net: Do not return value from init_dummy_netdev()

JIRA: https://issues.redhat.com/browse/RHEL-59092

commit d160c66
Author: Amit Cohen <amcohen@nvidia.com>
Date:   Mon Feb 5 12:30:22 2024 +0200

    net: Do not return value from init_dummy_netdev()

    init_dummy_netdev() always returns zero and all the callers do not check
    the returned value. Set the function to not return value, as it is not
    really used today.

    Signed-off-by: Amit Cohen <amcohen@nvidia.com>
    Reviewed-by: Ido Schimmel <idosch@nvidia.com>
    Reviewed-by: Jiri Pirko <jiri@nvidia.com>
    Reviewed-by: Simon Horman <horms@kernel.org>
    Link: https://lore.kernel.org/r/20240205103022.440946-1-amcohen@nvidia.com
    Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Signed-off-by: Izabela Bakollari <ibakolla@redhat.com>

Author: Izabela Bakollari

include/linux/netdevice.h

@@ -3177,7 +3177,7 @@ static inline void unregister_netdevice(struct net_device *dev)
 int netdev_refcnt_read(const struct net_device *dev);
 void free_netdev(struct net_device *dev);
 void netdev_freemem(struct net_device *dev);
-int init_dummy_netdev(struct net_device *dev);
+void init_dummy_netdev(struct net_device *dev);
 
 struct net_device *netdev_get_xmit_slave(struct net_device *dev,
 					 struct sk_buff *skb,

net/core/dev.c

@@ -10159,7 +10159,7 @@ EXPORT_SYMBOL(register_netdevice);
  *	that need to tie several hardware interfaces to a single NAPI
  *	poll scheduler due to HW limitations.
  */
-int init_dummy_netdev(struct net_device *dev)
+void init_dummy_netdev(struct net_device *dev)
 {
 	/* Clear everything. Note we don't initialize spinlocks
 	 * are they aren't supposed to be taken by any of the
@@ -10187,8 +10187,6 @@ int init_dummy_netdev(struct net_device *dev)
 	 * because users of this 'device' dont need to change
 	 * its refcount.
 	 */
-
-	return 0;
 }
 EXPORT_SYMBOL_GPL(init_dummy_netdev);