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net: move zerocopy_sg_from_iovec() to net/core/datagram.c

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To let it be reused and reduce code duplication. Also document this function.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jason Wang 2013-08-06 17:45:04 +08:00 • committed by David S. Miller
commit c3bdeb5c7c
4 changed files with 97 additions and 160 deletions
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4
include/linux/skbuff.h
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@ -2359,6 +2359,10 @@ extern int skb_copy_datagram_from_iovec(struct sk_buff *skb,
const struct iovec *from,
int from_offset,
int len);
extern int zerocopy_sg_from_iovec(struct sk_buff *skb,
const struct iovec *frm,
int offset,
size_t count);
extern int skb_copy_datagram_const_iovec(const struct sk_buff *from,
int offset,
const struct iovec *to,