[PATCH] KVM: fix compile warning

Xiao Guangrong
2010-07-26T05:47:23Z

Stephen Rothwell wrote:
> Hi all,
>
> After merging the kvm tree, today's linux-next build (x86_64
> allmodconfig) produced this warning:
>
> arch/x86/kvm/mmu.c: In function 'kvm_mmu_pte_write':
> arch/x86/kvm/mmu.c:2908: warning: suggest parentheses around operand of '!' or change '&' to '&&' or '!' to '~'
>
> Introduced by commit af8720393c71a8f81ade71c404798d80c68c5d73 ("KVM: MMU:
> add missing reserved bits check in speculative path").

Hi Stephen,

Thanks for your report, this patch can fix it.

Subject: [PATCH] KVM: fix compile warning

Fix:
arch/x86/kvm/mmu.c: In function 'kvm_mmu_pte_write':
arch/x86/kvm/mmu.c:2908: warning: suggest parentheses around operand of '!' or change '&' to '&&' or '!' to '~'

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
---
arch/x86/kvm/mmu.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 1a8f43f..0dcc95e 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -2904,8 +2904,8 @@ void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
entry = *spte;
mmu_pte_write_zap_pte(vcpu, sp, spte);
if (gentry &&
- !(sp->role.word ^ vcpu->arch.mmu.base_role.word)
- & mask.word)
+ !((sp->role.word ^ vcpu->arch.mmu.base_role.word)
+ & mask.word))
mmu_pte_write_new_pte(vcpu, sp, spte, &gentry);
if (!remote_flush && need_remote_flush(entry, *spte))
remote_flush = true;
--
1.6.5.2