From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 54159EB64DA for ; Wed, 12 Jul 2023 10:12:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232118AbjGLKMB (ORCPT ); Wed, 12 Jul 2023 06:12:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40324 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231615AbjGLKL7 (ORCPT ); Wed, 12 Jul 2023 06:11:59 -0400 Received: from jabberwock.ucw.cz (jabberwock.ucw.cz [46.255.230.98]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 772571993; Wed, 12 Jul 2023 03:11:58 -0700 (PDT) Received: by jabberwock.ucw.cz (Postfix, from userid 1017) id B9CD31C0E01; Wed, 12 Jul 2023 12:11:56 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ucw.cz; s=gen1; t=1689156716; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=l2Y4PoQq7t84wSDXhTjv7xxRnyRD7me00mbEwlLgnHk=; b=HSznmEO/ofiqKcE49Py+QgfRHivNm06Si3TCpCQUabEBo/MKU7poY5N34pV+UlECSTg2k0 r9L7WQcnWAcFUtZF9U+kTrKDaeo36HbREFgXaiiiBOjW4eYhPLt1+dvUrrmAFZfvLm43dO JRDSfU8UiuP+TOMx3hGqYvm4o+1SY0A= Date: Wed, 12 Jul 2023 12:11:56 +0200 From: Pavel Machek To: Sasha Levin Cc: linux-kernel@vger.kernel.org, stable@vger.kernel.org, "Paul E. McKenney" , frederic@kernel.org, quic_neeraju@quicinc.com, joel@joelfernandes.org, josh@joshtriplett.org, boqun.feng@gmail.com, rcu@vger.kernel.org Subject: Re: [PATCH AUTOSEL 5.10] rcu: Mark rcu_cpu_kthread() accesses to ->rcu_cpu_has_work Message-ID: References: <20230702195806.1793552-1-sashal@kernel.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="T5plQyocUu8y0Gz4" Content-Disposition: inline In-Reply-To: <20230702195806.1793552-1-sashal@kernel.org> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --T5plQyocUu8y0Gz4 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sun 2023-07-02 15:58:06, Sasha Levin wrote: > From: "Paul E. McKenney" >=20 > [ Upstream commit a24c1aab652ebacf9ea62470a166514174c96fe1 ] >=20 > The rcu_data structure's ->rcu_cpu_has_work field can be modified by > any CPU attempting to wake up the rcuc kthread. Therefore, this commit > marks accesses to this field from the rcu_cpu_kthread() function. >=20 > This data race was reported by KCSAN. Not appropriate for backporting > due to failure being unlikely. Please drop. Best regards, Pavel --=20 People of Russia, stop Putin before his war on Ukraine escalates. --T5plQyocUu8y0Gz4 Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iF0EABECAB0WIQRPfPO7r0eAhk010v0w5/Bqldv68gUCZK58bAAKCRAw5/Bqldv6 8rD3AKCF4LKQV/oMG3jBaJY+I5XJc8o0+gCeOWkaQmErzClV1y77SKWv2TSDAKA= =R0/9 -----END PGP SIGNATURE----- --T5plQyocUu8y0Gz4--