linux-kernel - Re: PROBLEM: Linux 6.8 build failure in sun ffb driver (regression)

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Date: Fri, 22 Mar 2024 09:21:57 +0100
From: Thomas Zimmermann <tzimmermann@...e.de>
To: Nick Bowler <nbowler@...conx.ca>, linux-kernel@...r.kernel.org,
 sparclinux@...r.kernel.org, regressions@...ts.linux.dev
Subject: Re: PROBLEM: Linux 6.8 build failure in sun ffb driver (regression)

Hi

Am 22.03.24 um 03:18 schrieb Nick Bowler:
> I bisected this build failure to the following commit:
>
>    commit 8813e86f6d82a7931446c3cbc5d596f77d0f1ba6
>    Author: Thomas Zimmermann <tzimmermann@...e.de>
>    Date:   Mon Nov 27 14:16:01 2023 +0100
>
>        fbdev: Remove default file-I/O implementations
>
> If I revert this commit on top of 6.8, the build is successful.

Thanks for reporting. It looks like a trivial Kconfig problem. I'll send 
a patch.

Best regards
Thomas

>
> On 2024-03-21 21:00, Nick Bowler wrote:
>> Hi,
>>
>> Linux 6.8 (and 6.8.1) are failing to build for me:
>>
>>    LD      .tmp_vmlinux.kallsyms1
>> sparc64-unknown-linux-gnu-ld: drivers/video/fbdev/ffb.o:(.rodata+0x270): undefined reference to `fb_io_read'
>> sparc64-unknown-linux-gnu-ld: drivers/video/fbdev/ffb.o:(.rodata+0x278): undefined reference to `fb_io_write'
>> make[3]: *** [/home/nbowler/misc/linux/scripts/Makefile.vmlinux:37: vmlinux] Error 1
>>
>> This problem does not occur when building Linux 6.7 which builds successfully.
>>
>> Kernel .config attached (gzipped).
>>
>> Please let me know if you need any more info.
>>
>> Thanks,
>>    Nick

-- 
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Frankenstrasse 146, 90461 Nuernberg, Germany
GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman
HRB 36809 (AG Nuernberg)