KVM: Add a might_sleep() annotation to gfn_to_page()

This will help trap accesses to guest memory in atomic context.

Signed-off-by: Avi Kivity <avi@qumranet.com>

diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c
index a6e3165043d174d3d91b5c5cd135ed666b212cdf..453e98e251dafd839d8c151cd21f922b98001a6d 100644 (file)
--- a/drivers/kvm/kvm_main.c
+++ b/drivers/kvm/kvm_main.c
@@ -993,6 +993,8 @@ struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn)
        struct page *page[1];
        int npages;
 
+       might_sleep();
+
        gfn = unalias_gfn(kvm, gfn);
        slot = __gfn_to_memslot(kvm, gfn);
        if (!slot) {