linux-kernel - Re: m68k build failures in -next: undefined reference to `arch_dma_prep

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Message-ID: <CAMuHMdUQ1jciVUEnQc+ezh-w5jNaff3PgUyJXmOxihsYQ-3D5Q@mail.gmail.com>
Date:   Mon, 8 Jul 2019 22:40:29 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Christoph Hellwig <hch@....de>
Cc:     Guenter Roeck <linux@...ck-us.net>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        linux-m68k <linux-m68k@...ts.linux-m68k.org>,
        Greg Ungerer <gerg@...ux-m68k.org>
Subject: Re: m68k build failures in -next: undefined reference to `arch_dma_prep_coherent'

Hi Christoph,

On Mon, Jul 8, 2019 at 10:38 PM Christoph Hellwig <hch@....de> wrote:
> On Mon, Jul 08, 2019 at 10:37:33PM +0200, Christoph Hellwig wrote:
> > On Mon, Jul 08, 2019 at 10:36:05PM +0200, Geert Uytterhoeven wrote:
> > > Note that the build failure is more subtle: both m5307c3_defconfig and
> > > m5475evb_defconfig build fine in m68k/for-linus, but fail in
> > > next-20190708.  So it fails when combined with other changes, going
> > > in through a different tree (the DMA tree?).
> >
> > Yes, the dma tree adds the stub for the symbol and adds code relying
> > on that.
>
> If you give me an ack I can add the fix to the dma-mapping pull request.

Thanks, done.

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