From: Eric Dumazet <edumazet@google.com>
Date: Fri, 17 Feb 2017 17:11:42 +0000 (-0800)
Subject: tcp: use page_ref_inc() in tcp_sendmsg()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=4e33e34625103593a71d2bae471ce49cef62ef06;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

tcp: use page_ref_inc() in tcp_sendmsg()

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 <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index d44a6989e76d..da385ae997a3 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -1288,7 +1288,7 @@ new_segment:
 			} else {
 				skb_fill_page_desc(skb, i, pfrag->page,
 						   pfrag->offset, copy);
-				get_page(pfrag->page);
+				page_ref_inc(pfrag->page);
 			}
 			pfrag->offset += copy;
 		}