skb: Add skb_postpush_rcsum()

This is based on commit f8ffad69c9 upstream,
"bpf: add skb_postpush_rcsum and fix dev_forward_skb occasions".  We don't
need the bpf fixes here, just the new function.

Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
This commit is contained in:
Ben Hutchings 2018-06-05 03:24:01 +01:00
commit c0809b34e3