Received: by 2002:a25:c593:0:0:0:0:0 with SMTP id v141csp2013780ybe; Tue, 3 Sep 2019 06:51:33 -0700 (PDT) X-Google-Smtp-Source: APXvYqyst3IIgBUE0WkzIi8pErb9HDUqpykm//aOy0CuR6SDZEL5pT+HJOYTLtABhiVt1GlguCuh X-Received: by 2002:a17:902:547:: with SMTP id 65mr35236692plf.131.1567518693421; Tue, 03 Sep 2019 06:51:33 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1567518693; cv=none; d=google.com; s=arc-20160816; b=E+u5lA+TgrFXrvQEX9Oc+KB/j3yrv3K919yrTilv9D899hVBIATstc3KrhY4CsqI4u 8rBSQkxM2iFy1rSBjrjcbGrNW2gz6f19FNGI3cWPuV9KsbpsQUgNGyspw/GhpglK9Bsr LMSdEOwItP4QQgHsWmsbg+zqbhIMraXNCEZxN+r7XCaiVvV+HrXLnlFtmqz35ONI2kBM tXFesOgG0vx6YDIiFBolOSqNBQ3/wbaXnqeAja4ncwKsiCpXlG92bZu7zYT5SNlRrZVH E1DRyGeQu5xTCk0ybS4/cJqDhlBZ4lO/kpj7R8D8yNGpuWo8AJV9dngGP7kFL5J+XiCK Ephg== 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; bh=qAvvvTd/kG24q/y3ajQFQZLkXwSn6IFFif86NAbeoXA=; b=e2QGiMPBFgllhJsunT59Hi0ks91ysZboCJcX7pUz5s5ihtXqFEUOfoUHmTJNeUWWgK cOYkG3QgbP4GEMHbAyrihBOKeaQwRivYy+GQ9hQoQvTNA2Zgqy5S624R3c31p1Ii05// rr9qXjMjwUiWmzIL9wXJU7CMGaKRoNTVL5QcZ99ltWboz4a2kTTJdGnNrOAnDKbettaE ayus0faTfnlHdrOd/xeVysYIyhg1u1UEo1wh0UwJkoRORBYhm2ZUEqHEF/zDp/tA17RF yeVXqfBax8c09ssXgHgq2jfYM2cLhsizXzYbWs8zPPGsdVbJVy8XThz9CGjK+5I3P1tH s8Ag== ARC-Authentication-Results: i=1; mx.google.com; dkim=fail header.i=@infradead.org header.s=bombadil.20170209 header.b=tTKvxXx1; 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 p13si14839541plo.267.2019.09.03.06.51.13; Tue, 03 Sep 2019 06:51:33 -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=bombadil.20170209 header.b=tTKvxXx1; 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 S1729295AbfICNuZ (ORCPT + 99 others); Tue, 3 Sep 2019 09:50:25 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:38396 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728679AbfICNuZ (ORCPT ); Tue, 3 Sep 2019 09:50:25 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.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=qAvvvTd/kG24q/y3ajQFQZLkXwSn6IFFif86NAbeoXA=; b=tTKvxXx15sgkgyowmyu2biBee jd97cdn7jtEzlUV8Y2AJ9nKvpEci1B2v5YXfCWKmEOF1HzgR/Tp8B3bJ22mEoFHrhJNqIOA2uqYUe kCdaddNGAShMcg8n7+w97paoSFHWSzDlOhLBNg3G7A1t5B0/A9HOXHynLh0ew/QOdi32UT6BNIAQV n4yv5lJrxW2kDyJhXCQ8t/qYrq5YzdGiEtxe63iqZYf0DAPCU7N39qKuFkDeALYtXZKmB8c8b2ogE 0SzGFHlclZbnfFP8QviIpGO4kVvlGnaEyyzmAt6mZKz64bexoz6sbREJcdFRfhUCQhcxvCOVPUr2e TIw42cing==; Received: from hch by bombadil.infradead.org with local (Exim 4.92 #3 (Red Hat Linux)) id 1i59CS-0003Rw-6p; Tue, 03 Sep 2019 13:50:24 +0000 Date: Tue, 3 Sep 2019 06:50:24 -0700 From: Christoph Hellwig To: Al Viro Cc: Christoph Hellwig , Qian Cai , linux-fsdevel@vger.kernel.org, LKML Subject: Re: "fs/namei.c: keep track of nd->root refcount status" causes boot panic Message-ID: <20190903135024.GA8274@infradead.org> References: <7C6CCE98-1E22-433C-BF70-A3CBCDED4635@lca.pw> <20190903123719.GF1131@ZenIV.linux.org.uk> <20190903130456.GA9567@infradead.org> <20190903134832.GH1131@ZenIV.linux.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190903134832.GH1131@ZenIV.linux.org.uk> User-Agent: Mutt/1.11.4 (2019-03-13) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Sep 03, 2019 at 02:48:32PM +0100, Al Viro wrote: > Not sure what would be the best way to do it... I don't mind breaking > the out-of-tree modules, whatever their license is; what I would rather > avoid is _quiet_ breaking of such. Any out of tree module running against an upstream kernel will need a recompile for a new version anyway. So I would not worry about it at all.