linux-kernel - Re: Build regressions/improvements in v6.6-rc1

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Date:   Tue, 12 Sep 2023 08:39:35 +0200 (CEST)
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     linux-kernel@...r.kernel.org
cc:     Lee Jones <lee@...nel.org>, linux-btrfs@...r.kernel.org,
        linux-parisc@...r.kernel.org, linux-sh@...r.kernel.org
Subject: Re: Build regressions/improvements in v6.6-rc1

On Mon, 11 Sep 2023, Geert Uytterhoeven wrote:
> Below is the list of build error/warning regressions/improvements in
> v6.6-rc1[1] compared to v6.5[2].
>
> Summarized:
>  - build errors: +4/-13
>  - build warnings: +4/-1453
>
> Note that there may be false regressions, as some logs are incomplete.
> Still, they're build errors/warnings.
>
> Happy fixing! ;-)
>
> Thanks to the linux-next team for providing the build service.
>
> [1] http://kisskb.ellerman.id.au/kisskb/branch/linus/head/0bb80ecc33a8fb5a682236443c1e740d5c917d1d/ (all 237 configs)
> [2] http://kisskb.ellerman.id.au/kisskb/branch/linus/head/2dde18cd1d8fac735875f2e4987f11817cc0bc2c/ (234 out of 237 configs)
>
>
> *** ERRORS ***
>
> 4 error regressions:
>  + /kisskb/src/drivers/mfd/cs42l43.c: error: 'cs42l43_resume' defined but not used [-Werror=unused-function]:  => 1106:12
>  + /kisskb/src/drivers/mfd/cs42l43.c: error: 'cs42l43_runtime_resume' defined but not used [-Werror=unused-function]:  => 1138:12
>  + /kisskb/src/drivers/mfd/cs42l43.c: error: 'cs42l43_runtime_suspend' defined but not used [-Werror=unused-function]:  => 1124:12
>  + /kisskb/src/drivers/mfd/cs42l43.c: error: 'cs42l43_suspend' defined but not used [-Werror=unused-function]:  => 1076:12

Various configs
Fix available:
https://lore.kernel.org/r/20230822114914.340359-1-ckeepax@opensource.cirrus.com

> *** WARNINGS ***
>
> 4 warning regressions:
>  + /kisskb/src/fs/btrfs/volumes.c: warning: 'dev_offset' may be used uninitialized [-Wmaybe-uninitialized]:  => 5245:48
>  + /kisskb/src/fs/btrfs/volumes.c: warning: 'dev_offset' may be used uninitialized in this function [-Wmaybe-uninitialized]:  => 5245:34
>  + /kisskb/src/fs/btrfs/volumes.c: warning: 'max_avail' may be used uninitialized in this function [-Wmaybe-uninitialized]:  => 5246:33

parisc64-gcc13/generic-64bit_defconfig
False positive

>  + modpost: WARNING: modpost: vmlinux: section mismatch in reference: ioremap_prot+0x88 (section: .text) -> ioremap_fixed (section: .init.text):  => N/A

sh4-gcc1[123]/sh-defconfig
Fix available:
https://lore.kernel.org/r/20230911093850.1517389-1-geert+renesas@glider.be

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