1 files changed, 3 insertions, 5 deletions

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 605697e9c4dd..28d693a1ee8f 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -920,6 +920,7 @@ int __kvm_set_memory_region(struct kvm *kvm,
         int r;
         gfn_t base_gfn;
         unsigned long npages;
+        int largepages;
         unsigned long i;
         struct kvm_memory_slot *memslot;
         struct kvm_memory_slot old, new;
@@ -995,11 +996,8 @@ int __kvm_set_memory_region(struct kvm *kvm,
                         new.userspace_addr = 0;
         }
         if (npages && !new.lpage_info) {
-                int largepages = npages / KVM_PAGES_PER_HPAGE;
-                if (npages % KVM_PAGES_PER_HPAGE)
-                        largepages++;
-                if (base_gfn % KVM_PAGES_PER_HPAGE)
-                        largepages++;
+                largepages = 1 + (base_gfn + npages - 1) / KVM_PAGES_PER_HPAGE;
+                largepages -= base_gfn / KVM_PAGES_PER_HPAGE;
 
                 new.lpage_info = vmalloc(largepages * sizeof(*new.lpage_info));