From 0433547aa7443cefc89d9b533169bdc50f1206b8 Mon Sep 17 00:00:00 2001
From: Jason Wang <jasowang@redhat.com>
Date: Tue, 6 Aug 2013 17:45:07 +0800
Subject: [PATCH] net: use release_pages() in zerocopy_sg_from_iovec()

To reduce the duplicated codes.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/core/datagram.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/net/core/datagram.c b/net/core/datagram.c
index a8a795cfeff5..badcd93e5dd8 100644
--- a/net/core/datagram.c
+++ b/net/core/datagram.c
@@ -48,6 +48,7 @@
 #include <linux/highmem.h>
 #include <linux/spinlock.h>
 #include <linux/slab.h>
+#include <linux/pagemap.h>
 
 #include <net/protocol.h>
 #include <linux/skbuff.h>
@@ -638,10 +639,7 @@ int zerocopy_sg_from_iovec(struct sk_buff *skb, const struct iovec *from,
 			return -EMSGSIZE;
 		num_pages = get_user_pages_fast(base, size, 0, &page[i]);
 		if (num_pages != size) {
-			int j;
-
-			for (j = 0; j < num_pages; j++)
-				put_page(page[i + j]);
+			release_pages(&page[i], num_pages, 0);
 			return -EFAULT;
 		}
 		truesize = size * PAGE_SIZE;
-- 
2.20.1