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sch_cake: drop unused variable tin_quantum_prio

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Turns out tin_quantum_prio isn't used anymore and is a leftover from a
previous implementation of diffserv tins.  Since the variable isn't used
in any calculations it can be eliminated.

Drop variable and places where it was set.  Rename remaining variable
and consolidate naming of intermediate variables that set it.

Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
Acked-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Kevin 'ldir' Darbyshire-Bryant 2019-12-18 14:05:13 +00:00 committed by David S. Miller
parent dcbe4e9575
commit cbd22f172d
1 changed files with 18 additions and 41 deletions
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59
net/sched/sch_cake.c
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@ -173,8 +173,7 @@ struct cake_tin_data {
u64 tin_rate_bps;
u16 tin_rate_shft;
u16 tin_quantum_prio;
u16 tin_quantum_band;
u16 tin_quantum;
s32 tin_deficit;
u32 tin_backlog;
u32 tin_dropped;
@ -1919,7 +1918,7 @@ begin:
while (b->tin_deficit < 0 ||
!(b->sparse_flow_count + b->bulk_flow_count)) {
if (b->tin_deficit <= 0)
b->tin_deficit += b->tin_quantum_band;
b->tin_deficit += b->tin_quantum;
if (b->sparse_flow_count + b->bulk_flow_count)
empty = false;
@ -2241,8 +2240,7 @@ static int cake_config_besteffort(struct Qdisc *sch)
cake_set_rate(b, rate, mtu,
us_to_ns(q->target), us_to_ns(q->interval));
b->tin_quantum_band = 65535;
b->tin_quantum_prio = 65535;
b->tin_quantum = 65535;
return 0;
}
@ -2253,8 +2251,7 @@ static int cake_config_precedence(struct Qdisc *sch)
struct cake_sched_data *q = qdisc_priv(sch);
u32 mtu = psched_mtu(qdisc_dev(sch));
u64 rate = q->rate_bps;
u32 quantum1 = 256;
u32 quantum2 = 256;
u32 quantum = 256;
u32 i;
q->tin_cnt = 8;
@ -2267,18 +2264,14 @@ static int cake_config_precedence(struct Qdisc *sch)
cake_set_rate(b, rate, mtu, us_to_ns(q->target),
us_to_ns(q->interval));
b->tin_quantum_prio = max_t(u16, 1U, quantum1);
b->tin_quantum_band = max_t(u16, 1U, quantum2);
b->tin_quantum = max_t(u16, 1U, quantum);
/* calculate next class's parameters */
rate *= 7;
rate >>= 3;
quantum1 *= 3;
quantum1 >>= 1;
quantum2 *= 7;
quantum2 >>= 3;
quantum *= 7;
quantum >>= 3;
}
return 0;
@ -2347,8 +2340,7 @@ static int cake_config_diffserv8(struct Qdisc *sch)
struct cake_sched_data *q = qdisc_priv(sch);
u32 mtu = psched_mtu(qdisc_dev(sch));
u64 rate = q->rate_bps;
u32 quantum1 = 256;
u32 quantum2 = 256;
u32 quantum = 256;
u32 i;
q->tin_cnt = 8;
@ -2364,18 +2356,14 @@ static int cake_config_diffserv8(struct Qdisc *sch)
cake_set_rate(b, rate, mtu, us_to_ns(q->target),
us_to_ns(q->interval));
b->tin_quantum_prio = max_t(u16, 1U, quantum1);
b->tin_quantum_band = max_t(u16, 1U, quantum2);
b->tin_quantum = max_t(u16, 1U, quantum);
/* calculate next class's parameters */
rate *= 7;
rate >>= 3;
quantum1 *= 3;
quantum1 >>= 1;
quantum2 *= 7;
quantum2 >>= 3;
quantum *= 7;
quantum >>= 3;
}
return 0;
@ -2414,17 +2402,11 @@ static int cake_config_diffserv4(struct Qdisc *sch)
cake_set_rate(&q->tins[3], rate >> 2, mtu,
us_to_ns(q->target), us_to_ns(q->interval));
/* priority weights */
q->tins[0].tin_quantum_prio = quantum;
q->tins[1].tin_quantum_prio = quantum >> 4;
q->tins[2].tin_quantum_prio = quantum << 2;
q->tins[3].tin_quantum_prio = quantum << 4;
/* bandwidth-sharing weights */
q->tins[0].tin_quantum_band = quantum;
q->tins[1].tin_quantum_band = quantum >> 4;
q->tins[2].tin_quantum_band = quantum >> 1;
q->tins[3].tin_quantum_band = quantum >> 2;
q->tins[0].tin_quantum = quantum;
q->tins[1].tin_quantum = quantum >> 4;
q->tins[2].tin_quantum = quantum >> 1;
q->tins[3].tin_quantum = quantum >> 2;
return 0;
}
@ -2455,15 +2437,10 @@ static int cake_config_diffserv3(struct Qdisc *sch)
cake_set_rate(&q->tins[2], rate >> 2, mtu,
us_to_ns(q->target), us_to_ns(q->interval));
/* priority weights */
q->tins[0].tin_quantum_prio = quantum;
q->tins[1].tin_quantum_prio = quantum >> 4;
q->tins[2].tin_quantum_prio = quantum << 4;
/* bandwidth-sharing weights */
q->tins[0].tin_quantum_band = quantum;
q->tins[1].tin_quantum_band = quantum >> 4;
q->tins[2].tin_quantum_band = quantum >> 2;
q->tins[0].tin_quantum = quantum;
q->tins[1].tin_quantum = quantum >> 4;
q->tins[2].tin_quantum = quantum >> 2;
return 0;
}