linux-kernel - [PATCH 3.10 022/319] MIPS: KVM: Fix unused variable build warning

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Date:   Sun,  5 Feb 2017 20:09:26 +0100
From:   Willy Tarreau <w@....eu>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        linux@...ck-us.net
Cc:     Nicholas Mc Guire <hofrat@...dl.org>,
        Gleb Natapov <gleb@...nel.org>,
        Paolo Bonzini <pbonzini@...hat.com>,
        James Hogan <james.hogan@...tec.com>, kvm@...r.kernel.org,
        linux-mips@...ux-mips.org, Ralf Baechle <ralf@...ux-mips.org>,
        Willy Tarreau <w@....eu>
Subject: [PATCH 3.10 022/319] MIPS: KVM: Fix unused variable build warning

From: Nicholas Mc Guire <hofrat@...dl.org>

commit 5f508c43a7648baa892528922402f1e13f258bd4 upstream.

As kvm_mips_complete_mmio_load() did not yet modify PC at this point
as James Hogans <james.hogan@...tec.com> explained the curr_pc variable
and the comments along with it can be dropped.

Signed-off-by: Nicholas Mc Guire <hofrat@...dl.org>
Link: http://lkml.org/lkml/2015/5/8/422
Cc: Gleb Natapov <gleb@...nel.org>
Cc: Paolo Bonzini <pbonzini@...hat.com>
Cc: James Hogan <james.hogan@...tec.com>
Cc: kvm@...r.kernel.org
Cc: linux-mips@...ux-mips.org
Cc: linux-kernel@...r.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/9993/
Signed-off-by: Ralf Baechle <ralf@...ux-mips.org>
[james.hogan@...tec.com: Backport to 3.10..3.16]
Signed-off-by: James Hogan <james.hogan@...tec.com>
Signed-off-by: Willy Tarreau <w@....eu>
---
 arch/mips/kvm/kvm_mips_emul.c | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/arch/mips/kvm/kvm_mips_emul.c b/arch/mips/kvm/kvm_mips_emul.c
index 9f76438..5c2d70b 100644
--- a/arch/mips/kvm/kvm_mips_emul.c
+++ b/arch/mips/kvm/kvm_mips_emul.c
@@ -1610,7 +1610,6 @@ kvm_mips_complete_mmio_load(struct kvm_vcpu *vcpu, struct kvm_run *run)
 {
 	unsigned long *gpr = &vcpu->arch.gprs[vcpu->arch.io_gpr];
 	enum emulation_result er = EMULATE_DONE;
-	unsigned long curr_pc;
 
 	if (run->mmio.len > sizeof(*gpr)) {
 		printk("Bad MMIO length: %d", run->mmio.len);
@@ -1618,11 +1617,6 @@ kvm_mips_complete_mmio_load(struct kvm_vcpu *vcpu, struct kvm_run *run)
 		goto done;
 	}
 
-	/*
-	 * Update PC and hold onto current PC in case there is
-	 * an error and we want to rollback the PC
-	 */
-	curr_pc = vcpu->arch.pc;
 	er = update_pc(vcpu, vcpu->arch.pending_load_cause);
 	if (er == EMULATE_FAIL)
 		return er;
-- 
2.8.0.rc2.1.gbe9624a