kobject: Make support for uevent_helper optional.
Michael Marineau authored

Support for uevent_helper, aka hotplug, is not required on many systems
these days but it can still be enabled via sysfs or sysctl.
Reported-by: default avatarDarren Shepherd <darren.s.shepherd@gmail.com>
Signed-off-by: default avatarMichael Marineau <mike@marineau.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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