net: optimize skb_postpull_rcsum()
Remove one pair of add/adc instructions and their dependency against carry flag. We can leverage third argument to csum_partial(): X = csum_block_sub(X, csum_partial(start, len, 0), 0); --> X = csum_block_add(X, ~csum_partial(start, len, 0), 0); --> X = ~csum_partial(start, len, ~X); Signed-off-by:Eric Dumazet <edumazet@google.com> Signed-off-by:
Jakub Kicinski <kuba@kernel.org>
parent
0bd28476
Please register or sign in to comment