * Prevent irq alloc/free while the dying cpu reorganizes the @@ -1344,7 +1343,7 @@ static struct cpuhp_step cpuhp_ap_states[] = { [CPUHP_AP_SMPBOOT_THREADS] = { .name = "smpboot/threads:online", .startup.single = smpboot_unpark_threads, - .teardown.single = NULL, + .teardown.single = smpboot_park_threads, }, [CPUHP_AP_IRQ_AFFINITY_ONLINE] = { .name = "irq/affinity:online", -- 2.7.4