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_2 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 85F32C7618B for ; Fri, 26 Jul 2019 11:33:34 +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 54696216C8 for ; Fri, 26 Jul 2019 11:33:34 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="DOtztIG4" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 54696216C8 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=bootlin.com 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:MIME-Version:References:In-Reply-To: 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=Ca+ewlbuyI0ZtiJCRpBmnroCo545me9iem7jn7f/k2s=; b=DOtztIG4IzlVem GNGqZlta6VyEa38JJZL8oqziywccSiWlMnxv92OPKXy/WzwONa+lt3P+2cvHVxBigEyCdSIYmF0Oj WiyuA08ZAwGjQ2Iapxtv4WkO2BA3AYnYWDSS7ftH8cS4ZwhFRGr8XlDkXpPzjkCI9EbDGQAFpw9js NHU0qXACHFPnOyhlPf2EFdVPXrB/K2tJErvLIxwVLNXPW4IE4/kKv+iDCqbLwpkPdiYurgGqgtv6G 0g1XSXe2o1gxlTrohNv2ia4Y3d/IBL5xwObg4eIoqik1YuHJEpfVnrWqamoqIwvXpgny6Q4TvrV+q Rp1QAjrvVb78gUfYs1sA==; 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 1hqyTd-0006KC-Kf; Fri, 26 Jul 2019 11:33:33 +0000 Received: from relay1-d.mail.gandi.net ([217.70.183.193]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1hqyTa-0006Jd-1D for linux-arm-kernel@lists.infradead.org; Fri, 26 Jul 2019 11:33:31 +0000 X-Originating-IP: 86.250.200.211 Received: from windsurf (lfbn-1-17395-211.w86-250.abo.wanadoo.fr [86.250.200.211]) (Authenticated sender: thomas.petazzoni@bootlin.com) by relay1-d.mail.gandi.net (Postfix) with ESMTPSA id ABC04240014; Fri, 26 Jul 2019 11:33:17 +0000 (UTC) Date: Fri, 26 Jul 2019 13:33:16 +0200 From: Thomas Petazzoni To: Greg Kroah-Hartman Subject: Re: [Regression] Missing device nodes for ETR, ETF and STM after CONFIG_UEVENT_HELPER=n Message-ID: <20190726133316.688a43d8@windsurf> In-Reply-To: <20190726101925.GA22476@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> Organization: Bootlin X-Mailer: Claws Mail 3.17.3 (GTK+ 2.24.32; x86_64-redhat-linux-gnu) MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190726_043330_226957_14780FA2 X-CRM114-Status: UNSURE ( 8.58 ) X-CRM114-Notice: Please train this message. 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 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. Best regards, Thomas -- Thomas Petazzoni, CTO, Bootlin Embedded Linux and Kernel engineering https://bootlin.com _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel