compat: backport device_{lock,trylock,unlock}

This fixes build of ar9170.

CC: Gus Wirth <gwirth79@gmail.com>
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

diff --git a/include/linux/compat-2.6.34.h b/include/linux/compat-2.6.34.h
index b5d190398c95227df82ab34eb7fa42c86242e7dd..d189bee7d0c5838b184b894b46f078d2569099da 100644 (file)
--- a/include/linux/compat-2.6.34.h
+++ b/include/linux/compat-2.6.34.h
@@ -139,6 +139,22 @@ do {                                                               \
 #endif
 /* source: include/linux/netdevice.h */
 
+
+static inline void device_lock(struct device *dev)
+{
+       down(&dev->sem);
+}
+
+static inline int device_trylock(struct device *dev)
+{
+       return down_trylock(&dev->sem);
+}
+
+static inline void device_unlock(struct device *dev)
+{
+       up(&dev->sem);
+}
+
 #endif /* (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,34)) */
 
 #endif /* LINUX_26_34_COMPAT_H */