| commit | a3301b751b19f0efbafddc4034f8e7ce6bf3007b | |
| author | Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> | |
| Sat, 14 Jan 2012 02:41:31 +0000 (14 08:11 +0530) | ||
| committer | Linus Torvalds <torvalds@linux-foundation.org> | |
| Sat, 14 Jan 2012 03:11:35 +0000 (13 19:11 -0800) | ||
| tree | 1b94ed9c9ecf887c53bb416d5e7b59694aa353f6 | treesnapshot (tar.gz zip) |
| parent | 96e80a7851b44f3decaac0625665cd64e550b71d | commitdiff |
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>
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>
| arch/x86/kernel/cpu/mcheck/mce.c | diffblobblamehistory |