linux-kernel - Re: [PATCH v3 0/3] m68k: Bug fix and cleanup for framebuffer debug console

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Message-ID: <255c7fc4-aa15-fe51-94db-90029b22e479@yahoo.com>
Date: Wed, 11 Jun 2025 09:11:21 -0600
From: Stan Johnson <userm57@...oo.com>
To: Finn Thain <fthain@...ux-m68k.org>,
 Geert Uytterhoeven <geert@...ux-m68k.org>
Cc: linux-kernel@...r.kernel.org, linux-m68k@...ts.linux-m68k.org,
 stable@...r.kernel.org
Subject: Re: [PATCH v3 0/3] m68k: Bug fix and cleanup for framebuffer debug
 console

Tested-by: Stan Johnson <userm57@...oo.com>

On a Mac IIci, the three patches fix the lost-column issue.

I didn't notice any regressions booting the new kernel to multiuser
and accessing serial, scsi and network.

-Stan Johnson


On 3/27/25 4:39 PM, Finn Thain wrote:
> This series has a bug fix for the early bootconsole as well as some
> related efficiency improvements and cleanup.
> 
> The relevant code is subject to CONSOLE_DEBUG, which is presently only
> used with CONFIG_MAC. To test this series (in qemu-system-m68k, for example)
> it's helpful to enable CONFIG_EARLY_PRINTK and
> CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER and boot with
> kernel parameters 'console=ttyS0 earlyprintk keep_bootcon'.
> 
> ---
> Changed since v1: 
>  - Solved problem with line wrap while scrolling.
>  - Added two additional patches.
> 
> Changed since v2:
>  - Adopted addq and subq as suggested by Andreas.
> 
> 
> Finn Thain (3):
>   m68k: Fix lost column on framebuffer debug console
>   m68k: Avoid pointless recursion in debug console rendering
>   m68k: Remove unused "cursor home" code from debug console
> 
>  arch/m68k/kernel/head.S | 73 +++++++++++++++++++++--------------------
>  1 file changed, 37 insertions(+), 36 deletions(-)
>