Jesper,

Sorry, it seems that I accidentally sent out an unfinished e-mail.

>I don't think your patch should contain this cleanup of "b4".

It seems that b3 is only used for the legacy overhead part and if I remove it, 
b3 is not going to be used. So I figured I remove b4 put b3 instead.

administrator@ubuntu:~/src/iproute2/tc$ git rev-parse HEAD
654ae881de57467642c8c2ed16ffc3a8d57fafa2

administrator@ubuntu:~/src/iproute2/tc$ grep -nHP -B 3 'b3' q_htb.c
q_htb.c-273-    __u64 rate64, ceil64;
q_htb.c-274-    SPRINT_BUF(b1);
q_htb.c-275-    SPRINT_BUF(b2);
q_htb.c:276:    SPRINT_BUF(b3);
--
q_htb.c-317-                            sprint_size(buffer, b1),
q_htb.c-318-                            1<<hopt->rate.cell_log,
q_htb.c-319-                            sprint_size(hopt->rate.mpu&0xFF, b2),
q_htb.c:320:                            sprint_size((hopt->rate.mpu>>8)&0xFF, 
b3));
--
q_htb.c-322-                            sprint_size(cbuffer, b1),
q_htb.c-323-                            1<<hopt->ceil.cell_log,
q_htb.c-324-                            sprint_size(hopt->ceil.mpu&0xFF, b2),
q_htb.c:325:                            sprint_size((hopt->ceil.mpu>>8)&0xFF, 
b3));
administrator@ubuntu:~/src/iproute2/tc$ grep -nHP -B 3 'b4' q_htb.c
q_htb.c-274-    SPRINT_BUF(b1);
q_htb.c-275-    SPRINT_BUF(b2);
q_htb.c-276-    SPRINT_BUF(b3);
q_htb.c:277:    SPRINT_BUF(b4);
--
q_htb.c-311-            cbuffer = tc_calc_xmitsize(ceil64, hopt->cbuffer);
q_htb.c-312-            linklayer = (hopt->rate.linklayer & TC_LINKLAYER_MASK);
q_htb.c-313-            if (linklayer > TC_LINKLAYER_ETHERNET || show_details)
q_htb.c:314:                    fprintf(f, "linklayer %s ", 
sprint_linklayer(linklayer, b4));

Thanks,
Dima
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