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x86: unify x86_32 and x86_64 play_dead into one function

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Add the new play_dead into smpboot.c, as it fits more cleanly in there
alongside other CONFIG_HOTPLUG functions.

Separate out the common code into its own function.

Signed-off-by: Alex Nixon <alex.nixon@citrix.com>
Acked-by: Jeremy Fitzhardinge <jeremy@goop.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Alex Nixon 2008-08-22 11:52:13 +01:00 • committed by Ingo Molnar
parent 3790025863
commit a21f5d88c1
4 changed files with 30 additions and 55 deletions
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29
arch/x86/kernel/smpboot.c
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@ -1402,6 +1402,29 @@ void native_cpu_die(unsigned int cpu)
}
printk(KERN_ERR "CPU %u didn't die...\n", cpu);
}
void play_dead_common(void)
{
idle_task_exit();
reset_lazy_tlbstate();
irq_ctx_exit(raw_smp_processor_id());
mb();
/* Ack it */
__get_cpu_var(cpu_state) = CPU_DEAD;
/*
* With physical CPU hotplug, we should halt the cpu
*/
local_irq_disable();
}
void native_play_dead(void)
{
play_dead_common();
wbinvd_halt();
}
#else /* ... !CONFIG_HOTPLUG_CPU */
int native_cpu_disable(void)
{
@ -1413,4 +1436,10 @@ void native_cpu_die(unsigned int cpu)
/* We said "no" in __cpu_disable */
BUG();
}
void native_play_dead(void)
{
BUG();
}
#endif