Commit 1fca251f authored Feb 17, 2006 by Heiko Carstens Committed by Linus Torvalds Feb 17, 2006

[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 <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

parent 6d751c43

arch/s390/kernel/process.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -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();