netlink: Export genl_lock() API for use by modules
This lets kernel modules which use genl netlink APIs serialize netlink
processing.
Signed-off-by: James Chapman <jchapman@katalix.com>
Reviewed-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/genetlink.h b/include/linux/genetlink.h
index b834ef6..61549b2 100644
--- a/include/linux/genetlink.h
+++ b/include/linux/genetlink.h
@@ -80,4 +80,12 @@
#define CTRL_ATTR_MCAST_GRP_MAX (__CTRL_ATTR_MCAST_GRP_MAX - 1)
+#ifdef __KERNEL__
+
+/* All generic netlink requests are serialized by a global lock. */
+extern void genl_lock(void);
+extern void genl_unlock(void);
+
+#endif /* __KERNEL__ */
+
#endif /* __LINUX_GENERIC_NETLINK_H */