// ntddk.h
NTSTATUS MmUnmapViewInSystemSpace(
PVOID MappedBase
);
View the official Windows Driver Kit DDI referenceNo description available.
The MmUnmapViewInSystemSpace function unmaps the specified section from the system's address space.
MappedBaseSupplies the address of the view to unmap.
This function returns true if the map view operation was successful.