From: Heiko Carstens <heiko.carstens@de.ibm.com>
Date: Wed, 30 Apr 2008 11:38:36 +0000 (+0200)
Subject: [S390] smp: Fix locking order.
X-Git-Tag: v2.6.26-rc1~107^2~14
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0b18d318b80a7f350648ca8f7cc00a2f688104cb;p=pandora-kernel.git

[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>
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