linux-kernel - Re: [PATCH -next] KVM: x86: remove set but not used variable 'called'

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Message-ID: <87imnggidr.fsf@vitty.brq.redhat.com>
Date:   Tue, 19 Nov 2019 13:28:32 +0100
From:   Vitaly Kuznetsov <vkuznets@...hat.com>
To:     Dan Carpenter <dan.carpenter@...cle.com>
Cc:     Mao Wenan <maowenan@...wei.com>, pbonzini@...hat.com,
        rkrcmar@...hat.com, sean.j.christopherson@...el.com,
        wanpengli@...cent.com, jmattson@...gle.com, joro@...tes.org,
        tglx@...utronix.de, mingo@...hat.com, bp@...en8.de, hpa@...or.com,
        kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org
Subject: Re: [PATCH -next] KVM: x86: remove set but not used variable 'called'

Dan Carpenter <dan.carpenter@...cle.com> writes:

> On Tue, Nov 19, 2019 at 12:58:54PM +0100, Vitaly Kuznetsov wrote:
>> Mao Wenan <maowenan@...wei.com> writes:
>> 
>> > Fixes gcc '-Wunused-but-set-variable' warning:
>> >
>> > arch/x86/kvm/x86.c: In function kvm_make_scan_ioapic_request_mask:
>> > arch/x86/kvm/x86.c:7911:7: warning: variable called set but not
>> > used [-Wunused-but-set-variable]
>> >
>> > It is not used since commit 7ee30bc132c6 ("KVM: x86: deliver KVM
>> > IOAPIC scan request to target vCPUs")
>> 
>> Better expressed as 
>> 
>> Fixes: 7ee30bc132c6 ("KVM: x86: deliver KVM IOAPIC scan request to target vCPUs")
>> 
>
> There is sort of a debate about this whether the Fixes tag should be
> used if it's only a cleanup.
>

I have to admit I'm involved in doing backporting sometimes and I really
appreciate Fixes: tags. Just so you know on which side of the debate I
am :-)

-- 
Vitaly