Received: by 10.213.65.68 with SMTP id h4csp543611imn; Fri, 16 Mar 2018 11:00:12 -0700 (PDT) X-Google-Smtp-Source: AG47ELvqvBj8dJSpnvH5PbZgR2LEc3bzRHKYpe37vrs3NA1F8uO/8i/v3mW/z4QUPK4FLV9zSESW X-Received: by 10.98.238.2 with SMTP id e2mr2316358pfi.68.1521223212833; Fri, 16 Mar 2018 11:00:12 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1521223212; cv=none; d=google.com; s=arc-20160816; b=BhJt/tl1zJkiWxmZm5qtZTIG19MsguJ1jg8hSUmw5J1P0eSoAhAK3EywTogI2ERwHL aQNA+VHCCseNjdYbwYpAhXHLquYUJdv+KSyH0qA8Gu0Ey19ylWw/ZM5wx1PL/B6kYA7k zU2bEC+YIAJTumSAOYlQ4xNeMmMZtGwyLyxLuOMC5xceHoDYOaOsH2z/4HPq7Mc6DvxM DrIuoXJfGw4leU6zRO/K8aX+xylmBqK3SnSWlABAgtSsTYnEX/saBEu9unzghZtnbyUt Re5k1U1k29bhOCxHS7z/MP1g9T9ObvSlxeOV7Uv4bMHDrSj8y0lnDh6rRAjzEsx278QM Kogg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-disposition:mime-version:references:message-id:subject:cc :to:from:date:dkim-signature:arc-authentication-results; bh=XpplwvXxqREX8SKqPKNRUAvxYVLvozTqtM7wALx4qS0=; b=iffCFEq20ZyMwFmeIGqzqsOG8U+hhKyRXFvPOjt++0VXgB/7/hwb++sL9ZBkD0KV3M 2bORsyxX0fhej75ICKxmK7jh6xCJBGlnqwperliMcOEOLGlNtOLZeHKj3McJfuoNEu49 zxNzFW8VisX3LLj7sSjwVRRtE+DU/a6vXqKWAda72MXp1F5Mq4OCNljV2mGlrTTXtvE7 SjBDNPKxVxh3z73lIHyROofip1EHjmgEYeuMFbGrOWbw3vMDHFasBqf9H4EQUyXjzurs +3r6yrnSD3qK/jqgOcFzY1upl7YhrJIw+25vtQxVARHeZu1vX+jvR4CQeAXJpN5D0QJ1 8IVg== ARC-Authentication-Results: i=1; mx.google.com; dkim=fail header.i=@infradead.org header.s=merlin.20170209 header.b=Ets1Ck3l; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id e8-v6si5514998pli.224.2018.03.16.10.59.58; Fri, 16 Mar 2018 11:00:12 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=fail header.i=@infradead.org header.s=merlin.20170209 header.b=Ets1Ck3l; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753017AbeCPR7C (ORCPT + 99 others); Fri, 16 Mar 2018 13:59:02 -0400 Received: from merlin.infradead.org ([205.233.59.134]:55522 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751916AbeCPR7A (ORCPT ); Fri, 16 Mar 2018 13:59:00 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=merlin.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=XpplwvXxqREX8SKqPKNRUAvxYVLvozTqtM7wALx4qS0=; b=Ets1Ck3lh9tINQBdd7u2twlXz ZLGt/D3R8752Rw17w5Oy2aYatAfmV26F74BIEl+P9E++0nnEWVq85xFoZw0y21VfksFfQ5KKgeafu lFXhWslZB86I9ne/3N15Ye6vXHToGahCSlCGCY5vIsOmEvt2I/W8n6a8FYg+ndNgFaNbvpchkdRG/ 9qdv9RumWuEF/QMWXtN0Vqn0KAT/SvdAA6tRvRndAaiBw7kjxWSldx4Csh+hhxQWzfcSKks/0ENGu j98isrkHnauuCkCqM8LugGn9RAYRCTwYdDWEo1sq4nOhFSDlIP6qdghasfWKNtvKKDyE5m43I0DHR vv4DmWeqA==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=hirez.programming.kicks-ass.net) by merlin.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1ewtd3-0006ca-Cg; Fri, 16 Mar 2018 17:58:57 +0000 Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 41E0C2029F860; Fri, 16 Mar 2018 18:58:56 +0100 (CET) Date: Fri, 16 Mar 2018 18:58:56 +0100 From: Peter Zijlstra To: Vineet Gupta Cc: Alexey Brodkin , "linux-kernel@vger.kernel.org" , "linux-arch@vger.kernel.org" , "linux-snps-arc@lists.infradead.org" Subject: Re: arc_usr_cmpxchg and preemption Message-ID: <20180316175856.GD4043@hirez.programming.kicks-ass.net> References: <1521045375.11552.27.camel@synopsys.com> <20180314175352.GP4064@hirez.programming.kicks-ass.net> <1521221606.4805.16.camel@synopsys.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.3 (2018-01-21) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Mar 16, 2018 at 10:54:52AM -0700, Vineet Gupta wrote: > I'd say just bite the bullet, write the patch and we can refine it there ! Just be glad its not futex.c proper ;-) I'll try and have a look later..