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=-5.0 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham 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 3637FC7618B for ; Fri, 26 Jul 2019 06:26:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 08AD1217D4 for ; Fri, 26 Jul 2019 06:26:09 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="ILMJwpgx"; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="YVML3e72" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725786AbfGZG0I (ORCPT ); Fri, 26 Jul 2019 02:26:08 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:58238 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725864AbfGZG0I (ORCPT ); Fri, 26 Jul 2019 02:26:08 -0400 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 744C960734; Fri, 26 Jul 2019 06:26:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1564122367; bh=EbZ8V/DEcs0/4znrzggpjMRyIZLsE99CLDSEHMkEF4I=; h=Subject:From:To:References:Date:In-Reply-To:From; b=ILMJwpgxOLX2eMtgJTBQuce8DNgvDGeX8Fpm10eLZD/HdmUS6W7P5UmYjWbBn+lB5 9x5adW3YYsZJNHhwCWsJoGNXroy9T3LjqHvpYuXQBCOMl04rizdTfcfLwl6zaV+1lE zPPL4WGu+uPtys7m3XY8alF5gSFavlvz8jUpNWxc= Received: from [10.79.136.27] (blr-bdr-fw-01_globalnat_allzones-outside.qualcomm.com [103.229.18.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: saiprakash.ranjan@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id A593F6053D; Fri, 26 Jul 2019 06:26:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1564122366; bh=EbZ8V/DEcs0/4znrzggpjMRyIZLsE99CLDSEHMkEF4I=; h=Subject:From:To:References:Date:In-Reply-To:From; b=YVML3e72rFVZFteKr7KSCTHnPOEip/doe8dq52LfuNF0h09sTjHTNdY8LRGHJr5du IpC5CaBa1tdz1E27R+2F5JPQCn14DLCYEfJ5Pcuk+ltSTL/tIfGwj5CPyrzMDiil2W +1iCSORfJnl6EKLMKJuw5+TZU6va8B3Z60s68SpI= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org A593F6053D Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=saiprakash.ranjan@codeaurora.org Subject: Re: [Regression] Missing device nodes for ETR, ETF and STM after CONFIG_UEVENT_HELPER=n From: Sai Prakash Ranjan To: Geert Uytterhoeven , Greg Kroah-Hartman , Mathieu Poirier , Suzuki K Poulose , Leo Yan , linux-arm-msm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org References: Message-ID: Date: Fri, 26 Jul 2019 11:56:02 +0530 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org On 7/26/2019 11:49 AM, Sai Prakash Ranjan wrote: > Hi, > > When trying to test my coresight patches, I found that etr,etf and stm > device nodes are missing from /dev. > > Bisection gives this as the bad commit. > > 1be01d4a57142ded23bdb9e0c8d9369e693b26cc is the first bad commit > commit 1be01d4a57142ded23bdb9e0c8d9369e693b26cc > Author: Geert Uytterhoeven > Date:   Thu Mar 14 12:13:50 2019 +0100 > >     driver: base: Disable CONFIG_UEVENT_HELPER by default > >     Since commit 7934779a69f1184f ("Driver-Core: disable /sbin/hotplug by >     default"), the help text for the /sbin/hotplug fork-bomb says >     "This should not be used today [...] creates a high system load, or >     [...] out-of-memory situations during bootup".  The rationale for this >     was that no recent mainstream system used this anymore (in 2010!). > >     A few years later, the complete uevent helper support was made > optional >     in commit 86d56134f1b67d0c ("kobject: Make support for uevent_helper >     optional.").  However, if was still left enabled by default, to > support >     ancient userland. > >     Time passed by, and nothing should use this anymore, so it can be >     disabled by default. > >     Signed-off-by: Geert Uytterhoeven >     Signed-off-by: Greg Kroah-Hartman > >  drivers/base/Kconfig | 1 - >  1 file changed, 1 deletion(-) > > FYI, I am testing on linux-next. Thanks, Sai -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation