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[net-next,v3,06/10] net: openvswitch: simplify the flow_hash

Message ID 1570802447-8019-7-git-send-email-xiangxia.m.yue@gmail.com
State Changes Requested
Delegated to: David Miller
Headers show
Series optimize openvswitch flow looking up | expand

Commit Message

Tonghao Zhang Oct. 11, 2019, 2 p.m. UTC 
From: Tonghao Zhang <xiangxia.m.yue@gmail.com>

Simplify the code and remove the unnecessary BUILD_BUG_ON.

Signed-off-by: Tonghao Zhang <xiangxia.m.yue@gmail.com>
---
 net/openvswitch/flow_table.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)
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Patch

diff --git a/net/openvswitch/flow_table.c b/net/openvswitch/flow_table.c
index 1b99f8e..7aba5b4 100644
--- a/net/openvswitch/flow_table.c
+++ b/net/openvswitch/flow_table.c
@@ -430,13 +430,9 @@  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);
 }