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[S390] Force PSW restart on online CPU

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PSW restart can be triggered on offline CPUs. If this happens, currently
the PSW restart code fails, because functions like smp_processor_id()
do not work on offline CPUs. This patch fixes this as follows:

If PSW restart is triggered on an offline CPU, the PSW restart (sigp restart)
is done a second time on another CPU that is online and the old CPU is
stopped afterwards.

Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Michael Holzheu
2011-10-30 15:16:38 +01:00
committed by Martin Schwidefsky
parent d3bf37955d
commit 1943f53c9c
3 changed files with 29 additions and 0 deletions
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arch/s390/kernel/ipl.c
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@@ -1738,6 +1738,7 @@ static struct kobj_attribute on_restart_attr =
void do_restart(void)
{
smp_restart_with_online_cpu();
smp_send_stop();
on_restart_trigger.action->fn(&on_restart_trigger);
stop_run(&on_restart_trigger);