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net: openvswitch: simplify the flow_hash

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Simplify the code and remove the unnecessary BUILD_BUG_ON.

Signed-off-by: Tonghao Zhang <xiangxia.m.yue@gmail.com>
Tested-by: Greg Rose <gvrose8192@gmail.com>
Acked-by: William Tu <u9012063@gmail.com>
Acked-by: Pravin B Shelar <pshelar@ovn.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tonghao Zhang 2019-11-01 22:23:50 +08:00 committed by David S. Miller
parent 57f7d7b916
commit 515b65a4b9
1 changed files with 2 additions and 5 deletions
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net/openvswitch/flow_table.c
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@ -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);
}