X-Git-Url: http://git.cascardo.info/?a=blobdiff_plain;f=net%2Fcore%2Fdev.c;h=ea6312057a7136806fc0c17d018c8909d4d130ba;hb=110a9e42b68719f584879c5c5c727bbae90d15f9;hp=dd6ce598de897363bbb7eea252a22cbc2e846dc4;hpb=6296c41259af263780a976d9e2db6bb581709d45;p=cascardo%2Flinux.git

diff --git a/net/core/dev.c b/net/core/dev.c
index dd6ce598de89..ea6312057a71 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -3974,6 +3974,22 @@ sch_handle_ingress(struct sk_buff *skb, struct packet_type **pt_prev, int *ret,
 	return skb;
 }
 
+/**
+ *	netdev_is_rx_handler_busy - check if receive handler is registered
+ *	@dev: device to check
+ *
+ *	Check if a receive handler is already registered for a given device.
+ *	Return true if there one.
+ *
+ *	The caller must hold the rtnl_mutex.
+ */
+bool netdev_is_rx_handler_busy(struct net_device *dev)
+{
+	ASSERT_RTNL();
+	return dev && rtnl_dereference(dev->rx_handler);
+}
+EXPORT_SYMBOL_GPL(netdev_is_rx_handler_busy);
+
 /**
  *	netdev_rx_handler_register - register receive handler
  *	@dev: device to register a handler for