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Message-ID: <e3a01f7e-9662-415d-1e3d-df3734d3e305@codeaurora.org>
Date: Fri, 26 Jul 2019 11:56:02 +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: Re: [Regression] Missing device nodes for ETR, ETF and STM after
CONFIG_UEVENT_HELPER=n
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 <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(-)
>
>
FYI, I am testing on linux-next.
Thanks,
Sai
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