fix:
 arch/x86/kvm/x86.c: In function ‘handle_emulation_failure’:
 arch/x86/kvm/x86.c:3844: warning: unused variable ‘ctxt’
Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
 
 static int handle_emulation_failure(struct kvm_vcpu *vcpu)
 {
-       struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt;
-
        ++vcpu->stat.insn_emulation_fail;
        trace_kvm_emulate_insn_failed(vcpu);
        vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;