From: Davidlohr Bueso <dave@gnu.org>
Date: Thu, 8 Mar 2012 11:45:54 +0000 (+0100)
Subject: KVM: x86: add paging gcc optimization
X-Git-Url: http://git.mmlx.us/?a=commitdiff_plain;h=c36fc04ef558c95cff46a8c89d2f804f217335f5;p=linux-edison.git

KVM: x86: add paging gcc optimization

Since most guests will have paging enabled for memory management, add likely() optimization
around CR0.PG checks.

Signed-off-by: Davidlohr Bueso <dave@gnu.org>
Signed-off-by: Avi Kivity <avi@redhat.com>
---

diff --git a/arch/x86/kvm/x86.h b/arch/x86/kvm/x86.h
index cb80c293cdd..3d1134ddb88 100644
--- a/arch/x86/kvm/x86.h
+++ b/arch/x86/kvm/x86.h
@@ -64,7 +64,7 @@ static inline int is_pse(struct kvm_vcpu *vcpu)
 
 static inline int is_paging(struct kvm_vcpu *vcpu)
 {
-	return kvm_read_cr0_bits(vcpu, X86_CR0_PG);
+	return likely(kvm_read_cr0_bits(vcpu, X86_CR0_PG));
 }
 
 static inline u32 bit(int bitno)