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Message-ID: <cfe09a46-462f-633a-37c2-52f8bfc0ffb2@codeaurora.org>
Date:   Fri, 26 Jul 2019 11:49:19 +0530
From:   Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>
To:     Geert Uytterhoeven <geert+renesas@...der.be>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Leo Yan <leo.yan@...aro.org>, linux-arm-msm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [Regression] Missing device nodes for ETR, ETF and STM after
 CONFIG_UEVENT_HELPER=n

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 <geert+renesas@...der.be>
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 <geert+renesas@...der.be>
     Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

  drivers/base/Kconfig | 1 -
  1 file changed, 1 deletion(-)


Any idea on this?

-Sai

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QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
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