From: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Date: Fri, 4 Jun 2010 14:02:35 +0000 (+0800)
Subject: KVM: MMU: fix compile warning in kvm_send_hwpoison_signal()
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=95b4d7d4c71e5ec2bbfc7f657e2f33842998acd6;p=users%2Fdwmw2%2Flinux.git

KVM: MMU: fix compile warning in kvm_send_hwpoison_signal()

fix:

arch/x86/kvm/mmu.c: In function ‘kvm_send_hwpoison_signal’:
arch/x86/kvm/mmu.c:2051: warning: ignoring return value of ‘copy_from_user’, declared with attribute warn_unused_resul

Reported-by: Jan Kiszka <jan.kiszka@web.de>
Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 0e351060bc890..7c3e09d5d85ab 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -2049,7 +2049,7 @@ static void kvm_send_hwpoison_signal(struct kvm *kvm, gfn_t gfn)
 
 	/* Touch the page, so send SIGBUS */
 	hva = (void __user *)gfn_to_hva(kvm, gfn);
-	(void)copy_from_user(buf, hva, 1);
+	r = copy_from_user(buf, hva, 1);
 }
 
 static int kvm_handle_bad_page(struct kvm *kvm, gfn_t gfn, pfn_t pfn)