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 02900C64ED8 for ; Mon, 27 Feb 2023 09:55:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=aUw4THXXKVGmN6aKTd7mIicUA3FkCJZVOpcEcWbr21M=; b=bfONFEOUdS976Y SRRXDR83A2mjLl1oiqGXgYl1pl/d8DzM94vPtQiOvdeIlXLe+xml4KCsISkqsPKzLlLwYn9JqyE27 5MmskY5dgacQoHtJcbatcbU9BgouNJAv9evyr29yWDyyAaYmvk2GUWSLWJQ5ZxIAoTT4hASIXg+RC WD8sLtf6H7NYSuvapcnGvXpcYX8wW0KrpSdDjomNmO9ldK3e7PTosyo84Dc6xylCvzBJ+SSfsrO41 MM7Xz1+i4irgJ9c+Ify/c2NIMYsNeMsNViXHYwPtdtAPBZci5y9p2SMYJwQ/dVO8ciniZ7dB1Geqc poov78Qkdg4U8P1baRWg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pWaCz-00969i-PJ; Mon, 27 Feb 2023 09:54:13 +0000 Received: from mga01.intel.com ([192.55.52.88]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1pWaCt-00966Z-TW; Mon, 27 Feb 2023 09:54:11 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1677491647; x=1709027647; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=f/bLJaqaLfK7yUfdWWThO9xflQ5SoY/AGk04yxsIRKk=; b=kwI7Q9l5oxIxbWMJiKs7tsQAahX6WUk4KL9FiveQ0EJEMs/89+t3miQq 6OJqiRlyyeXapppgnvpDOeAif3fhSMARYOtg6+PPvgwRQRii5XaT+KanF 9cN49egZ5B0p2b7qtIIcSido6qDg4II3j/1tIhcQxbcP/UlfrooeEt0vQ MbrKxwZimKAtoi0I5H3KHuDbOLCp0Mc+3N7UWRB4+CWTsyRWpR573z6rM sAatqULG1Xawj68naHHoONFWfDTqwgSNzdN+WDdTha3Zs6kKeAOK4OJvj M2Ie7w4XTKcaXrgbqoa+3907tLYyildmErYxG4rd2WytLQmU5CLVRGUUo g==; X-IronPort-AV: E=McAfee;i="6500,9779,10633"; a="361379827" X-IronPort-AV: E=Sophos;i="5.97,331,1669104000"; d="scan'208";a="361379827" Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Feb 2023 01:54:06 -0800 X-IronPort-AV: E=McAfee;i="6500,9779,10633"; a="919240678" X-IronPort-AV: E=Sophos;i="5.97,331,1669104000"; d="scan'208";a="919240678" Received: from jrissane-mobl2.ger.corp.intel.com (HELO intel.com) ([10.249.41.42]) by fmsmga006-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Feb 2023 01:53:59 -0800 Date: Mon, 27 Feb 2023 10:53:57 +0100 From: Andi Shyti To: Andrzej Hajda Cc: linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-xtensa@linux-xtensa.org, intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, Mark Rutland , Arnd Bergmann , Peter Zijlstra , Boqun Feng , Rodrigo Vivi , Andrew Morton , Andy Shevchenko Subject: Re: [Intel-gfx] [PATCH v5 2/7] linux/include: add non-atomic version of xchg Message-ID: References: <20230118153529.57695-1-andrzej.hajda@intel.com> <20230118154450.73842-1-andrzej.hajda@intel.com> <20230118154450.73842-2-andrzej.hajda@intel.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20230118154450.73842-2-andrzej.hajda@intel.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230227_015408_096169_2450295B X-CRM114-Status: GOOD ( 10.44 ) 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Andrzej, On Wed, Jan 18, 2023 at 04:44:45PM +0100, Andrzej Hajda wrote: > The pattern of setting variable with new value and returning old > one is very common in kernel. Usually atomicity of the operation > is not required, so xchg seems to be suboptimal and confusing in > such cases. > > Signed-off-by: Andrzej Hajda > Reviewed-by: Andy Shevchenko Reviewed-by: Andi Shyti Thanks, Andi _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel