KVM: Add mini-API for vcpu->requests

Makes it a little more readable and hackable.

Signed-off-by: Avi Kivity <avi@redhat.com>
diff --git a/arch/x86/kvm/timer.c b/arch/x86/kvm/timer.c
index 564548f..e16a0db 100644
--- a/arch/x86/kvm/timer.c
+++ b/arch/x86/kvm/timer.c
@@ -32,7 +32,7 @@
 	if (ktimer->reinject || !atomic_read(&ktimer->pending)) {
 		atomic_inc(&ktimer->pending);
 		/* FIXME: this code should not know anything about vcpus */
-		set_bit(KVM_REQ_PENDING_TIMER, &vcpu->requests);
+		kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu);
 	}
 
 	if (waitqueue_active(q))