From 65d0b0d4bcc67b596d8e7286c3bebf24c59ade6a Mon Sep 17 00:00:00 2001 From: David Hildenbrand Date: Mon, 27 Apr 2015 16:29:34 +0200 Subject: [PATCH] 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 Signed-off-by: David Hildenbrand Signed-off-by: Christian Borntraeger --- arch/s390/kvm/kvm-s390.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 9dd52980605c..45a8316ba1eb 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -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;