x86/mce: Fix CPU hotplug and suspend regression related to MCE
Commit 8a25a2fd12
("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>
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parent
96e80a7851
commit
a3301b751b
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@ -2011,7 +2011,7 @@ static __cpuinit int mce_device_create(unsigned int cpu)
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if (!mce_available(&boot_cpu_data))
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return -EIO;
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memset(&dev->kobj, 0, sizeof(struct kobject));
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memset(dev, 0, sizeof(struct device));
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dev->id = cpu;
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dev->bus = &mce_subsys;
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