linux-kernel - Re: [PATCH v12 06/11] x86/smpboot: Remove initial

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Date:   Tue, 28 Feb 2023 21:32:55 +0100
From:   Thomas Gleixner <tglx@...utronix.de>
To:     David Woodhouse <dwmw2@...radead.org>,
        Usama Arif <usama.arif@...edance.com>, kim.phillips@....com,
        brgerst@...il.com
Cc:     piotrgorski@...hyos.org, oleksandr@...alenko.name,
        arjan@...ux.intel.com, mingo@...hat.com, bp@...en8.de,
        dave.hansen@...ux.intel.com, hpa@...or.com, x86@...nel.org,
        pbonzini@...hat.com, paulmck@...nel.org,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        rcu@...r.kernel.org, mimoja@...oja.de, hewenliang4@...wei.com,
        thomas.lendacky@....com, seanjc@...gle.com, pmenzel@...gen.mpg.de,
        fam.zheng@...edance.com, punit.agrawal@...edance.com,
        simon.evans@...edance.com, liangma@...ngbit.com
Subject: Re: [PATCH v12 06/11] x86/smpboot: Remove initial_stack on 64-bit

On Tue, Feb 28 2023 at 16:25, David Woodhouse wrote:
> On Tue, 2023-02-28 at 17:13 +0100, Thomas Gleixner wrote:
>> Folks, really.
>
> Also, while those two lines *happen* to be my addition to Brian's
> commit message, I don't know if you knew that.

I knew because I read Brians patches _and_ I know your quick changelog
style by heart.

> Speak to me how you like; you know I'll still love you. But be nicer
> to Brian and Usama.

Hmm. I was not aware that 'Folks, really.' qualifies as not nice
nowadays.

>> > +#endif /* CONFIG_SMP */
>> 
>> Sigh, we should finally make CONFIG_SMP def_bool y ...
>
> Not today :)

Right, but it's overdue nevertheless to adjust with reality :)

>> > +       if (IS_ENABLED(CONFIG_X86_32)) {
>> > +               initial_stack  = idle->thread.sp;
>> > +       } else {
>> > +               smpboot_control = cpu;
>> > +       }
>> 
>> Please remove the pointless brackets.
>
> I pondered that, but they only get added back again in the next patch.
> It just seemed like adding pointless churn.

Fair enough.

Thanks,

        tglx