[PATCH] net: add missing prefetch.h include

[Heiko Carstens]

From: Heiko Carstens <heiko.carstens@xxxxxxxxxx>

Fixes build errors on s390 and probably other archs as well:

In file included from net/ipv4/ip_forward.c:32:0:
include/net/udp.h: In function 'udp_csum_outgoing':
include/net/udp.h:141:2: error: implicit declaration of function 'prefetch'

Signed-off-by: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
---

 include/linux/skbuff.h |    1 +
 1 file changed, 1 insertion(+)

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 79aafbb..8276815 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -28,6 +28,7 @@
 #include <net/checksum.h>
 #include <linux/rcupdate.h>
 #include <linux/dmaengine.h>
+#include <linux/prefetch.h>
 #include <linux/hrtimer.h>
 
 /* Don't change this without changing skb_csum_unnecessary! */
--
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