From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from fanzine2.igalia.com (fanzine2.igalia.com [213.97.179.56]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AA26B3CF05E for ; Fri, 20 Mar 2026 16:09:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=213.97.179.56 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774022949; cv=none; b=lPQXV+n0UMPj2nMfBnzk4WNQoylZWzJ56ZXxBtpcFvDQ516nDEBY0ZU2ErbFlexkYJBS9bz6nFzCdSjw6RBBu9yBEKmASGdMZ4kAElak9dKVqnRwtHnGp1dnAKnxUXsvHYzOijvjvujj4cXOc1sH7DGz6n4pl7T1g9LL17TN/tY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774022949; c=relaxed/simple; bh=W67o9D4Q/QlveRz7sZfT9mPBv9e4GzFHY2YSlw/qqyA=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=mGcY5wXYW3DdX0x9BIS26lprg5XZjE8opp9qTkJI+7IoCp+aMnmtesI4yM09JCapp/QXHhFydhoC8//eZEE2Jqxd48RXTQmUuCkHBkTbTFkrshS8cv5TtVBJrjVQ/NjasiDdE7Jl/ddNThRzTQ1wZ4hc76st4p5dVcsqhEWS7I0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=igalia.com; spf=pass smtp.mailfrom=igalia.com; dkim=pass (2048-bit key) header.d=igalia.com header.i=@igalia.com header.b=cKXcZ0gy; arc=none smtp.client-ip=213.97.179.56 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=igalia.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=igalia.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=igalia.com header.i=@igalia.com header.b="cKXcZ0gy" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=igalia.com; s=20170329; h=Content-Transfer-Encoding:Content-Type:In-Reply-To:From: References:Cc:To:Subject:MIME-Version:Date:Message-ID:Sender:Reply-To: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=7hFDoT+olpPq+OesoNylvgKXTMKlFUgb3HV3HYznHN8=; b=cKXcZ0gyUtaiki/lIjNS0mAn8U wsICvYvnfvLnnS/PxTs1eS2GKuwWdOBrFOEj67PBAO38IBRlp30/7X7s8DAtR07oih/EQyN2sqJUD 37vcdlcs3U+GdNfni5zJQZaE8F6THQjDoPA6pbkkTLhM5lySUY7EI1IP8cxkfMcW/CuOdq6AjZ/WF w0y04vIlUoCosZFMiFqxfNLYu9W5Ac/EGoasFrKfWsCf+vS22V+OGszxJi28TFdCSSKu4+6XEQCED ih02ZSQOuXCAQIBvYAkZwmLDM1f7BFyltREhp/O35zTnK+JFeb1nam282AtkiEz0+sOF4yVYifNCR 1kxq0Jzg==; Received: from [179.118.189.200] (helo=[192.168.15.100]) by fanzine2.igalia.com with esmtpsa (Cipher TLS1.3:ECDHE_X25519__RSA_PSS_RSAE_SHA256__AES_128_GCM:128) (Exim) id 1w3cP8-003sa6-7X; Fri, 20 Mar 2026 17:08:54 +0100 Message-ID: Date: Fri, 20 Mar 2026 13:08:47 -0300 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Beta Subject: Re: [patch v2 05/11] x86: Select ARCH_STORE_IMPLIES_RELEASE To: Thomas Gleixner Cc: Mathieu Desnoyers , Sebastian Andrzej Siewior , Carlos O'Donell , Peter Zijlstra , Florian Weimer , Rich Felker , LKML , Torvald Riegel , Darren Hart , Ingo Molnar , Davidlohr Bueso , Arnd Bergmann , "Liam R . Howlett" , Uros Bizjak , =?UTF-8?Q?Thomas_Wei=C3=9Fschuh?= References: <20260319225224.853416463@kernel.org> <20260319231239.477866560@kernel.org> Content-Language: en-US From: =?UTF-8?Q?Andr=C3=A9_Almeida?= In-Reply-To: <20260319231239.477866560@kernel.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Em 19/03/2026 20:24, Thomas Gleixner escreveu: > The generic unsafe_atomic_store_release_user() implementation does: > > if (!IS_ENABLED(CONFIG_ARCH_STORE_IMPLIES_RELEASE)) > smp_mb(); > unsafe_put_user(); > > As stores on x86 imply release, select ARCH_STORE_IMPLIES_RELEASE to avoid > the unnecessary smp_mb(). > > Signed-off-by: Thomas Gleixner Reviewed-by: André Almeida