From: Vivien Didelot Date: Thu, 1 Jun 2017 20:07:11 +0000 (-0400) Subject: net: dsa: comment hot path requirements X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=73a7ece8f70c955464080e434b5324bcdfdcb1b1;p=openwrt%2Fstaging%2Fblogic.git net: dsa: comment hot path requirements The DSA layer uses inline helpers and copy of the tagging functions for faster access in hot path. Add comments to detail that. Reviewed-by: Florian Fainelli Signed-off-by: Vivien Didelot Signed-off-by: David S. Miller --- diff --git a/include/net/dsa.h b/include/net/dsa.h index 7de1234ba136..18ca0a935c96 100644 --- a/include/net/dsa.h +++ b/include/net/dsa.h @@ -127,6 +127,8 @@ struct dsa_switch_tree { * protocol to use. */ struct net_device *master_netdev; + + /* Copy of tag_ops->rcv for faster access in hot path */ struct sk_buff * (*rcv)(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, @@ -465,6 +467,7 @@ struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev); struct net_device *dsa_dev_to_net_device(struct device *dev); +/* Keep inline for faster access in hot path */ static inline bool dsa_uses_tagged_protocol(struct dsa_switch_tree *dst) { return dst->rcv != NULL; diff --git a/net/dsa/dsa_priv.h b/net/dsa/dsa_priv.h index 7459d5735d8b..db2a7b9edfb8 100644 --- a/net/dsa/dsa_priv.h +++ b/net/dsa/dsa_priv.h @@ -73,6 +73,7 @@ struct dsa_device_ops { }; struct dsa_slave_priv { + /* Copy of dp->ds->dst->tag_ops->xmit for faster access in hot path */ struct sk_buff * (*xmit)(struct sk_buff *skb, struct net_device *dev);