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ipv6: Pass proto to csum_ipv6_magic as __u8 instead of unsigned short

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This patch updates csum_ipv6_magic so that it correctly recognizes that
protocol is a unsigned 8 bit value.

This will allow us to better understand what limitations may or may not be
present in how we handle the data.  For example there are a number of
places that call htonl on the protocol value.  This is likely not necessary
and can be replaced with a multiplication by ntohl(1) which will be
converted to a shift by the compiler.

Signed-off-by: Alexander Duyck <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Alexander Duyck 2016-03-11 14:05:41 -08:00 • committed by David S. Miller
commit 1e94082963
18 changed files with 21 additions and 29 deletions
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3
include/net/ip6_checksum.h
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@ -37,8 +37,7 @@
#ifndef _HAVE_ARCH_IPV6_CSUM
__sum16 csum_ipv6_magic(const struct in6_addr *saddr,
const struct in6_addr *daddr,
__u32 len, unsigned short proto,
__wsum csum);
__u32 len, __u8 proto, __wsum csum);
#endif
static inline __wsum ip6_compute_pseudo(struct sk_buff *skb, int proto)