linux-kernel - Re: [PATCH] arch: um/x86: Select ARCH_SUPPORTS_ATOMIC_RMW for UML

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Message-Id: <20260106.223006.975482344774303287.fujita.tomonori@gmail.com>
Date: Tue, 06 Jan 2026 22:30:06 +0900 (JST)
From: FUJITA Tomonori <fujita.tomonori@...il.com>
To: boqun.feng@...il.com
Cc: linux-um@...ts.infradead.org, x86@...nel.org, richard@....at,
 anton.ivanov@...bridgegreys.com, johannes@...solutions.net,
 tglx@...utronix.de, mingo@...hat.com, bp@...en8.de,
 dave.hansen@...ux.intel.com, hpa@...or.com, ojeda@...nel.org,
 gary@...yguo.net, bjorn3_gh@...tonmail.com, lossin@...nel.org,
 a.hindborg@...nel.org, aliceryhl@...gle.com, tmgross@...ch.edu,
 dakr@...nel.org, linux-kernel@...r.kernel.org,
 rust-for-linux@...r.kernel.org, fujita.tomonori@...il.com
Subject: Re: [PATCH] arch: um/x86: Select ARCH_SUPPORTS_ATOMIC_RMW for
 UML_X86

On Tue,  6 Jan 2026 11:40:34 +0800
Boqun Feng <boqun.feng@...il.com> wrote:

> x86 atomic instructions are used for um on UML_X86, therefore atomics
> on UML_X86 support native atomic RmW as x86 does, hence select
> ARCH_SUPPORTS_ATOMIC_RMW.
> 
> Signed-off-by: Boqun Feng <boqun.feng@...il.com>

Reviewed-by: FUJITA Tomonori <fujita.tomonori@...il.com>