Commit 1fca251f authored by Heiko Carstens's avatar Heiko Carstens Committed by Linus Torvalds

[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: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 6d751c43
......@@ -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();
......
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