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[2620:137:e000::1:20]) by mx.google.com with ESMTP id u4-20020a170902b28400b00186ab03eebfsi10673667plr.418.2022.12.19.07.46.42; Mon, 19 Dec 2022 07:46:55 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@infradead.org header.s=casper.20170209 header.b=hmTPYkhC; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232725AbiLSPqE (ORCPT + 99 others); Mon, 19 Dec 2022 10:46:04 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57906 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232611AbiLSPpa (ORCPT ); Mon, 19 Dec 2022 10:45:30 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 17D5313D61; Mon, 19 Dec 2022 07:44:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Subject:Cc:To:From:Date:Message-ID: Sender:Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To:References; bh=fH7vUY5IU4m1cKDzFBDt+eq6lohLTkHTMZiIE4ke4VY=; b=hmTPYkhC/7+cqNJUN5N9enIC/k RI5NBONX3QLG7mKq+yLzWmmPG8HTz/NW05/q2t+NIC08Ns9r4JZ2UscvuMGis6p5aIV98rt+d5PYB nAJujak0DMGsy0jBuXm6mns7IRswwY028uKylH5d6HEyxKa0v7TWHR4V7NhweEQZexadjXP2cENfB PN0CBN/Z4zLKueR3qNhwICGa49xaayJGmuojh1b1Ti3KDYK/3ICqowGwv0pFcI9xUFdbcrZ+0iIxu Ge/5HFB3a3AtlZL/G1E9c/b18BhPteeNkIwbOO3E2lBnqhM7d/CMFvm6DhrYuPEd5j261z2I8GL8m +sBcpybw==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1p7IIS-000qwa-OK; Mon, 19 Dec 2022 15:43:20 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 9B358300193; Mon, 19 Dec 2022 16:43:06 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 6037520A1AB9F; Mon, 19 Dec 2022 16:43:06 +0100 (CET) Message-ID: <20221219153525.632521981@infradead.org> User-Agent: quilt/0.66 Date: Mon, 19 Dec 2022 16:35:25 +0100 From: Peter Zijlstra To: torvalds@linux-foundation.org Cc: corbet@lwn.net, will@kernel.org, peterz@infradead.org, boqun.feng@gmail.com, mark.rutland@arm.com, catalin.marinas@arm.com, dennis@kernel.org, tj@kernel.org, cl@linux.com, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, Herbert Xu , davem@davemloft.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, joro@8bytes.org, suravee.suthikulpanit@amd.com, robin.murphy@arm.com, dwmw2@infradead.org, baolu.lu@linux.intel.com, Arnd Bergmann , penberg@kernel.org, rientjes@google.com, iamjoonsoo.kim@lge.com, Andrew Morton , vbabka@suse.cz, roman.gushchin@linux.dev, 42.hyeyoo@gmail.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-s390@vger.kernel.org, linux-crypto@vger.kernel.org, iommu@lists.linux.dev, linux-arch@vger.kernel.org Subject: [RFC][PATCH 00/12] Introduce cmpxchg128() -- aka. the demise of cmpxchg_double() X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED,SPF_HELO_NONE, SPF_NONE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1752657890816300700?= X-GMAIL-MSGID: =?utf-8?q?1752657890816300700?= Hi, Since Linus hated on cmpxchg_double(), a few patches to get rid of it, as proposed here: https://lkml.kernel.org/r/Y2U3WdU61FvYlpUh@hirez.programming.kicks-ass.net based on tip/master because Linus' tree is moving a wee bit fast at the moment. 0day robot is all green for building, very limited testing on arm64/s390 for obvious raisins -- I tried to get the asm right, but please, double check. Signed-off-by: Boqun Feng