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[S390] smp: Fix locking order.
authorHeiko Carstens <heiko.carstens@de.ibm.com>
Wed, 30 Apr 2008 11:38:36 +0000 (13:38 +0200)
committerMartin Schwidefsky <schwidefsky@de.ibm.com>
Wed, 30 Apr 2008 11:38:44 +0000 (13:38 +0200)
commit0b18d318b80a7f350648ca8f7cc00a2f688104cb
tree7a5346faefb67b24f05c00691ca170a6805b0921tree | snapshot
parentf291e17227cf30432ca7c402220f62e6924dd97dcommit | diff
[S390] smp: Fix locking order.

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>
arch/s390/kernel/smp.c diff | blob | history
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