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- Do the ax25_list_lock, ax25_dev_lock, linkfail_lockreally, ax25_frag_lock and
- listen_lock have to be bh-safe?
- Do the netrom and rose locks have to be bh-safe?
- A device might be deleted after lookup in the SIOCADDRT ioctl but before it's
- being used.
- Routes to a device being taken down might be deleted by ax25_rt_device_down
- but added by somebody else before the device has been deleted fully.
- The ax25_rt_find_route synopsys is pervert but I somehow had to deal with
- the race caused by the static variable in it's previous implementation.
- Implement proper socket locking in netrom and rose.
- Check socket locking when ax25_rcv is sending to raw sockets. In particular
- ax25_send_to_raw() seems fishy. Heck - ax25_rcv is fishy.
- Handle XID and TEST frames properly.
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