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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C7E6EF33809 for ; Tue, 17 Mar 2026 07:27:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=+E5JExlH1gsTbrfMSDrOrCsvoCvNuc0M7joRkI7q/a0=; b=aowNcyZmrOabOdbHUuMBjV89Oq dPtrFhOm8Y1deOAYf9Gn5IxbkbKGod9CtP0O3Pzo4G++drNF5Fy0fPWj+7K6KizPSt+ocf8dQjAw4 CQMsIsMgknOxfXptZXcftMvfnW0IiW5boSlJ8De5I0nu/qohP4dtoaF1LRtaPq/kHyjVce23iCQBb 9M4188E8eUAl4Bs5us0fjN/yI2DyhNsbwEiK1rfBgp4aPwWKXuilG0dLMknQNoHBUx1O9m19dfGLx 8wgEQEQ1nptxlBesoF826yHNlkg/HXB5ieTEJDN+cRT0KmjuvD+Cs1mMg3BV7TBwHWxzYUURTp2GO AmonQevg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1w2OpU-00000005ZPE-22sD; Tue, 17 Mar 2026 07:27:04 +0000 Received: from zeus03.de ([194.117.254.33] helo=mail.zeus03.de) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1w2OpQ-00000005ZOE-2dXY for linux-arm-kernel@lists.infradead.org; Tue, 17 Mar 2026 07:27:03 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= sang-engineering.com; h=date:from:to:cc:subject:message-id :references:mime-version:content-type:in-reply-to; s=k1; bh=+E5J ExlH1gsTbrfMSDrOrCsvoCvNuc0M7joRkI7q/a0=; b=G1SOiayi7IoPrStzYmkA vE7X7q92XlvwYuEl9Qq+m43cNpJ1xkkG+3XSjgJJ6u1gQUoFRCQaWvd0ltaIwWz/ HONuSZqyrenHqXgFemBvGilKgGqmEuKXcnp8Z15LGRMALDs51AhRCugiRG2ZV4Px 7B8PLtMebupyzkbYa1PW8sHAh8ZqVD5/mREnBxYk3r9vU+BvmA5PxdwAF0in6ofA GidGANePhLce/03m5Xss1p3CFf+7JesvhB182Kx4jRpvr5t72lro76lUMfRTZflS 96CCkOxwe23kNqh//4oAvR+2RX1AQZM5LMQLBymy9yiVdMAaxP+s1rKPe3u/WBsI nA== Received: (qmail 162337 invoked from network); 17 Mar 2026 08:26:53 +0100 Received: by mail.zeus03.de with ESMTPSA (TLS_AES_256_GCM_SHA384 encrypted, authenticated); 17 Mar 2026 08:26:53 +0100 X-UD-Smtp-Session: l3s3148p1@khhxQjNNeKhSwmvS Date: Tue, 17 Mar 2026 08:26:53 +0100 From: Wolfram Sang To: Douglas Anderson Cc: Greg Kroah-Hartman , "Rafael J . Wysocki" , Danilo Krummrich , stable@vger.kernel.org, Andrew Lunn , Andy Shevchenko , Daniel Scally , "David S. Miller" , Eric Dumazet , Fabio Estevam , Frank Li , Heikki Krogerus , Heiner Kallweit , Jakub Kicinski , Len Brown , Mark Brown , Paolo Abeni , Pengutronix Kernel Team , Rob Herring , Russell King , Sakari Ailus , Saravana Kannan , Sascha Hauer , devicetree@vger.kernel.org, driver-core@lists.linux.dev, imx@lists.linux.dev, linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org, netdev@vger.kernel.org Subject: Re: [PATCH] device property: Make modifications of fwnode "flags" thread safe Message-ID: References: <20260316154159.1.I0a4d03104ecd5103df3d76f66c8d21b1d15a2e38@changeid> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260316154159.1.I0a4d03104ecd5103df3d76f66c8d21b1d15a2e38@changeid> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260317_002701_546121_6E7B3CA9 X-CRM114-Status: GOOD ( 11.50 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Doug, thanks for tackling this issue! I agree it should be fixed, just wondered about one thing: > While flags are often modified while under the "fwnode_link_lock", > this is not universally true. Is it a possibility to use the lock in all code paths instead? Because... > struct list_head consumers; > - u8 flags; > + unsigned long flags; ... this change costs some memory on every system. Maybe it can be avoided? Happy hacking, Wolfram