tree 1b94ed9c9ecf887c53bb416d5e7b59694aa353f6
parent 96e80a7851b44f3decaac0625665cd64e550b71d
author Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> 1326508891 +0530
committer Linus Torvalds <torvalds@linux-foundation.org> 1326510695 -0800

x86/mce: Fix CPU hotplug and suspend regression related to MCE

Commit 8a25a2fd126c ("cpu: convert 'cpu' and 'machinecheck' sysdev_class
to a regular subsystem") changed how things are dealt with in the MCE
subsystem.  Some of the things that got broken due to this are CPU
hotplug and suspend/hibernate.

MCE uses per_cpu allocations of struct device.  So, when a CPU goes
offline and comes back online, in order to ensure that we start from a
clean slate with respect to the MCE subsystem, zero out the entire
per_cpu device structure to 0 before using it.

Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>