linux-kernel - Re: [PATCH v2] x86/boot/KASLR: Fix unused variable warning

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Message-ID: <CAFH1YnM=wOTpWEsoYeqaazdH3rdY-sG57=hTAwEcagJKLFbQ9g@mail.gmail.com>
Date:   Fri, 10 Jan 2020 16:46:21 +0800
From:   Zhenzhong Duan <zhenzhong.duan@...il.com>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     linux-kernel@...r.kernel.org, x86@...nel.org,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...e.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        Chao Fan <fanc.fnst@...fujitsu.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>
Subject: Re: [PATCH v2] x86/boot/KASLR: Fix unused variable warning

On Fri, Jan 10, 2020 at 5:00 AM Thomas Gleixner <tglx@...utronix.de> wrote:
>
> Zhenzhong Duan <zhenzhong.duan@...il.com> writes:
>
> > Local variable 'i' is referenced only when CONFIG_MEMORY_HOTREMOVE and
> > CONFIG_ACPI are defined, but definition of variable 'i' is out of guard.
> > If any of the two macros is undefined, below warning triggers during
> > build, fix it by moving 'i' in the guard.
> >
> > arch/x86/boot/compressed/kaslr.c:698:6: warning: unused variable ‘i’ [-Wunused-variable]
> >
> > Also use true/false instead of 1/0 for boolean return.
>
> No. This is not the scope of the unused variable issue. This want's to
> be a separate patch.

I'm trying to combine trivial changes into one, so you maintainers
don't mind to pick two trivial patches? :)

Regards
Zhenzhong