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Date: Sat, 25 Jul 2026 07:17:49 +0200
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Nathan Chancellor <nathan@kernel.org>
Cc: Sasha Levin <sashal@kernel.org>, stable@vger.kernel.org,
	Nick Desaulniers <ndesaulniers@google.com>,
	Marcus Seyfarth <m.seyfarth@gmail.com>
Subject: Re: Please apply 90dfeef1cd38 to 6.1 through 6.18
Message-ID: <2026072534-strife-astronomy-3122@gregkh>
References: <20260725011342.GA2792705@ax162>
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In-Reply-To: <20260725011342.GA2792705@ax162>

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