powerpc: Fix failure to shutdown with CPU hotplug

I tracked down the shutdown regression to CPUs not dying
when being shut down during power-off. This turns out to
be due to the system_state being SYSTEM_POWER_OFF, which
this code doesn't take as a valid state for shutting off
CPUs in.

This has never made sense to me, but when I added hotplug
code to implement hibernate I only "made it work" and did
not question the need to check the system_state. Thomas
Gleixner helped me dig, but the only thing we found is
that it was added with the original commit that added CPU
hotplug support.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Acked-by: Joel Schopp <jschopp@austin.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Johannes Berg 2008-09-24 22:56:25 +00:00 committed by Benjamin Herrenschmidt
parent ad611045ce
commit 61e9916eba
1 changed files with 1 additions and 5 deletions

View File

@ -34,11 +34,7 @@
#include <asm/smp.h>
#ifdef CONFIG_HOTPLUG_CPU
/* this is used for software suspend, and that shuts down
* CPUs even while the system is still booting... */
#define cpu_should_die() (cpu_is_offline(smp_processor_id()) && \
(system_state == SYSTEM_RUNNING \
|| system_state == SYSTEM_BOOTING))
#define cpu_should_die() cpu_is_offline(smp_processor_id())
#else
#define cpu_should_die() 0
#endif