PROBLEM: Linux 6.8 build failure in sun ffb driver (regression)

PROBLEM: Linux 6.8 build failure in sun ffb driver (regression)

[Nick Bowler]

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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

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

[Nick Bowler]

I bisected this build failure to the following commit:

  commit 8813e86f6d82a7931446c3cbc5d596f77d0f1ba6
  Author: Thomas Zimmermann <tzimmermann@suse.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.

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

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

[Thomas Zimmermann]

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@suse.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)