Man page 9 : __dev_remove_pack

__dev_remove_pack - remove packet handler

void __dev_remove_pack(struct packet_type *  pt );

pt
    packet type declaration

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.

The packet type might still be in use by receivers and must not be freed until after all the CPUAqs have gone through a quiescent state.