net: explain __skb_checksum_complete() with comments

Cc: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 0 deletions

diff --git a/net/core/dev.c b/net/core/dev.c
index f69b2fcdee40..abe50c424b29 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -5791,6 +5791,7 @@ __sum16 __skb_gro_checksum_complete(struct sk_buff *skb)
 
         /* NAPI_GRO_CB(skb)->csum holds pseudo checksum */
         sum = csum_fold(csum_add(NAPI_GRO_CB(skb)->csum, wsum));
+        /* See comments in __skb_checksum_complete(). */
         if (likely(!sum)) {
                 if (unlikely(skb->ip_summed == CHECKSUM_COMPLETE) &&
                     !skb->csum_complete_sw)