[PATCH] kvm:vmx:code changes in handle_io() to save some CPU cycles.

[Stephen Zhang]

code changes in handle_io() to save some CPU cycles.

Signed-off-by: Stephen Zhang <starzhangzsd@xxxxxxxxx>
---
 arch/x86/kvm/vmx/vmx.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 47b8357..109bcf64 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -4899,15 +4899,14 @@ static int handle_triple_fault(struct kvm_vcpu *vcpu)
 static int handle_io(struct kvm_vcpu *vcpu)
 {
 	unsigned long exit_qualification;
-	int size, in, string;
+	int size, in;
 	unsigned port;
 
 	exit_qualification = vmx_get_exit_qual(vcpu);
-	string = (exit_qualification & 16) != 0;
 
 	++vcpu->stat.io_exits;
 
-	if (string)
+	if (exit_qualification & 16)
 		return kvm_emulate_instruction(vcpu, 0);
 
 	port = exit_qualification >> 16;
-- 
1.8.3.1