linux-kernel - Re: [PATCH v3 03/24] drivers/block/z2ram: use ioremap_wt() instead of __ioremap(_PAGE

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Date:   Tue, 9 Oct 2018 17:13:57 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Bart Van Assche <bvanassche@....org>
Cc:     Christophe Leroy <christophe.leroy@....fr>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Dominik Brodowski <linux@...inikbrodowski.net>,
        Geoff Levand <geoff@...radead.org>,
        Jens Axboe <axboe@...nel.dk>,
        Kumar Gala <galak@...nel.crashing.org>,
        Leo Li <leoyang.li@....com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Nicholas Piggin <npiggin@...il.com>,
        Paul Mackerras <paulus@...ba.org>,
        Scott Wood <oss@...error.net>,
        "Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>,
        Linux Fbdev development list <linux-fbdev@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        DRI Development <dri-devel@...ts.freedesktop.org>,
        linux-block@...r.kernel.org,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Debian m68k <debian-68k@...ts.debian.org>,
        linux-m68k <linux-m68k@...ts.linux-m68k.org>
Subject: Re: [PATCH v3 03/24] drivers/block/z2ram: use ioremap_wt() instead of __ioremap(_PAGE_WRITETHRU)

Hi Bart,

CC debian-68k, linux-m68k

On Tue, Oct 9, 2018 at 5:00 PM Bart Van Assche <bvanassche@....org> wrote:
> On Tue, 2018-10-09 at 13:51 +0000, Christophe Leroy wrote:
> > _PAGE_WRITETHRU is a target specific flag. Prefer generic functions.
> >
> > Acked-by: Geert Uytterhoeven <geert@...ux-m68k.org>
> > Signed-off-by: Christophe Leroy <christophe.leroy@....fr>
>
> Hi Geert,
>
> All patches that have been applied to this driver since 2005 are API refactoring
> patches. I haven't found any patches in the history of this driver that seem to
> have been submitted by a user of this driver. Do you perhaps know whether anyone
> is using this driver?

The z2ram is a very simple driver, used to configure (slower) Zorro II RAM as
a swap device.  So I'm not so surprised no one submitted functional patches.

I believe it's still being used.
Probably it could be modified to use mtdram.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds