batman-adv: upgrade package to latest release 2018.0

* support latest kernels (3.2 - 4.16)
* coding style cleanups and refactoring
* mark licenses clearer, change UAPI header from ISC to MIT
* bugs squashed:

  - fix packet checksum handling in receive path
  - fix handling of large number of interfaces
  - fix netlink dumping of gateways and BLA claims+backbones

Signed-off-by: Sven Eckelmann <sven@narfation.org>

batman-adv/Makefile

@@ -9,10 +9,10 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=batman-adv
 
-PKG_VERSION:=2017.4
+PKG_VERSION:=2018.0
 PKG_RELEASE:=0
-PKG_MD5SUM:=5d5a845725ccc89255c9e8a714db4b75
+PKG_MD5SUM:=c39d67cdb5509bf638efc9083e0dd41e
-PKG_HASH:=8a50ffacd2bd5b65b2987eb2ae06fb9338c6af46935ec38ba869cca545719a4c
+PKG_HASH:=4826f838e8a2914a9470da25ea2f17f6325c464a130093b20dc7fb4e93f7576c
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://downloads.open-mesh.org/batman/releases/batman-adv-$(PKG_VERSION)

batman-adv/files/compat-hacks.h

@@ -333,6 +333,16 @@ static inline void timer_setup(struct timer_list *timer,
 	container_of(callback_timer, typeof(*var), timer_fieldname)
 
 #endif /* !from_timer */
+	
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 16, 0)
+
+#ifdef __CHECK_POLL
+typedef unsigned __bitwise __poll_t;
+#else
+typedef unsigned __poll_t;
+#endif
+
+#endif /* < KERNEL_VERSION(4, 16, 0) */
 
 /* <DECLARE_EWMA> */
 
@@ -392,7 +402,7 @@ static inline void timer_setup(struct timer_list *timer,
 	static inline void ewma_##name##_add(struct ewma_##name *e,	\
 					     unsigned long val)		\
 	{								\
-		unsigned long internal = ACCESS_ONCE(e->internal);	\
+		unsigned long internal = READ_ONCE(e->internal);	\
 		unsigned long weight_rcp = ilog2(_weight_rcp);		\
 		unsigned long precision = _precision;			\
 									\
@@ -401,10 +411,10 @@ static inline void timer_setup(struct timer_list *timer,
 		BUILD_BUG_ON((_precision) > 30);			\
 		BUILD_BUG_ON_NOT_POWER_OF_2(_weight_rcp);		\
 									\
-		ACCESS_ONCE(e->internal) = internal ?			\
+		WRITE_ONCE(e->internal, internal ?			\
 			(((internal << weight_rcp) - internal) +	\
 				(val << precision)) >> weight_rcp :	\
-			(val << precision);				\
+			(val << precision));				\
 	}
 
 /* </DECLARE_EWMA> */

batman-adv/patches/0001-compat-hacks.patch

@@ -0,0 +1,33 @@
+--- a/net/batman-adv/main.c
++++ b/net/batman-adv/main.c
+@@ -19,7 +19,7 @@
+ #include "main.h"
+ 
+ #include <linux/atomic.h>
+-#include <linux/build_bug.h>
++#include <linux/bug.h>
+ #include <linux/byteorder/generic.h>
+ #include <linux/crc32c.h>
+ #include <linux/errno.h>
+--- a/net/batman-adv/tp_meter.c
++++ b/net/batman-adv/tp_meter.c
+@@ -20,7 +20,7 @@
+ #include "main.h"
+ 
+ #include <linux/atomic.h>
+-#include <linux/build_bug.h>
++#include <linux/bug.h>
+ #include <linux/byteorder/generic.h>
+ #include <linux/cache.h>
+ #include <linux/compiler.h>
+--- a/net/batman-adv/translation-table.c
++++ b/net/batman-adv/translation-table.c
+@@ -21,7 +21,7 @@
+ 
+ #include <linux/atomic.h>
+ #include <linux/bitops.h>
+-#include <linux/build_bug.h>
++#include <linux/bug.h>
+ #include <linux/byteorder/generic.h>
+ #include <linux/cache.h>
+ #include <linux/compiler.h>