From 7608894e43d071ef2322a01c79522954c070ac6c Mon Sep 17 00:00:00 2001 From: Paolo Abeni Date: Wed, 14 Jun 2017 11:48:48 +0200 Subject: [PATCH] net: use skb_unref() in napi_consume_skb() The commit 83ada39bb79d ("net: factor out a helper to decrement the skb refcount") provided and used a helper for decrementing skb usage, but I missed at least a spot for it. This change remove some more duplicated code reusing skb_unref() in napi_consume_skb(), too. The helper uses an additional, unneeded unlikely(!skb) test - napi_consume_skb() already check it a few lines above - but the compiler is smart enough to optimize the duplicated test out. Signed-off-by: Paolo Abeni Signed-off-by: David S. Miller --- net/core/skbuff.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/net/core/skbuff.c b/net/core/skbuff.c index 3046027..c4d2c1f 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -817,10 +817,9 @@ void napi_consume_skb(struct sk_buff *skb, int budget) return; } - if (likely(atomic_read(&skb->users) == 1)) - smp_rmb(); - else if (likely(!atomic_dec_and_test(&skb->users))) + if (!skb_unref(skb)) return; + /* if reaching here SKB is ready to free */ trace_consume_skb(skb); -- 2.7.4