linux-kernel - Re: [PATCH] m68k/mac: Don't call via_flush

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Message-ID: <CAMuHMdWarWbrk102wRMgpM=D9TjEYJFP=WakD=rca_EgORxedw@mail.gmail.com>
Date:   Mon, 25 May 2020 10:41:41 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Finn Thain <fthain@...egraphics.com.au>
Cc:     Joshua Thompson <funaho@...ai.org>,
        linux-m68k <linux-m68k@...ts.linux-m68k.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] m68k/mac: Don't call via_flush_cache() on Mac IIfx

On Wed, May 20, 2020 at 6:41 AM Finn Thain <fthain@...egraphics.com.au> wrote:
> There is no VIA2 chip on the Mac IIfx, so don't call via_flush_cache().
> This avoids a boot crash which appeared in v5.4.

[...]

> Thanks to Stan Johnson for capturing the console log and running git
> bisect.
>
> Git bisect said commit 8e3a68fb55e0 ("dma-mapping: make
> dma_atomic_pool_init self-contained") is the first "bad" commit. I don't
> know why. Perhaps mach_l2_flush first became reachable with that commit.
>
> Cc: Joshua Thompson <funaho@...ai.org>
> Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
> Reported-and-tested-by: Stan Johnson <userm57@...oo.com>
> Signed-off-by: Finn Thain <fthain@...egraphics.com.au>

Reviewed-by: Geert Uytterhoeven <geert@...ux-m68k.org>
i.e. will queue in the m68k for-v5.8 branch.

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