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samples/bpf: xdpsock: Remove forward declaration of ip_fast_csum()

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There is a forward declaration of ip_fast_csum() just before its
implementation, remove the unneeded forward declaration.

While at it mark the implementation as static inline.

Signed-off-by: Niklas Söderlund <niklas.soderlund@corigine.com>
Signed-off-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Reviewed-by: Louis Peens <louis.peens@corigine.com>
Link: https://lore.kernel.org/bpf/20210806122855.26115-3-simon.horman@corigine.com
This commit is contained in:
Niklas Söderlund 2021-08-06 14:28:55 +02:00 committed by Andrii Nakryiko
parent 29f24c43cb
commit f4700a62c2
1 changed files with 1 additions and 3 deletions
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4
samples/bpf/xdpsock_user.c
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@ -651,15 +651,13 @@ static unsigned int do_csum(const unsigned char *buff, int len)
return result;
}
__sum16 ip_fast_csum(const void *iph, unsigned int ihl);
/*
* This is a version of ip_compute_csum() optimized for IP headers,
* which always checksum on 4 octet boundaries.
* This function code has been taken from
* Linux kernel lib/checksum.c
*/
__sum16 ip_fast_csum(const void *iph, unsigned int ihl)
static inline __sum16 ip_fast_csum(const void *iph, unsigned int ihl)
{
return (__sum16)~do_csum(iph, ihl * 4);
}