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| author | Li RongQing <lirongqing@baidu.com> | 2018-08-03 15:50:02 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-08-04 13:15:11 -0700 |
| commit | f13b546847ff5862ea313f3e79010c52c3fe32b4 (patch) | |
| tree | 301dbbe983a0e3c3b750e084e1face19a655cd78 /drivers/net/tun.c | |
| parent | 039b1d5e5862375b0da534bb75fc580eaa547d53 (diff) | |
| download | linux-f13b546847ff5862ea313f3e79010c52c3fe32b4.tar.bz2 | |
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>
Diffstat (limited to 'drivers/net/tun.c')
| -rw-r--r-- | drivers/net/tun.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/net/tun.c b/drivers/net/tun.c index 0a3134712652..2bbefe828670 100644 --- a/drivers/net/tun.c +++ b/drivers/net/tun.c @@ -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) |