centos man page for netdev_has_any_upper_dev

NETDEV_HAS_ANY_UPPER(9) 				      Network device support					   NETDEV_HAS_ANY_UPPER(9)

NAME
       netdev_has_any_upper_dev - Check if device is linked to some device

SYNOPSIS
       bool netdev_has_any_upper_dev(struct net_device * dev);

ARGUMENTS
       dev
	   device

DESCRIPTION
       Find out if a device is linked to an upper device and return true in case it is. The caller must hold the RTNL lock.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						   NETDEV_HAS_ANY_UPPER(9)