* Please apply 90dfeef1cd38 to 6.1 through 6.18
@ 2026-07-25 1:13 Nathan Chancellor
2026-07-25 5:17 ` Greg Kroah-Hartman
0 siblings, 1 reply; 2+ messages in thread
From: Nathan Chancellor @ 2026-07-25 1:13 UTC (permalink / raw)
To: Greg Kroah-Hartman, Sasha Levin; +Cc: stable, Nick Desaulniers, Marcus Seyfarth
Hi stable folks,
Upstream commit cc39f3872c08 ("seqlock: Introduce
scoped_seqlock_read()") was backported in several stable branches (6.18
through 6.1) recently without a necessary fix, commit 90dfeef1cd38
("seqlock: Cure some more scoped_seqlock() optimization fails"),
breaking the build for certain configurations
https://github.com/ClangBuiltLinux/linux/issues/2178
Please consider applying 90dfeef1cd38 to 6.18 through 6.1 to avoid this,
it applies cleanly to all those trees for me. You may also want to
consider taking
b94d45b6bbb4 ("seqlock: Allow KASAN to fail optimizing")
88331c4ec23a ("seqlock: Allow UBSAN_ALIGNMENT to fail optimizing")
but I did not test if they were clean cherry picks.
--
Cheers,
Nathan
^ permalink raw reply [flat|nested] 2+ messages in thread* Re: Please apply 90dfeef1cd38 to 6.1 through 6.18
2026-07-25 1:13 Please apply 90dfeef1cd38 to 6.1 through 6.18 Nathan Chancellor
@ 2026-07-25 5:17 ` Greg Kroah-Hartman
0 siblings, 0 replies; 2+ messages in thread
From: Greg Kroah-Hartman @ 2026-07-25 5:17 UTC (permalink / raw)
To: Nathan Chancellor; +Cc: Sasha Levin, stable, Nick Desaulniers, Marcus Seyfarth
On Fri, Jul 24, 2026 at 06:13:42PM -0700, Nathan Chancellor wrote:
> Hi stable folks,
>
> Upstream commit cc39f3872c08 ("seqlock: Introduce
> scoped_seqlock_read()") was backported in several stable branches (6.18
> through 6.1) recently without a necessary fix, commit 90dfeef1cd38
> ("seqlock: Cure some more scoped_seqlock() optimization fails"),
> breaking the build for certain configurations
>
> https://github.com/ClangBuiltLinux/linux/issues/2178
>
> Please consider applying 90dfeef1cd38 to 6.18 through 6.1 to avoid this,
> it applies cleanly to all those trees for me. You may also want to
> consider taking
>
> b94d45b6bbb4 ("seqlock: Allow KASAN to fail optimizing")
> 88331c4ec23a ("seqlock: Allow UBSAN_ALIGNMENT to fail optimizing")
>
> but I did not test if they were clean cherry picks.
they do seem clean, so I've taken them all now, thanks!
greg k-h
^ permalink raw reply [flat|nested] 2+ messages in thread
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