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authorKevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>2020-06-29 19:52:10 +0100
committerKevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>2020-06-30 09:34:24 +0100
commit77cd8f64ca261bfb3cf5a905fb2f227981934613 (patch)
tree9b7be8cb8285b4ed43886ca179039ace1017bf68 /target
parent4ca4c942679a3f19c9bc588ce40079886a528538 (diff)
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kernel: cake: backport unused var patch to 5.4
This was backported to 4.19 and I clearly expected it to land in 5.4 but it didn't (5.5) so backport it to 5.4 for consistency. Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
Diffstat (limited to 'target')
-rw-r--r--target/linux/generic/backport-4.19/393-v5.5-sch_cake-drop-unused-variable-tin_quantum_prio.patch (renamed from target/linux/generic/backport-4.19/393-v5.4-sch_cake-drop-unused-variable-tin_quantum_prio.patch)0
-rw-r--r--target/linux/generic/backport-5.4/393-v5.5-sch_cake-drop-unused-variable-tin_quantum_prio.patch158
2 files changed, 158 insertions, 0 deletions
diff --git a/target/linux/generic/backport-4.19/393-v5.4-sch_cake-drop-unused-variable-tin_quantum_prio.patch b/target/linux/generic/backport-4.19/393-v5.5-sch_cake-drop-unused-variable-tin_quantum_prio.patch
index 33e5c54b8c..33e5c54b8c 100644
--- a/target/linux/generic/backport-4.19/393-v5.4-sch_cake-drop-unused-variable-tin_quantum_prio.patch
+++ b/target/linux/generic/backport-4.19/393-v5.5-sch_cake-drop-unused-variable-tin_quantum_prio.patch
diff --git a/target/linux/generic/backport-5.4/393-v5.5-sch_cake-drop-unused-variable-tin_quantum_prio.patch b/target/linux/generic/backport-5.4/393-v5.5-sch_cake-drop-unused-variable-tin_quantum_prio.patch
new file mode 100644
index 0000000000..33e5c54b8c
--- /dev/null
+++ b/target/linux/generic/backport-5.4/393-v5.5-sch_cake-drop-unused-variable-tin_quantum_prio.patch
@@ -0,0 +1,158 @@
+From d7e1738f0a0b0573ac93cf570ba3df9dee61b68e Mon Sep 17 00:00:00 2001
+From: Kevin 'ldir' Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
+Date: Wed, 18 Dec 2019 14:05:13 +0000
+Subject: [PATCH 2/2] sch_cake: drop unused variable tin_quantum_prio
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+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>
+---
+ net/sched/sch_cake.c | 59 ++++++++++++++------------------------------
+ 1 file changed, 18 insertions(+), 41 deletions(-)
+
+--- a/net/sched/sch_cake.c
++++ b/net/sched/sch_cake.c
+@@ -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;
+@@ -1916,7 +1915,7 @@ 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;
+
+@@ -2237,8 +2236,7 @@ static int cake_config_besteffort(struct
+
+ 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;
+ }
+@@ -2249,8 +2247,7 @@ static int cake_config_precedence(struct
+ 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;
+@@ -2263,18 +2260,14 @@ static int cake_config_precedence(struct
+ 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;
+@@ -2343,8 +2336,7 @@ static int cake_config_diffserv8(struct
+ 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;
+@@ -2360,18 +2352,14 @@ static int cake_config_diffserv8(struct
+ 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;
+@@ -2410,17 +2398,11 @@ static int cake_config_diffserv4(struct
+ 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;
+ }
+@@ -2451,15 +2433,10 @@ static int cake_config_diffserv3(struct
+ 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;
+ }