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/vmx.c b/arch/x86/kvm/vmx.c
index 345a354..661c6e1 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -899,7 +899,7 @@
 		unsigned long sysenter_esp;
 
 		kvm_migrate_timers(vcpu);
-		set_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests);
+		kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
 		local_irq_disable();
 		list_add(&vmx->local_vcpus_link,
 			 &per_cpu(vcpus_on_cpu, cpu));