Spencer Dixon 27bfb01f25 Kernel: Fix ProcFS for non-process backed sub dirs ...

While hacking on `sysctl` an issue in ProcFS was making me unable to
read/write from `/proc/sys/XXX`. Some directories in the ProcFS are not
actually backed by a process and need to return `nullptr` so callbacks
get properly set. We now do an explicit check for the parent to ensure
it's one that is PID-based.

2021-05-02 19:21:42 +02:00

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