>>  > > arch/alpha/a12/if_xb.c:779:     bpfattach(&xbi, DLT_NULL, 0);
>>  > 
>>  > This one is interesting.  This is an ethernet driver ?
>> 
>> No, xb is the crossbar used for inter-node communication on the Avalon
>> Computer Systems A12 supercomputer.
>
>Ok.  Where does bpf_*tap() get called for this ?

line 779 of arch/alpha/a12/if_xb.c, obviously.  i think a better
question would be why.  :)

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