linux-kernel - Re: [PATCH 2/2] spi: rpc-if: Remove CONFIG_PM

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Message-ID: <20210104234018.GA19909@amd>
Date:   Tue, 5 Jan 2021 00:40:18 +0100
From:   Pavel Machek <pavel@...x.de>
To:     Mark Brown <broonie@...nel.org>
Cc:     "Lad, Prabhakar" <prabhakar.csengg@...il.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Pavel Machek <pavel@...x.de>,
        Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
        Jiri Kosina <trivial@...nel.org>,
        Sergei Shtylyov <sergei.shtylyov@...il.com>,
        linux-spi <linux-spi@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        Chris Brandt <Chris.Brandt@...esas.com>
Subject: Re: [PATCH 2/2] spi: rpc-if: Remove CONFIG_PM_SLEEP ifdefery

Hi!

> > > >                 .name   = "rpc-if-spi",
> > > > -               .pm     = DEV_PM_OPS,
> > > > +               .pm     = &rpcif_spi_pm_ops,
> 
> > > You're aware rpcif_spi_pm_ops is now always referenced and thus emitted,
> > > increasing kernel size by 92 bytes if CONFIG_PM_SLEEP=n?
> > > This may matter for RZ/A SoCs running from internal SRAM.
> 
> > Hmm didn't realise this would be an issue on RZ/A.
> 
> > Mark, could you please drop this patch from your branch.
> 
> Please send an incremental patch with an appropriate changelog.

Let's fix this properly. I'm pretty sure we have some macros that can
solve this without re-introducing the ifdefs...

(Besides... 92 bytes. How big is kernel these days? 4MB? More? How
much SRAM do you have?)

Best regards,
								Pavel


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