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[PATCH] s390: fix preempt_count of idle thread with cpu hotplug

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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 <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Heiko Carstens 2006-02-17 13:52:46 -08:00 committed by Linus Torvalds
parent 6d751c43b2
commit 1fca251f36
1 changed files with 3 additions and 1 deletions
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4
arch/s390/kernel/process.c
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@ -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();