linux-kernel - Re: [PATCH] x86: squash lines for simple wrapper functions

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Date:   Fri, 9 Sep 2016 16:40:44 +0200 (CEST)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Ingo Molnar <mingo@...nel.org>
cc:     Masahiro Yamada <yamada.masahiro@...ionext.com>, x86@...nel.org,
        Ingo Molnar <mingo@...hat.com>,
        Toshi Kani <toshi.kani@....com>,
        Denys Vlasenko <dvlasenk@...hat.com>,
        Borislav Petkov <bp@...e.de>,
        Paul Gortmaker <paul.gortmaker@...driver.com>,
        "H. Peter Anvin" <hpa@...or.com>, Nathan Zimmer <nzimmer@....com>,
        linux-kernel@...r.kernel.org, Mike Travis <travis@....com>,
        Daniel J Blueman <daniel@...ascale.com>,
        Dimitri Sivanich <sivanich@....com>,
        Matt Fleming <matt@...eblueprint.co.uk>,
        Hedi Berriche <hedi@....com>,
        Steffen Persvold <sp@...ascale.com>,
        Alex Thorlton <athorlton@....com>,
        Wei Jiangang <weijg.fnst@...fujitsu.com>
Subject: Re: [PATCH] x86: squash lines for simple wrapper functions

On Thu, 8 Sep 2016, Ingo Molnar wrote:
> * Masahiro Yamada <yamada.masahiro@...ionext.com> wrote:
> >  static unsigned long set_apic_id(unsigned int id)
> >  {
> > -	unsigned long x;
> > -
> >  	/* maskout x2apic_extra_bits ? */
> > -	x = id;
> > -	return x;
> > +	return id;
> >  }
> 
> This was clearly left there to document a quirk and as a placeholder for future 
> changes.

Keeping the comment and rewording it to:

	/* CHECKME: Do we need to mask out the xapic extra bits */

should be good enough. The variable dance is not really giving any value.

Thanks,

	tglx