linux-kernel - Re: [PATCH] kernel/sched/core.c: Avoid unused variable on non-SMP configs

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Message-ID: <CAKfTPtCJhPS0tuVhsLgB0Z-=5Vr5KvfU9tJ7E0MEdFJBVxt=5w@mail.gmail.com>
Date:   Mon, 10 Sep 2018 09:00:30 +0200
From:   Vincent Guittot <vincent.guittot@...aro.org>
To:     miguel.ojeda.sandonis@...il.com
Cc:     Borislav Petkov <bp@...en8.de>, Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] kernel/sched/core.c: Avoid unused variable on non-SMP configs

On Sun, 9 Sep 2018 at 19:00, Miguel Ojeda
<miguel.ojeda.sandonis@...il.com> wrote:
>
> On Sun, Sep 9, 2018 at 6:45 PM, Borislav Petkov <bp@...en8.de> wrote:
> > On Sun, Sep 09, 2018 at 06:36:01PM +0200, Miguel Ojeda wrote:
> >> No, you get a different warning depending on whether you have enabled
> >> CONFIG_PARAVIRT_TIME_ACCOUNTING or CONFIG_IRQ_TIME_ACCOUNTING.
> >
> > Ok.
> >
> > Still, adding __maybe_unused to both (or writing it before the name,
> > whatever works!) and dropping the ifdeffery is still better for
> > readability's sake than having more ifdeffery, IMO.
>
> Agreed, it is quite confusing already. I tried to keep the style of
> the code, but Ingo/Peter might prefer the cleanup. Let's see...

FYI, another patch has already been sent for this warning
https://lkml.org/lkml/2018/8/10/22


>
> Cheers,
> Miguel