[PATCH net-next] tcp: use page_ref_inc() in tcp_sendmsg()

[Eric Dumazet]

From: Eric Dumazet <eduma...@google.com>

sk_page_frag_refill() allocates either a compound page or an order-0
page. We can use page_ref_inc() which is slightly faster than get_page()

Signed-off-by: Eric Dumazet <eduma...@google.com>
---
 net/ipv4/tcp.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 
d44a6989e76d69aa44e2a26d37b4204376c94966..da385ae997a3d61f0217a2e585088a82e6d50cd3
 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -1288,7 +1288,7 @@ int tcp_sendmsg(struct sock *sk, struct msghdr *msg, 
size_t size)
                        } else {
                                skb_fill_page_desc(skb, i, pfrag->page,
                                                   pfrag->offset, copy);
-                               get_page(pfrag->page);
+                               page_ref_inc(pfrag->page);
                        }
                        pfrag->offset += copy;
                }