dev_remove_pack — remove packet handler
| void dev_remove_pack ( | struct packet_type * pt ); | 
   Remove a protocol handler that was previously added to the kernel
   protocol handlers by dev_add_pack. The passed packet_type is removed
   from the kernel lists and can be freed or reused once this function
   returns.
   
This call sleeps to guarantee that no CPU is looking at the packet type after return.