When playing with openwrt build system, i found hotplug2 module, the comment says :
Hotplug2 is a trivial replacement of some of the UDev functionality │
in a tiny pack, intended for Linux early userspace: Init RAM FS and InitRD. │
http://isteve.bofh.cz/~isteve/hotplug2/ Symbol: PACKAGE_hotplug2 [=y]
Prompt: hotplug2…….. Dynamic device management subsystem for embedded systems
Defined at tmp/.config-package.in:602
Honestly, i don’t know much about udev it self, but i will lear more about it, i just curious , if the cause of failed dm-crypt functionalities is related to udev or not ?