From: Will Deacon <will@kernel.org>
To: linux-arm-kernel@lists.infradead.org,
Catalin Marinas <catalin.marinas@arm.com>
Cc: mark.rutland@arm.com, kernel-team@android.com,
Will Deacon <will@kernel.org>,
Yury Khrustalev <yury.khrustalev@arm.com>
Subject: Re: [PATCH] arm64: mte: Fix PTRACE_{PEEK,POKE}MTETAGS error documentation
Date: Fri, 11 Sep 2026 14:44:08 +0100 [thread overview]
Message-ID: <178913101591.2459695.4180294828056716193.b4-ty@kernel.org> (raw)
In-Reply-To: <20260907113151.363924-1-catalin.marinas@arm.com>
On Mon, 07 Sep 2026 12:30:25 +0100, Catalin Marinas wrote:
> PTRACE_{PEEK,POKE}MTETAGS return -EIO rather than -EOPNOTSUPP (as
> documented) when no tags are copied from/to a mapping without PROT_MTE.
> This has been the behaviour since the interface was introduced, though
> the original intent was to distinguish between address not being
> accessible and mapped as untagged.
>
> Update the documentation to match the implementation (de-facto ABI).
> Since -EOPNOTSUPP was never returned, change the error assignment to
> -EIO as well to avoid confusion.
>
> [...]
Applied to arm64 (for-next/fixes), thanks!
[1/1] arm64: mte: Fix PTRACE_{PEEK,POKE}MTETAGS error documentation
https://git.kernel.org/arm64/c/fdb9ebc7fb77
Cheers,
--
Will
https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev
prev parent reply other threads:[~2026-09-11 13:44 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-07 11:30 [PATCH] arm64: mte: Fix PTRACE_{PEEK,POKE}MTETAGS error documentation Catalin Marinas
2026-09-11 13:44 ` Will Deacon [this message]
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