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net: Fix page seeking for skb_splice_bits().

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struct page walking should be done with proper accessor functions, not
directly.

With doubts from David S. Miller and Herbert Xu.

Signed-off-by: Jarek Poplawski <jarkao2@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jarek Poplawski
2009-02-12 16:51:43 -08:00
committed by David S. Miller
parent 51621fbdb1
commit ce3dd39595
1 changed files with 6 additions and 1 deletions
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7
net/core/skbuff.c
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@@ -1412,8 +1412,13 @@ static inline int spd_fill_page(struct splice_pipe_desc *spd, struct page *page,
static inline void __segment_seek(struct page **page, unsigned int *poff, static inline void __segment_seek(struct page **page, unsigned int *poff,
unsigned int *plen, unsigned int off) unsigned int *plen, unsigned int off)
{ {
unsigned long n;
*poff += off; *poff += off;
*page += *poff / PAGE_SIZE; n = *poff / PAGE_SIZE;
if (n)
*page = nth_page(*page, n);
*poff = *poff % PAGE_SIZE; *poff = *poff % PAGE_SIZE;
*plen -= off; *plen -= off;
} }