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=-2.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 ACA12C38A2A for ; Wed, 6 May 2020 14:41:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8A51220B1F for ; Wed, 6 May 2020 14:41:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588776112; bh=ZjVkDedPJdCZEWLKjLyinPSY3peY7sOSbquAGZSrSXc=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=ZOUJf/48j9eyc4CprTcU/Ww+83mbQ1KMKYBfJg9PF8O4HKvgitRIkl2nvvm2ZyQ82 VHEga36NYJinlRSgyipm+XFY6OkDLHpW21sSpprg4gKegrNvKDUiWSps2uIAAtMXIh pjiPEaK22nH9ZVeG5La9LgTA3zH2ATlNImGrgDGA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729207AbgEFOlv (ORCPT ); Wed, 6 May 2020 10:41:51 -0400 Received: from mail.kernel.org ([198.145.29.99]:43406 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729181AbgEFOlq (ORCPT ); Wed, 6 May 2020 10:41:46 -0400 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 2F0AF20A8B; Wed, 6 May 2020 14:41:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588776106; bh=ZjVkDedPJdCZEWLKjLyinPSY3peY7sOSbquAGZSrSXc=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=aaDZk0+C8BhYp1zgcDs209t79q7vERLIBTS0H5IpGR7Jws9TnJjRF7cSpG73DBdax 1gT5PmQqxdkHOtinESnVYbItcJKanq3xAk84ateKBRjs8QzHTQYycY+aiPB3fwA+4Y /q/+jv6Yhaq3XW8bvsdS6DrXr6/J/fCyUOh0QjHk= Date: Wed, 6 May 2020 15:41:41 +0100 From: Will Deacon To: "Paul E. McKenney" Cc: mingo@kernel.org, tglx@linutronix.de, peterz@infradead.org, elver@google.com, linux-kernel@vger.kernel.org Subject: Re: Please can I have a stable KCSAN branch for 5.8? Message-ID: <20200506144141.GA12919@willie-the-truck> References: <20200506132816.GJ8043@willie-the-truck> <20200506143616.GY2869@paulmck-ThinkPad-P72> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200506143616.GY2869@paulmck-ThinkPad-P72> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Paul, Cheers for the quick reply! On Wed, May 06, 2020 at 07:36:16AM -0700, Paul E. McKenney wrote: > On Wed, May 06, 2020 at 02:28:17PM +0100, Will Deacon wrote: > > I'm looking to rebase my READ_ONCE() series [1] on top of the KCSAN patches > > so that we can get them in for 5.8. However, tip/locking/kcsan seems to be > > missing some bits: > > > > * An update to checkpatch.pl to warn about missing comments for > > data_race(): > > > > https://lore.kernel.org/r/20200401101714.44781-1-elver@google.com > > For some reason, I thought this was going up some other tree, but I do > not see it in -next. So unless I hear otherwise, I will pull it into > the v5.8 kcsan branch. Brill, thanks. > > * I'm unable to apply these two patches from Marco that are needed for > > my READ_ONCE() work: > > > > https://lore.kernel.org/lkml/20200424154730.190041-1-elver@google.com/ > > > > I think these depend on stuff that has been queued by Paul, and appears > > in linux-next, but to be honest with you I'm quite confused about what > > is queued for 5.8 and what isn't. > > This one is queued, but I currently have it in the v5.9 pile (but > tentatively for v5.8). Unless Marco tells me otherwise, I will move it > to the v5.8 branch, which will be part of my pull request next week. Great, then this would all show up on tip/locking/kscan, right? > > What's the best base for me to use? > > The -next tree has the latter, but not yet the former. That probably means -next is good enough for me to cook a new version of my series, and then I can make a proper branch next week. > Hopefully we can get this straightened out, and please accept my apologies > for the hassle! No need to apologise, I just couldn't figure out what was what and decided it was easier to ask the experts ;) Cheers again, Will