linux-kernel - KVM: Drop unnecessary initialization of "npages" in hva_to_pfn_slow() initialized and assigned, it is used after assignment

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20220819014953.483381-1-kunyu@nfschina.com>
Date:   Fri, 19 Aug 2022 09:49:53 +0800
From:   Li kunyu <kunyu@...china.com>
To:     seanjc@...gle.com, pbonzini@...hat.com
Cc:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Li kunyu <kunyu@...china.com>
Subject: KVM: Drop unnecessary initialization of "npages" in hva_to_pfn_slow() initialized and assigned, it is used after assignment

Used to reduce a mov instruction.

Reviewed-by: Sean Christopherson <seanjc@...gle.com>
Signed-off-by: Li kunyu <kunyu@...china.com>
---
 virt/kvm/kvm_main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 82f2b90718a9..f047799bf19b 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -2516,7 +2516,7 @@ static int hva_to_pfn_slow(unsigned long addr, bool *async, bool write_fault,
 {
 	unsigned int flags = FOLL_HWPOISON;
 	struct page *page;
-	int npages = 0;
+	int npages;
 
 	might_sleep();
 
-- 
2.18.2