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Message-ID: <20191217214554.27435-1-ldir@darbyshire-bryant.me.uk>
Date: Tue, 17 Dec 2019 21:46:21 +0000
From: Kevin 'ldir' Darbyshire-Bryant <ldir@...byshire-bryant.me.uk>
To: "netdev@...r.kernel.org" <netdev@...r.kernel.org>
CC: Kevin 'ldir' Darbyshire-Bryant <ldir@...byshire-bryant.me.uk>
Subject: [PATCH net-next v1] sch_cake: drop unused variable tin_quantum_prio
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.
Signed-off-by: Kevin Darbyshire-Bryant <ldir@...byshire-bryant.me.uk>
---
net/sched/sch_cake.c | 35 ++++++-----------------------------
1 file changed, 6 insertions(+), 29 deletions(-)
diff --git a/net/sched/sch_cake.c b/net/sched/sch_cake.c
index 53a80bc6b13a..170320932d10 100644
--- a/net/sched/sch_cake.c
+++ b/net/sched/sch_cake.c
@@ -173,7 +173,6 @@ struct cake_tin_data {
u64 tin_rate_bps;
u16 tin_rate_shft;
- u16 tin_quantum_prio;
u16 tin_quantum_band;
s32 tin_deficit;
u32 tin_backlog;
@@ -2241,7 +2240,6 @@ 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;
return 0;
}
@@ -2253,7 +2251,6 @@ static int cake_config_precedence(struct Qdisc *sch)
u32 mtu = psched_mtu(qdisc_dev(sch));
u64 rate = q->rate_bps;
u32 quantum1 = 256;
- u32 quantum2 = 256;
u32 i;
q->tin_cnt = 8;
@@ -2266,18 +2263,14 @@ 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_band = max_t(u16, 1U, quantum1);
/* calculate next class's parameters */
rate *= 7;
rate >>= 3;
- quantum1 *= 3;
- quantum1 >>= 1;
-
- quantum2 *= 7;
- quantum2 >>= 3;
+ quantum1 *= 7;
+ quantum1 >>= 3;
}
return 0;
@@ -2347,7 +2340,6 @@ static int cake_config_diffserv8(struct Qdisc *sch)
u32 mtu = psched_mtu(qdisc_dev(sch));
u64 rate = q->rate_bps;
u32 quantum1 = 256;
- u32 quantum2 = 256;
u32 i;
q->tin_cnt = 8;
@@ -2363,18 +2355,14 @@ 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_band = max_t(u16, 1U, quantum1);
/* calculate next class's parameters */
rate *= 7;
rate >>= 3;
- quantum1 *= 3;
- quantum1 >>= 1;
-
- quantum2 *= 7;
- quantum2 >>= 3;
+ quantum1 *= 7;
+ quantum1 >>= 3;
}
return 0;
@@ -2413,12 +2401,6 @@ 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;
@@ -2454,11 +2436,6 @@ 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;
--
2.21.0 (Apple Git-122.2)
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