Open coded calculation can be avoided and replaced by the
equivalent csum_replace4() in nft_csum_replace().
Signed-off-by: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
---
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
