[PATCH v7 2/6] server: Allow volume information queries to be asynchronous

[Erich E. Hoover]

This patch allows the volume information queries to be asynchronous on
the server side.

v7: use force_blocking in async_handoff and fix spacing
v6: No change
v5: No change
v4: Split content from server/device.c and
dlls/ntoskrnl.exe/ntoskrnl.c and moved to patch 4
v3: No change
v2: Split

Best,
Erich