kmod-sched-cake: switch to in-tree cake for 4.19+

[openwrt/openwrt.git] / target / linux / generic / backport-4.19 / 395-v5.4-sch_cake-drop-unused-variable-tin_quantum_prio.patch

diff --git a/target/linux/generic/backport-4.19/395-v5.4-sch_cake-drop-unused-variable-tin_quantum_prio.patch b/target/linux/generic/backport-4.19/395-v5.4-sch_cake-drop-unused-variable-tin_quantum_prio.patch
new file mode 100644 (file)
index 0000000..33e5c54
--- /dev/null
+++ b/target/linux/generic/backport-4.19/395-v5.4-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;
+ }