Open coded calculation can be avoided and replaced by the equivalent csum_replace4() in nft_csum_replace(). Signed-off-by: Christophe Leroy --- v2: Add cast to __be32 to match csum_replace4() expected param types --- net/netfilter/nft_payload.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/netfilter/nft_payload.c b/net/netfilter/nft_payload.c index 7dfc5343dae4..059b28ffad0e 100644 --- a/net/netfilter/nft_payload.c +++ b/net/netfilter/nft_payload.c @@ -684,7 +684,7 @@ static const struct nft_expr_ops nft_payload_inner_ops = { static inline void nft_csum_replace(__sum16 *sum, __wsum fsum, __wsum tsum) { - *sum = csum_fold(csum_add(csum_sub(~csum_unfold(*sum), fsum), tsum)); + csum_replace4(sum, (__force __be32)fsum, (__force __be32)tsum); if (*sum == 0) *sum = CSUM_MANGLED_0; } -- 2.49.0