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=-2.2 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,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 CDF70C7618B for ; Fri, 26 Jul 2019 11:43:41 +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 A2EA5229F3 for ; Fri, 26 Jul 2019 11:43:41 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="DtWd9+oP"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="2agoaOv3" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A2EA5229F3 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linuxfoundation.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=DAybIpyiE1q769QZEI+HXfzw6+jE0gW5G45UA3YmZBM=; b=DtWd9+oP5NUEAx hbNrMwGvhuWL0qugu+x+tOhIAP1KCyLfFumoNWuOgbHDhNI3/LdAxPXTH8x7QvcIcni1bsz2LXO/P xuxxSs3/rhgaZUhcEyDX2EN96Cf2j9cIEkf2YUCZngO1Hhlqt0Vpd5qB8qpBEA8aSvfVmMR1bFJ8Y /7g3fxFut5Lw+8PE17TLzTRia/5xh6UIDugiCu+aeJJelB39rWMw/7+hhP3AtF4GcHcsjWOZuxbBX KXXk0UHlXXgetzYgNhFtpIz5ENugtRZPKGbpMAxWbpsVFSuCpVV7QKAE6qb1s+x9Vj4HzjF+JjVdn jNHYydfW4Um2k9f70SYQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hqydJ-0001Gc-V5; Fri, 26 Jul 2019 11:43:33 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1hqydF-0001GE-V7 for linux-arm-kernel@lists.infradead.org; Fri, 26 Jul 2019 11:43:31 +0000 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (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 69DED229F3; Fri, 26 Jul 2019 11:43:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1564141408; bh=5yhEY4/CW3iFSx6x2N72Exb83PWgWW4WYbcupxxH+EQ=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=2agoaOv3lpVGYhSQxrkRuDOARn2KEXJcqmDa7xybgtHiM6/IJNjdpLnyRHt7Aubtc X8i7PeL0fMglVJ+kGD7HlNNxki0h00bW92TbkewMZwyidxTXpksfKgvJIVrarwrs/f 4bwd5fiplYiGBI4MZPkaodlW/in25rCAMv7VrmOs= Date: Fri, 26 Jul 2019 13:43:25 +0200 From: Greg Kroah-Hartman To: Thomas Petazzoni Subject: Re: [Regression] Missing device nodes for ETR, ETF and STM after CONFIG_UEVENT_HELPER=n Message-ID: <20190726114325.GA18727@kroah.com> References: <20190726070429.GA15714@kroah.com> <165028a7-ff12-dd28-cc4c-57a3961dbb40@codeaurora.org> <20190726084127.GA28470@kroah.com> <097942a1-6914-2542-450f-65a6147dc7aa@codeaurora.org> <6d48f996-6297-dc69-250b-790be6d2670c@codeaurora.org> <20190726101925.GA22476@kroah.com> <20190726133316.688a43d8@windsurf> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20190726133316.688a43d8@windsurf> User-Agent: Mutt/1.12.1 (2019-06-15) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190726_044330_021685_622966A7 X-CRM114-Status: GOOD ( 13.43 ) 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: Sai Prakash Ranjan , Geert Uytterhoeven , Mathieu Poirier , Suzuki K Poulose , linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, Leo Yan , 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 Fri, Jul 26, 2019 at 01:33:16PM +0200, Thomas Petazzoni wrote: > Hello, > > On Fri, 26 Jul 2019 12:19:25 +0200 > Greg Kroah-Hartman wrote: > > > > This somehow is not mounting etr, etf, stm devices when uevent-helper is > > > disabled. Anyways as Suzuki mentioned, using devtmpfs does fix the issue. > > > > Last I looked (many years ago) mdev requires uevent-helper in order for > > it to work. I recommend that if you rely on mdev to keep that option > > enabled, or to just use devtmpfs and udev :) > > Since Busybox 1.31.0, mdev has gained a daemon mode. In this mode, mdev > runs in the background, and receives uevent through a netlink socket. > So there's been some changes in how Busybox mdev works in recent times. Ideally mdev should switch to what udev did many many years ago and not do any device node creations and just leave all of that up to devtmpfs. Then it can just stick to any symlinks and any specific owner:group permissions that might be wanted separate from the default ones the kernel provides. Makes things much simpler and should save a lot of userspace code, making mdev even smaller. thanks, greg k-h _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel