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net: Add and use skb_mark_not_on_list().

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An SKB is not on a list if skb->next is NULL.

Codify this convention into a helper function and use it
where we are dequeueing an SKB and need to mark it as such.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
2018-07-29 20:42:53 -07:00
parent 776f07ee30
commit a8305bff68
22 changed files with 33 additions and 28 deletions
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8
net/core/dev.c
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@@ -3231,7 +3231,7 @@ struct sk_buff *dev_hard_start_xmit(struct sk_buff *first, struct net_device *de
while (skb) {
struct sk_buff *next = skb->next;
skb->next = NULL;
skb_mark_not_on_list(skb);
rc = xmit_one(skb, dev, txq, next != NULL);
if (unlikely(!dev_xmit_complete(rc))) {
skb->next = next;
@@ -3331,7 +3331,7 @@ struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *d
for (; skb != NULL; skb = next) {
next = skb->next;
skb->next = NULL;
skb_mark_not_on_list(skb);
/* in case skb wont be segmented, point to itself */
skb->prev = skb;
@@ -5296,7 +5296,7 @@ static void __napi_gro_flush_chain(struct napi_struct *napi, u32 index,
if (flush_old && NAPI_GRO_CB(skb)->age == jiffies)
return;
list_del(&skb->list);
skb->next = NULL;
skb_mark_not_on_list(skb);
napi_gro_complete(skb);
napi->gro_hash[index].count--;
}
@@ -5482,7 +5482,7 @@ static enum gro_result dev_gro_receive(struct napi_struct *napi, struct sk_buff
if (pp) {
list_del(&pp->list);
pp->next = NULL;
skb_mark_not_on_list(pp);
napi_gro_complete(pp);
napi->gro_hash[hash].count--;
}