From: Paulius Zaleckas on
From: None <None>

When compiling userspace application which includes
if_tunnel.h and uses GRE_* defines you will get undefined
reference to __cpu_to_be16.

Fix this by adding missing #include <asm/byteorder.h>

Cc: stable(a)kernel.org
Signed-off-by: Paulius Zaleckas <paulius.zaleckas(a)gmail.com>
---

include/linux/if_tunnel.h | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/include/linux/if_tunnel.h b/include/linux/if_tunnel.h
index 1822d63..16b92d0 100644
--- a/include/linux/if_tunnel.h
+++ b/include/linux/if_tunnel.h
@@ -2,6 +2,7 @@
#define _IF_TUNNEL_H_

#include <linux/types.h>
+#include <asm/byteorder.h>

#ifdef __KERNEL__
#include <linux/ip.h>

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