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SubjectRe: [Regression] Missing device nodes for ETR, ETF and STM after CONFIG_UEVENT_HELPER=n
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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@glider.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@glider.be>
>     Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
>
>  drivers/base/Kconfig | 1 -
>  1 file changed, 1 deletion(-)
>
>
FYI, I am testing on linux-next.

Thanks,
Sai

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