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Date:   Sat, 23 Dec 2017 14:48:31 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Yisheng Xie <xieyisheng1@...wei.com>
Cc:     linux-kernel@...r.kernel.org, ysxie@...mail.com,
        ulf.hansson@...aro.org, linux-mmc@...r.kernel.org,
        boris.brezillon@...e-electrons.com, richard@....at,
        marek.vasut@...il.com, cyrille.pitchen@...ev4u.fr,
        linux-mtd@...ts.infradead.org, alsa-devel@...a-project.org,
        wim@...ana.be, linux@...ck-us.net, linux-watchdog@...r.kernel.org,
        b.zolnierkie@...sung.com, linux-fbdev@...r.kernel.org,
        linus.walleij@...aro.org, linux-gpio@...r.kernel.org,
        ralf@...ux-mips.org, linux-mips@...ux-mips.org,
        lgirdwood@...il.com, broonie@...nel.org, tglx@...utronix.de,
        jason@...edaemon.net, marc.zyngier@....com, arnd@...db.de,
        andriy.shevchenko@...ux.intel.com,
        industrypack-devel@...ts.sourceforge.net, wg@...ndegger.com,
        mkl@...gutronix.de, linux-can@...r.kernel.org, mchehab@...nel.org,
        linux-media@...r.kernel.org, a.zummo@...ertech.it,
        alexandre.belloni@...e-electrons.com, linux-rtc@...r.kernel.org,
        daniel.vetter@...el.com, jani.nikula@...ux.intel.com,
        seanpaul@...omium.org, airlied@...ux.ie,
        dri-devel@...ts.freedesktop.org, kvalo@...eaurora.org,
        linux-wireless@...r.kernel.org, linux-spi@...r.kernel.org,
        tj@...nel.org, linux-ide@...r.kernel.org, bhelgaas@...gle.com,
        linux-pci@...r.kernel.org, devel@...verdev.osuosl.org,
        dvhart@...radead.org, andy@...radead.org,
        platform-driver-x86@...r.kernel.org, jakub.kicinski@...ronome.com,
        davem@...emloft.net, nios2-dev@...ts.rocketboards.org,
        netdev@...r.kernel.org, vinod.koul@...el.com,
        dan.j.williams@...el.com, dmaengine@...r.kernel.org,
        jslaby@...e.com
Subject: Re: [PATCH v3 00/27] kill devm_ioremap_nocache

On Sat, Dec 23, 2017 at 06:55:25PM +0800, Yisheng Xie wrote:
> Hi all,
> 
> When I tried to use devm_ioremap function and review related code, I found
> devm_ioremap and devm_ioremap_nocache is almost the same with each other,
> except one use ioremap while the other use ioremap_nocache.

For all arches?  Really?  Look at MIPS, and x86, they have different
functions.

> While ioremap's
> default function is ioremap_nocache, so devm_ioremap_nocache also have the
> same function with devm_ioremap, which can just be killed to reduce the size
> of devres.o(from 20304 bytes to 18992 bytes in my compile environment).
> 
> I have posted two versions, which use macro instead of function for
> devm_ioremap_nocache[1] or devm_ioremap[2]. And Greg suggest me to kill
> devm_ioremap_nocache for no need to keep a macro around for the duplicate
> thing. So here comes v3 and please help to review.

I don't think this can be done, what am I missing?  These functions are
not identical, sorry for missing that before.

thanks,

greg k-h

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