netdev - [PATCH net-next v6 06/10] net: openvswitch: simplify the flow

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Message-Id: <1572618234-6904-7-git-send-email-xiangxia.m.yue@gmail.com>
Date:   Fri,  1 Nov 2019 22:23:50 +0800
From:   xiangxia.m.yue@...il.com
To:     gvrose8192@...il.com, pshelar@....org, davem@...emloft.net
Cc:     netdev@...r.kernel.org, dev@...nvswitch.org,
        Tonghao Zhang <xiangxia.m.yue@...il.com>
Subject: [PATCH net-next v6 06/10] net: openvswitch: simplify the flow_hash

From: Tonghao Zhang <xiangxia.m.yue@...il.com>

Simplify the code and remove the unnecessary BUILD_BUG_ON.

Signed-off-by: Tonghao Zhang <xiangxia.m.yue@...il.com>
Tested-by: Greg Rose <gvrose8192@...il.com>
Acked-by: William Tu <u9012063@...il.com>
---
 net/openvswitch/flow_table.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/net/openvswitch/flow_table.c b/net/openvswitch/flow_table.c
index a10d421..96757e2 100644
--- a/net/openvswitch/flow_table.c
+++ b/net/openvswitch/flow_table.c
@@ -432,13 +432,10 @@ int ovs_flow_tbl_flush(struct flow_table *flow_table)
 static u32 flow_hash(const struct sw_flow_key *key,
 		     const struct sw_flow_key_range *range)
 {
-	int key_start = range->start;
-	int key_end = range->end;
-	const u32 *hash_key = (const u32 *)((const u8 *)key + key_start);
-	int hash_u32s = (key_end - key_start) >> 2;
+	const u32 *hash_key = (const u32 *)((const u8 *)key + range->start);
 
 	/* Make sure number of hash bytes are multiple of u32. */
-	BUILD_BUG_ON(sizeof(long) % sizeof(u32));
+	int hash_u32s = range_n_bytes(range) >> 2;
 
 	return jhash2(hash_key, hash_u32s, 0);
 }
-- 
1.8.3.1