linux-kernel - Re: seqlock: Cure some more scoped

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Message-ID: <aTPuvn3S9tKcyYCu@gmail.com>
Date: Sat, 6 Dec 2025 09:52:14 +0100
From: Ingo Molnar <mingo@...nel.org>
To: Peter Zijlstra <peterz@...radead.org>
Cc: arnd@...db.de, oleg@...hat.com, linux-kernel@...r.kernel.org
Subject: Re: seqlock: Cure some more scoped_seqlock() optimization fails

* Peter Zijlstra <peterz@...radead.org> wrote:

> Arnd reported an x86 randconfig using gcc-15 tripped over
> __scoped_seqlock_bug(). Turns out GCC chose not to inline the
> scoped_seqlock helper functions and as such was not able to optimize
> properly.

BTW., I found a Clang randconfig too that fails the build, so it's
not limited to GCC.

Thanks,

	Ingo