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KVM: s390: fast path for shadow gmaps in gmap notifier 

The default kvm gmap notifier doesn't have to handle shadow gmaps.
So let's just directly exit in case we get notified about one.

Acked-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>
This commit is contained in:
David Hildenbrand 2015-04-27 16:29:34 +02:00 committed by Christian Borntraeger
parent 01f719176f
commit 65d0b0d4bc
1 changed files with 2 additions and 0 deletions
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2
arch/s390/kvm/kvm-s390.c
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@ -1986,6 +1986,8 @@ static void kvm_gmap_notifier(struct gmap *gmap, unsigned long start,
unsigned long prefix;
int i;
if (gmap_is_shadow(gmap))
return;
if (start >= 1UL << 31)
/* We are only interested in prefix pages */
return;