linux-kernel - Re: [PATCH v3 00/21] arm64: Move kernel mode FPSIMD buffer to the stack

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Message-ID: <CAMj1kXEBworuqfQiGpekTdDsa1R5y3jCmS_U91vGCHyhY9QLxg@mail.gmail.com>
Date: Tue, 21 Oct 2025 11:23:08 +0200
From: Ard Biesheuvel <ardb@...nel.org>
To: Eric Biggers <ebiggers@...nel.org>
Cc: Ard Biesheuvel <ardb+git@...gle.com>, linux-arm-kernel@...ts.infradead.org, 
	linux-kernel@...r.kernel.org, linux-crypto@...r.kernel.org, 
	herbert@...dor.apana.org.au, Marc Zyngier <maz@...nel.org>, Will Deacon <will@...nel.org>, 
	Mark Rutland <mark.rutland@....com>, Kees Cook <keescook@...omium.org>, 
	Catalin Marinas <catalin.marinas@....com>, Mark Brown <broonie@...nel.org>
Subject: Re: [PATCH v3 00/21] arm64: Move kernel mode FPSIMD buffer to the stack

On Fri, 17 Oct 2025 at 19:08, Eric Biggers <ebiggers@...nel.org> wrote:
>
> On Wed, Oct 08, 2025 at 05:45:34PM +0200, Ard Biesheuvel wrote:
> > From: Ard Biesheuvel <ardb@...nel.org>
> >
> > Move the buffer for preserving/restoring the kernel mode FPSIMD state on a
> > context switch out of struct thread_struct, and onto the stack, so that
> > the memory cost is not imposed needlessly on all tasks in the system.
>
> This patchset needs the following fixup to build:
>

Indeed - thanks for the head's up, although the robots already
informed me as well.