diff options
| -rw-r--r-- | net/core/skbuff.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/net/core/skbuff.c b/net/core/skbuff.c index f2367818c130..1c2b9ae7bce6 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -723,7 +723,14 @@ fallback: fclones = container_of(skb, struct sk_buff_fclones, skb1); - skb->fclone = SKB_FCLONE_ORIG; + /* skb->fclone is a 2bits field. + * Replace expensive RMW (skb->fclone = SKB_FCLONE_ORIG) + * with a single OR. + */ + BUILD_BUG_ON(SKB_FCLONE_UNAVAILABLE != 0); + DEBUG_NET_WARN_ON_ONCE(skb->fclone != SKB_FCLONE_UNAVAILABLE); + skb->fclone |= SKB_FCLONE_ORIG; + refcount_set(&fclones->fclone_ref, 1); } |