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tun: not use hardcoded mask value 

0x3ff in tun_hashfn is mask of TUN_NUM_FLOW_ENTRIES, instead
of hardcode, define a macro to setup the relationship with
TUN_NUM_FLOW_ENTRIES

Signed-off-by: Li RongQing <lirongqing@baidu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Li RongQing 2018-08-03 15:50:02 +08:00 committed by David S. Miller
parent 039b1d5e58
commit f13b546847
1 changed files with 2 additions and 1 deletions
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3
drivers/net/tun.c
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@ -200,6 +200,7 @@ struct tun_flow_entry {
};
#define TUN_NUM_FLOW_ENTRIES 1024
#define TUN_MASK_FLOW_ENTRIES (TUN_NUM_FLOW_ENTRIES - 1)
struct tun_prog {
struct rcu_head rcu;
@ -406,7 +407,7 @@ static inline __virtio16 cpu_to_tun16(struct tun_struct *tun, u16 val)
static inline u32 tun_hashfn(u32 rxhash)
{
return rxhash & 0x3ff;
return rxhash & TUN_MASK_FLOW_ENTRIES;
}
static struct tun_flow_entry *tun_flow_find(struct hlist_head *head, u32 rxhash)