[OpenWrt-Devel] [PATCH] mediatek: remove duplicate RPS patch

[Koen Vandeputte]

Commit 7af1fb9faafb ("kernel: add a RPS balancer") introduces a RPS balancer
for all targets.

In the past however, this patch was already introduced for target "mediatek"
in commit 7762c07c8898 ("mediatek: bump to v4.14")

Remove the separate copy of the patch within the mediatek target,
which otherwise is applied twice and results in a build error.

Fixes: 7af1fb9faafb ("kernel: add a RPS balancer")

Signed-off-by: Koen Vandeputte <koen.vandeputte at ncentric.com>
---
 .../0048-net-core-add-RPS-balancer.patch      | 90 -------------------
 1 file changed, 90 deletions(-)
 delete mode 100644 target/linux/mediatek/patches-4.14/0048-net-core-add-RPS-balancer.patch

diff --git a/target/linux/mediatek/patches-4.14/0048-net-core-add-RPS-balancer.patch b/target/linux/mediatek/patches-4.14/0048-net-core-add-RPS-balancer.patch
deleted file mode 100644
index 6cb5fa74955b..000000000000
--- a/target/linux/mediatek/patches-4.14/0048-net-core-add-RPS-balancer.patch
+++ /dev/null
@@ -1,90 +0,0 @@
-From 3e969c9695b45e1a052d43b367096ec99f2f0aac Mon Sep 17 00:00:00 2001
-From: John Crispin <john at phrozen.org>
-Date: Thu, 10 Aug 2017 15:58:29 +0200
-Subject: [PATCH 48/57] net: core: add RPS balancer
-
-Signed-off-by: John Crispin <john at phrozen.org>
----
- net/core/dev.c | 57 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
- 1 file changed, 56 insertions(+), 1 deletion(-)
-
---- a/net/core/dev.c
-+++ b/net/core/dev.c
-@@ -3636,6 +3636,58 @@ set_rps_cpu(struct net_device *dev, stru
- 	return rflow;
- }
- 
-+#define RPS_TBL_SIZE_SHIFT	10
-+#define RPS_TBL_SIZE		(1 << RPS_TBL_SIZE_SHIFT)
-+struct rps_table {
-+	int			core;
-+	struct timer_list	expire;
-+};
-+static struct rps_table rps_table[RPS_TBL_SIZE];
-+static int rps_table_last_core;
-+
-+static void rps_table_expire(unsigned long data)
-+{
-+	struct rps_table *entry = (struct rps_table *) data;
-+
-+	entry->core = -1;
-+}
-+
-+static int rps_table_core(struct rps_map *map)
-+{
-+	int i;
-+
-+	for (i = 0; i < map->len; i++) {
-+		int cpu = map->cpus[(rps_table_last_core + i + 1) % map->len];
-+		if (cpu_online(cpu)) {
-+			rps_table_last_core = cpu;
-+			return cpu;
-+		}
-+	}
-+	return map->cpus[0];
-+}
-+
-+static int rps_table_lookup(struct rps_map *map, u32 hash)
-+{
-+	int bucket = hash & 0x3ff;
-+
-+	if (rps_table[bucket].core < 0)
-+		rps_table[bucket].core = rps_table_core(map);
-+	mod_timer(&rps_table[bucket].expire, jiffies + HZ);
-+
-+	return rps_table[bucket].core;
-+}
-+
-+static void rps_table_init(void)
-+{
-+	int i;
-+
-+	for (i = 0; i < RPS_TBL_SIZE; i++) {
-+		rps_table[i].core = -1;
-+		setup_timer(&rps_table[i].expire, rps_table_expire,
-+			    (unsigned long) &rps_table[i]);
-+	}
-+}
-+
- /*
-  * get_rps_cpu is called from netif_receive_skb and returns the target
-  * CPU from the RPS map of the receiving queue for a given skb.
-@@ -3725,7 +3777,7 @@ static int get_rps_cpu(struct net_device
- try_rps:
- 
- 	if (map) {
--		tcpu = map->cpus[reciprocal_scale(hash, map->len)];
-+		tcpu = rps_table_lookup(map, hash);
- 		if (cpu_online(tcpu)) {
- 			cpu = tcpu;
- 			goto done;
-@@ -8810,6 +8862,9 @@ static int __init net_dev_init(void)
- 		sd->backlog.weight = weight_p;
- 	}
- 
-+	if (IS_ENABLED(CONFIG_RPS))
-+		rps_table_init();
-+
- 	dev_boot_phase = 0;
- 
- 	/* The loopback device is special if any other network devices
-- 
2.17.1


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