Changes in vm_operations_struct 2.2.x => 2.4.x

[Martin Maletinsky <maletinsky@scs.ch>]

Hi,

Playing around with kernel memory allocated by a module and mmap()ed by a user space process, I noticed that in the 2.4.x kernel many of the 2.2.x vm_operation_struct
fields have gone. In particular there is no unmap operation any more. Is there any way for a driver to get notified when the user space process mapping memory exported by
the driver unmaps parts of that memory (as far as I know, the close operation is invoked when the entire memory is unmapped)? Does anyone know the reason why the number of
operations in vm_operation_struct has been reduced?

regards
Martin

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