DVB Loopback – 08/04/2008
Incorporated into open-sasc-ng r25 on 08/05/2008
* Fix missing up() semaphore in filemap error path
* Add missing error check in filemap error path
* Module reference counting, prevents module from being unloaded when device is in use, which in turn prevents kernel oops.
* Convert semaphores to mutexes, as semaphores are being used as mutexes here.
* Correct minor whitespace issues in code
* Convert dvblb_global from vmalloc to kmalloc
