linux-kernel - [PATCH] KVM: x86/i8259: Remove a dead store of irq in a conditional block

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Date:   Tue,  1 Mar 2022 20:02:17 +0800
From:   Like Xu <like.xu.linux@...il.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     kvm@...r.kernel.org, Sean Christopherson <seanjc@...gle.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Joerg Roedel <joro@...tes.org>, linux-kernel@...r.kernel.org
Subject: [PATCH] KVM: x86/i8259: Remove a dead store of irq in a conditional block

From: Like Xu <likexu@...cent.com>

The [clang-analyzer-deadcode.DeadStores] helper reports
that the value stored to 'irq' is never read.

Signed-off-by: Like Xu <likexu@...cent.com>
---
Note: not sure if "irq2 + 8" should be needed for "s->pics[0].irq_base + irq"

 arch/x86/kvm/i8259.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/arch/x86/kvm/i8259.c b/arch/x86/kvm/i8259.c
index be99dc86293d..e1bb6218bb96 100644
--- a/arch/x86/kvm/i8259.c
+++ b/arch/x86/kvm/i8259.c
@@ -252,7 +252,6 @@ int kvm_pic_read_irq(struct kvm *kvm)
 				 */
 				irq2 = 7;
 			intno = s->pics[1].irq_base + irq2;
-			irq = irq2 + 8;
 		} else
 			intno = s->pics[0].irq_base + irq;
 	} else {
-- 
2.35.1