From: Antonio Quartulli Date: Sun, 19 May 2013 10:55:16 +0000 (+0200) Subject: batman-adv: use htons when possible X-Git-Tag: v3.13-rc1~105^2~191^2~6 X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=293e93385e024be71500c9480ef85d6199459d17;p=~emulex%2Finfiniband.git batman-adv: use htons when possible When comparing a network ordered value with a constant, it is better to convert the constant at compile time by means of htons() instead of converting the value at runtime using ntohs(). This refactoring may slightly improve the code performance. Moreover substitute __constant_htons() with htons() since the latter increase readability and it is smart enough to be as efficient as the former Signed-off-by: Antonio Quartulli Signed-off-by: Marek Lindner Acked-by: Simon Wunderlich --- diff --git a/net/batman-adv/bridge_loop_avoidance.c b/net/batman-adv/bridge_loop_avoidance.c index 70da18ab41c..5bb58d7bdd5 100644 --- a/net/batman-adv/bridge_loop_avoidance.c +++ b/net/batman-adv/bridge_loop_avoidance.c @@ -863,25 +863,25 @@ static int batadv_bla_process_claim(struct batadv_priv *bat_priv, struct arphdr *arphdr; uint8_t *hw_src, *hw_dst; struct batadv_bla_claim_dst *bla_dst; - uint16_t proto; + __be16 proto; int headlen; unsigned short vid = BATADV_NO_FLAGS; int ret; ethhdr = eth_hdr(skb); - if (ntohs(ethhdr->h_proto) == ETH_P_8021Q) { + if (ethhdr->h_proto == htons(ETH_P_8021Q)) { vhdr = (struct vlan_ethhdr *)ethhdr; vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK; vid |= BATADV_VLAN_HAS_TAG; - proto = ntohs(vhdr->h_vlan_encapsulated_proto); + proto = vhdr->h_vlan_encapsulated_proto; headlen = sizeof(*vhdr); } else { - proto = ntohs(ethhdr->h_proto); + proto = ethhdr->h_proto; headlen = ETH_HLEN; } - if (proto != ETH_P_ARP) + if (proto != htons(ETH_P_ARP)) return 0; /* not a claim frame */ /* this must be a ARP frame. check if it is a claim. */ @@ -1379,7 +1379,7 @@ int batadv_bla_is_backbone_gw(struct sk_buff *skb, ethhdr = (struct ethhdr *)(((uint8_t *)skb->data) + hdr_size); - if (ntohs(ethhdr->h_proto) == ETH_P_8021Q) { + if (ethhdr->h_proto == htons(ETH_P_8021Q)) { if (!pskb_may_pull(skb, hdr_size + VLAN_ETH_HLEN)) return 0; diff --git a/net/batman-adv/gateway_client.c b/net/batman-adv/gateway_client.c index ac97ca7f4ad..053bb318c7a 100644 --- a/net/batman-adv/gateway_client.c +++ b/net/batman-adv/gateway_client.c @@ -716,11 +716,11 @@ bool batadv_gw_is_dhcp_target(struct sk_buff *skb, unsigned int *header_len) /* check for bootp port */ if ((proto == htons(ETH_P_IP)) && - (ntohs(udphdr->dest) != 67)) + (udphdr->dest != htons(67))) return false; if ((proto == htons(ETH_P_IPV6)) && - (ntohs(udphdr->dest) != 547)) + (udphdr->dest != htons(547))) return false; return true; diff --git a/net/batman-adv/hard-interface.c b/net/batman-adv/hard-interface.c index 0c8602e5a5c..004017c523f 100644 --- a/net/batman-adv/hard-interface.c +++ b/net/batman-adv/hard-interface.c @@ -379,7 +379,7 @@ int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface, { struct batadv_priv *bat_priv; struct net_device *soft_iface, *master; - __be16 ethertype = __constant_htons(ETH_P_BATMAN); + __be16 ethertype = htons(ETH_P_BATMAN); int ret; if (hard_iface->if_status != BATADV_IF_NOT_IN_USE) diff --git a/net/batman-adv/send.c b/net/batman-adv/send.c index 1a1aa59d78e..4bbcf51db6a 100644 --- a/net/batman-adv/send.c +++ b/net/batman-adv/send.c @@ -63,10 +63,10 @@ int batadv_send_skb_packet(struct sk_buff *skb, ethhdr = eth_hdr(skb); memcpy(ethhdr->h_source, hard_iface->net_dev->dev_addr, ETH_ALEN); memcpy(ethhdr->h_dest, dst_addr, ETH_ALEN); - ethhdr->h_proto = __constant_htons(ETH_P_BATMAN); + ethhdr->h_proto = htons(ETH_P_BATMAN); skb_set_network_header(skb, ETH_HLEN); - skb->protocol = __constant_htons(ETH_P_BATMAN); + skb->protocol = htons(ETH_P_BATMAN); skb->dev = hard_iface->net_dev; diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c index 18b1fd915d1..87e7e4ed216 100644 --- a/net/batman-adv/soft-interface.c +++ b/net/batman-adv/soft-interface.c @@ -145,7 +145,7 @@ static int batadv_interface_tx(struct sk_buff *skb, struct batadv_hard_iface *primary_if = NULL; struct batadv_bcast_packet *bcast_packet; struct vlan_ethhdr *vhdr; - __be16 ethertype = __constant_htons(ETH_P_BATMAN); + __be16 ethertype = htons(ETH_P_BATMAN); static const uint8_t stp_addr[ETH_ALEN] = {0x01, 0x80, 0xC2, 0x00, 0x00, 0x00}; static const uint8_t ectp_addr[ETH_ALEN] = {0xCF, 0x00, 0x00, 0x00, @@ -312,7 +312,7 @@ void batadv_interface_rx(struct net_device *soft_iface, struct vlan_ethhdr *vhdr; struct batadv_header *batadv_header = (struct batadv_header *)skb->data; unsigned short vid __maybe_unused = BATADV_NO_FLAGS; - __be16 ethertype = __constant_htons(ETH_P_BATMAN); + __be16 ethertype = htons(ETH_P_BATMAN); bool is_bcast; is_bcast = (batadv_header->packet_type == BATADV_BCAST);