From: Eric Dumazet Date: Mon, 10 Dec 2012 13:28:16 +0000 (+0000) Subject: net: gro: dev_gro_receive() cleanup X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=89c5fa3369a47db0df904c45c1c26e64c0404430;p=openwrt%2Fstaging%2Fblogic.git net: gro: dev_gro_receive() cleanup __napi_gro_receive() is inlined from two call sites for no good reason. Lets move the prep stuff in a function of its own, called only if/when needed. This saves 300 bytes on x86 : # size net/core/dev.o.after net/core/dev.o.before text data bss dec hex filename 51968 1238 1040 54246 d3e6 net/core/dev.o.before 51664 1238 1040 53942 d2b6 net/core/dev.o.after Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller --- diff --git a/net/core/dev.c b/net/core/dev.c index a4c4a1bf07d5..47838509f5fd 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -3603,6 +3603,28 @@ void napi_gro_flush(struct napi_struct *napi, bool flush_old) } EXPORT_SYMBOL(napi_gro_flush); +static void gro_list_prepare(struct napi_struct *napi, struct sk_buff *skb) +{ + struct sk_buff *p; + unsigned int maclen = skb->dev->hard_header_len; + + for (p = napi->gro_list; p; p = p->next) { + unsigned long diffs; + + diffs = (unsigned long)p->dev ^ (unsigned long)skb->dev; + diffs |= p->vlan_tci ^ skb->vlan_tci; + if (maclen == ETH_HLEN) + diffs |= compare_ether_header(skb_mac_header(p), + skb_gro_mac_header(skb)); + else if (!diffs) + diffs = memcmp(skb_mac_header(p), + skb_gro_mac_header(skb), + maclen); + NAPI_GRO_CB(p)->same_flow = !diffs; + NAPI_GRO_CB(p)->flush = 0; + } +} + static enum gro_result dev_gro_receive(struct napi_struct *napi, struct sk_buff *skb) { struct sk_buff **pp = NULL; @@ -3619,6 +3641,8 @@ static enum gro_result dev_gro_receive(struct napi_struct *napi, struct sk_buff if (skb_is_gso(skb) || skb_has_frag_list(skb)) goto normal; + gro_list_prepare(napi, skb); + rcu_read_lock(); list_for_each_entry_rcu(ptype, head, list) { if (ptype->type != type || !ptype->callbacks.gro_receive) @@ -3695,30 +3719,6 @@ normal: goto pull; } -static inline gro_result_t -__napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb) -{ - struct sk_buff *p; - unsigned int maclen = skb->dev->hard_header_len; - - for (p = napi->gro_list; p; p = p->next) { - unsigned long diffs; - - diffs = (unsigned long)p->dev ^ (unsigned long)skb->dev; - diffs |= p->vlan_tci ^ skb->vlan_tci; - if (maclen == ETH_HLEN) - diffs |= compare_ether_header(skb_mac_header(p), - skb_gro_mac_header(skb)); - else if (!diffs) - diffs = memcmp(skb_mac_header(p), - skb_gro_mac_header(skb), - maclen); - NAPI_GRO_CB(p)->same_flow = !diffs; - NAPI_GRO_CB(p)->flush = 0; - } - - return dev_gro_receive(napi, skb); -} static gro_result_t napi_skb_finish(gro_result_t ret, struct sk_buff *skb) { @@ -3768,7 +3768,7 @@ gro_result_t napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb) { skb_gro_reset_offset(skb); - return napi_skb_finish(__napi_gro_receive(napi, skb), skb); + return napi_skb_finish(dev_gro_receive(napi, skb), skb); } EXPORT_SYMBOL(napi_gro_receive); @@ -3866,7 +3866,7 @@ gro_result_t napi_gro_frags(struct napi_struct *napi) if (!skb) return GRO_DROP; - return napi_frags_finish(napi, skb, __napi_gro_receive(napi, skb)); + return napi_frags_finish(napi, skb, dev_gro_receive(napi, skb)); } EXPORT_SYMBOL(napi_gro_frags);