KVM: s390: switch to get_tod_clock() and fix STP sync races

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Nobody except early.c makes use of store_tod_clock() to handle the
cc. So if we would get a cc != 0, we would be in more trouble.

Let's replace all users with get_tod_clock(). Returning a cc
on an ioctl sounded strange either way.

We can now also easily move the get_tod_clock() call into the
preempt_disable() section. This is in fact necessary to make the
STP sync work as expected. Otherwise the host TOD could change
and we would end up with a wrong epoch calculation.

Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>

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David Hildenbrand 2015-09-29 16:27:24 +02:00 • committed by Christian Borntraeger

parent 238293b14d

commit 5a3d883a59

2 changed files with 6 additions and 20 deletions

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18

arch/s390/kvm/kvm-s390.c

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8

arch/s390/kvm/priv.c

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