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Commit d27f9b35 authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller
Browse files

ip_frag: Remove some atomic ops 



Instead of doing one atomic operation per frag, we can factorize them.

Signed-off-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 2bbdf389

net/ipv4/ip_fragment.c

+1 −2
Original line number Diff line number Diff line
@@ -556,7 +556,6 @@ static int ip_frag_reasm(struct ipq *qp, struct sk_buff *prev, 


	skb_shinfo(head)->frag_list = head->next;

	skb_push(head, head->data - skb_network_header(head));

	atomic_sub(head->truesize, &qp->q.net->mem);



	for (fp=head->next; fp; fp = fp->next) {

		head->data_len += fp->len;
@@ -566,8 +565,8 @@ static int ip_frag_reasm(struct ipq *qp, struct sk_buff *prev, 
		else if (head->ip_summed == CHECKSUM_COMPLETE)

			head->csum = csum_add(head->csum, fp->csum);

		head->truesize += fp->truesize;

		atomic_sub(fp->truesize, &qp->q.net->mem);

	}

	atomic_sub(head->truesize, &qp->q.net->mem);



	head->next = NULL;

	head->dev = dev;

net/ipv6/reassembly.c

+1 −2
Original line number Diff line number Diff line
@@ -524,7 +524,6 @@ static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff *prev, 
	skb_shinfo(head)->frag_list = head->next;

	skb_reset_transport_header(head);

	skb_push(head, head->data - skb_network_header(head));

	atomic_sub(head->truesize, &fq->q.net->mem);



	for (fp=head->next; fp; fp = fp->next) {

		head->data_len += fp->len;
@@ -534,8 +533,8 @@ static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff *prev, 
		else if (head->ip_summed == CHECKSUM_COMPLETE)

			head->csum = csum_add(head->csum, fp->csum);

		head->truesize += fp->truesize;

		atomic_sub(fp->truesize, &fq->q.net->mem);

	}

	atomic_sub(head->truesize, &fq->q.net->mem);



	head->next = NULL;

	head->dev = dev;