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 28189C433F5 for ; Wed, 4 May 2022 12:03:06 +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:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=jbpwngwetLTdqVk2GB4yaTVJF6M5CiemNNNbS5ARrms=; b=h3Y6mLBImFggI/ 0sTIMZbKOmaS3pdktq3adP7NSDdK6zd8IO2giLLfpSYqFMWar8/iuiHaBKwMx6kiMQ4eD4fkuQ4y1 3lSvi2d/bmwPJyfZsTSHQa7NjMMgtjDFHXLN3BZdQHGBl+vxR6N9m8NIZm00hBbockCJ7rmsUrEBN OZAKXqvOaTtYl3ZsL8Ew9Xb2ndclYD4Ggy2NGboTnpjb23dVRlufKQDMaxHG+AZmbZwhhdJEZGk/j H/jfP95l4HgyVjLSHxxjV0p5KmoS9YdOZwsOsqsnCBO5S/aD81aY5IaFFNsUJQRfqMh5EbBzTchjd aI8GTU3lcVcr94L44UOw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nmDiY-00Ac8O-Fa; Wed, 04 May 2022 12:02:54 +0000 Received: from gloria.sntech.de ([185.11.138.130]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nmDiV-00Ac7h-Sx for linux-riscv@lists.infradead.org; Wed, 04 May 2022 12:02:53 +0000 Received: from ip5b412258.dynamic.kabel-deutschland.de ([91.65.34.88] helo=diego.localnet) by gloria.sntech.de with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1nmDiP-0001Qi-Em; Wed, 04 May 2022 14:02:45 +0200 From: Heiko =?ISO-8859-1?Q?St=FCbner?= To: Arnd Bergmann , linux-riscv@lists.infradead.org Cc: guoren@kernel.org, peterz@infradead.org, mingo@redhat.com, Will Deacon , longman@redhat.com, boqun.feng@gmail.com, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, Paul Walmsley , Palmer Dabbelt , aou@eecs.berkeley.edu, Arnd Bergmann , Greg KH , sudipm.mukherjee@gmail.com, macro@orcam.me.uk, jszhang@kernel.org, linux-csky@vger.kernel.org, linux-kernel@vger.kernel.org, openrisc@lists.librecores.org, linux-riscv@lists.infradead.org, linux-arch@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Palmer Dabbelt , Palmer Dabbelt Subject: Re: [PATCH v4 5/7] RISC-V: Move to generic spinlocks Date: Wed, 04 May 2022 14:02:44 +0200 Message-ID: <3428595.iIbC2pHGDl@diego> In-Reply-To: <20220430153626.30660-6-palmer@rivosinc.com> References: <20220430153626.30660-1-palmer@rivosinc.com> <20220430153626.30660-6-palmer@rivosinc.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220504_050251_937212_1DA9CF7A X-CRM114-Status: GOOD ( 14.17 ) X-BeenThere: linux-riscv@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-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Am Samstag, 30. April 2022, 17:36:24 CEST schrieb Palmer Dabbelt: > From: Palmer Dabbelt > > Our existing spinlocks aren't fair and replacing them has been on the > TODO list for a long time. This moves to the recently-introduced ticket > spinlocks, which are simple enough that they are likely to be correct > and fast on the vast majority of extant implementations. > > This introduces a horrible hack that allows us to split out the spinlock > conversion from the rwlock conversion. We have to do the spinlocks > first because qrwlock needs fair spinlocks, but we don't want to pollute > the asm-generic code to support the generic spinlocks without qrwlocks. > Thus we pollute the RISC-V code, but just until the next commit as it's > all going away. > > Signed-off-by: Palmer Dabbelt on riscv64+riscv32 qemu, beaglev and d1-nezha Tested-by: Heiko Stuebner _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv