Liav A a43133b3c7 Kernel: Hold a weak reference to a Process object in AsyncDeviceRequest ...

The process could be long gone by the point the async IO request has
completed so hold a weak reference pointer to the requesting Process and
try get a strong reference only when needed.

This patch is necessary because otherwise async IO requests can hold
Process objects long after they were terminated, which would make it
impossible to perform certain tasks in the system, like killing all user
processes during the shutdown procedure.

2023-08-20 13:04:42 -06:00

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