[S390] smp: Fix locking order.

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On some smp sysfs store attributes get_online_cpus() may block on
cpu_hotplug.lock, but we hold already smp_cpu_state_mutex. Since the
locking order on cpu hotplug via arch_update_cpu_topology is inverse
this might lead to deadlocks.
So make sure locking order is always the same.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

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Heiko Carstens 2008-04-30 13:38:36 +02:00 • committed by Martin Schwidefsky

parent f291e17227

commit 0b18d318b8

1 changed files with 6 additions and 6 deletions

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arch/s390/kernel/smp.c

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