From 1fca251f36fac3fae7d9cf10de69c2c93f6c0000 Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Fri, 17 Feb 2006 13:52:46 -0800 Subject: [PATCH] [PATCH] s390: fix preempt_count of idle thread with cpu hotplug Set preempt_count of idle_thread to zero before switching off cpu. Otherwise the preempt_count will be wrong if the cpu is switched on again since the thread will be reused. Signed-off-by: Heiko Carstens Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/s390/kernel/process.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c index 008c74526fd3..da6fbae8df91 100644 --- a/arch/s390/kernel/process.c +++ b/arch/s390/kernel/process.c @@ -128,8 +128,10 @@ void default_idle(void) __ctl_set_bit(8, 15); #ifdef CONFIG_HOTPLUG_CPU - if (cpu_is_offline(cpu)) + if (cpu_is_offline(cpu)) { + preempt_enable_no_resched(); cpu_die(); + } #endif local_mcck_disable(); -- 2.20.1