diff options
| author | Antonio Quartulli <antonio@open-mesh.com> | 2013-10-13 02:50:17 +0200 |
|---|---|---|
| committer | Antonio Quartulli <antonio@meshcoding.com> | 2014-01-08 20:49:39 +0100 |
| commit | 3fba7325bb057977ec180b5f462084c50ca7940e (patch) | |
| tree | ffa321077c017256351bf2c8342e80267382244b /net/batman-adv/routing.c | |
| parent | a48bcacdb3b31816500d5732111241b705c4bc61 (diff) | |
| download | lwn-3fba7325bb057977ec180b5f462084c50ca7940e.tar.gz lwn-3fba7325bb057977ec180b5f462084c50ca7940e.zip | |
batman-adv: don't switch byte order too often if not needed
If possible, operations like ntohs/ntohl should not be
performed too often. Use a variable to locally store the
converted value and then use it.
Signed-off-by: Antonio Quartulli <antonio@open-mesh.com>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
Diffstat (limited to 'net/batman-adv/routing.c')
| -rw-r--r-- | net/batman-adv/routing.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/net/batman-adv/routing.c b/net/batman-adv/routing.c index 46278bfb8fdb..a89e812963e5 100644 --- a/net/batman-adv/routing.c +++ b/net/batman-adv/routing.c @@ -1135,6 +1135,7 @@ int batadv_recv_bcast_packet(struct sk_buff *skb, int hdr_size = sizeof(*bcast_packet); int ret = NET_RX_DROP; int32_t seq_diff; + uint32_t seqno; /* drop packet if it has not necessary minimum size */ if (unlikely(!pskb_may_pull(skb, hdr_size))) @@ -1170,12 +1171,13 @@ int batadv_recv_bcast_packet(struct sk_buff *skb, spin_lock_bh(&orig_node->bcast_seqno_lock); + seqno = ntohl(bcast_packet->seqno); /* check whether the packet is a duplicate */ if (batadv_test_bit(orig_node->bcast_bits, orig_node->last_bcast_seqno, - ntohl(bcast_packet->seqno))) + seqno)) goto spin_unlock; - seq_diff = ntohl(bcast_packet->seqno) - orig_node->last_bcast_seqno; + seq_diff = seqno - orig_node->last_bcast_seqno; /* check whether the packet is old and the host just restarted. */ if (batadv_window_protected(bat_priv, seq_diff, @@ -1186,7 +1188,7 @@ int batadv_recv_bcast_packet(struct sk_buff *skb, * if required. */ if (batadv_bit_get_packet(bat_priv, orig_node->bcast_bits, seq_diff, 1)) - orig_node->last_bcast_seqno = ntohl(bcast_packet->seqno); + orig_node->last_bcast_seqno = seqno; spin_unlock_bh(&orig_node->bcast_seqno_lock); |