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 X-Spam-Level: X-Spam-Status: No, score=-2.5 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D5C07C2D0CE for ; Tue, 21 Jan 2020 10:30:42 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 9E2BE20678 for ; Tue, 21 Jan 2020 10:30:42 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="NqTKn/U9"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="0MP6HHPr" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9E2BE20678 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject: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=/K1Cora4reFTo2BgzbxODZ1YWr2YYVBU3SP/Z/CFJ9g=; b=NqTKn/U9BRhbF7 Zp6fY283enYJO0vsfD+is2GKD0Suh795lyEmiYZuIzpmTwFGyzvVV1j5F1purOvziQzxF4yj3tvsf 7M1bAqGLtEvMUTi591alejA+tLCi3jVvX2PpBJxCkHK++dOV9w5McjSGckHGHBZ3PuCcKRMF3CDu4 xP9b8PiDsHH22F43lMO9cC7Ee0NIoKVW/welSvzbIdDPGBavgBXSl/5vlTVU+Sn+acO6S6BxYcbPw 9xzc2GJUo/LFkbJqd9F4PR+b9dr1Odwwq3DpKeE7De0z2fq2slnX99TPYlW7o+oY0U+n35H8pORku 572fXc5+/cwzJmDyEz6Q==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1itqnx-0007RH-I1; Tue, 21 Jan 2020 10:30:41 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1itqnd-0007ET-Fc for linux-arm-kernel@lists.infradead.org; Tue, 21 Jan 2020 10:30:25 +0000 Received: from willie-the-truck (236.31.169.217.in-addr.arpa [217.169.31.236]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id DE7C620678; Tue, 21 Jan 2020 10:30:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1579602621; bh=CFvr2yZi8uW4XNkhcRrDChld0311DjfCPF5hmWVFq2M=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=0MP6HHPrVVzubge9LFKPs2C7/a5MhgGKkqCgklkd87xtb5fGI0LbX2zgVFRKSm31N 2MVekLMbQ1OB+TCX4J0MFIBvX9z/YUwE5S6aoQ71QpYqnygk3WXBrW7UgvuJ08gfl2 shlScMCvueUcvHYilImUt8EImVg25wKcTpUwdmrA= Date: Tue, 21 Jan 2020 10:30:16 +0000 From: Will Deacon To: Peter Zijlstra Subject: Re: [RFC v5 12/57] objtool: check: Allow jumps from an alternative group to itself Message-ID: <20200121103016.GB11154@willie-the-truck> References: <20200109160300.26150-1-jthierry@redhat.com> <20200109160300.26150-13-jthierry@redhat.com> <20200120145656.GC14897@hirez.programming.kicks-ass.net> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20200120145656.GC14897@hirez.programming.kicks-ass.net> User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200121_023021_567205_3B0F3564 X-CRM114-Status: GOOD ( 10.16 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Julien Thierry , catalin.marinas@arm.com, linux-kernel@vger.kernel.org, raphael.gault@arm.com, jpoimboe@redhat.com, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, Jan 20, 2020 at 03:56:56PM +0100, Peter Zijlstra wrote: > On Thu, Jan 09, 2020 at 04:02:15PM +0000, Julien Thierry wrote: > > Alternatives can contain instructions that jump to another instruction > > in the same alternative group. This is actually a common pattern on > > arm64. > > LL/SC I bet... I think there are some nasty errata workarounds that need it too. WIll _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel