linux-kernel - Re: [PATCH 1/4] mm: fix VM_UFFD_MINOR == VM_SHADOW_STACK on USERFAULTFD=y && ARM64

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Message-ID: <aBoRWZr3oGh94_qr@finisterre.sirena.org.uk>
Date: Tue, 6 May 2025 22:40:41 +0900
From: Mark Brown <broonie@...nel.org>
To: Florent Revest <revest@...omium.org>
Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, catalin.marinas@....com, will@...nel.org,
	tglx@...utronix.de, mingo@...hat.com, bp@...en8.de,
	dave.hansen@...ux.intel.com, x86@...nel.org, hpa@...or.com,
	akpm@...ux-foundation.org, thiago.bauermann@...aro.org,
	jackmanb@...gle.com, stable@...r.kernel.org
Subject: Re: [PATCH 1/4] mm: fix VM_UFFD_MINOR == VM_SHADOW_STACK on
 USERFAULTFD=y && ARM64_GCS=y

On Tue, May 06, 2025 at 11:52:21AM +0200, Florent Revest wrote:
> On configs with CONFIG_ARM64_GCS=y, VM_SHADOW_STACK is bit 38.
> On configs with CONFIG_HAVE_ARCH_USERFAULTFD_MINOR=y (selected by
> CONFIG_ARM64 when CONFIG_USERFAULTFD=y), VM_UFFD_MINOR is _also_ bit 38.

Reviewed-by: Mark Brown <broonie@...nel.org>

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