[PATCH net-next] bridge: remove extern from function prototypes

[Duan Jiong <duanj.fnst@cn.fujitsu.com>]

There are a mix of function prototypes with and without extern
in the kernel sources. Standardize on not using extern for
function prototypes.

Function prototypes don't need to be written with extern.
extern is assumed by the compiler. Its use is as unnecessary as
using auto to declare automatic/local variables in a block.

Signed-off-by: Duan Jiong <duanj.fnst@cn.fujitsu.com>
---
 net/bridge/br_private.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index 2e77d92..458889e 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -762,7 +762,7 @@ unsigned long br_timer_value(const struct timer_list *timer);
 
 /* br.c */
 #if IS_ENABLED(CONFIG_ATM_LANE)
-extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
+int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
 #endif
 
 /* br_netlink.c */
-- 
1.8.3.1