netdev - [PATCH 1/2] net: declare new net_device priv_flag IFF_NO

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Message-Id: <1439485268-20953-2-git-send-email-phil@nwl.cc>
Date:	Thu, 13 Aug 2015 19:01:06 +0200
From:	Phil Sutter <phil@....cc>
To:	netdev@...r.kernel.org
Cc:	brouer@...hat.com, alexei.starovoitov@...il.com,
	davem@...emloft.net, fw@...len.de, cwang@...pensource.com,
	eric.dumazet@...il.com
Subject: [PATCH 1/2] net: declare new net_device priv_flag IFF_NO_QUEUE

This private net_device flag can be set by drivers to inform that a
device runs fine without a qdisc attached. This was formerly done by
setting tx_queue_len to zero.

Signed-off-by: Phil Sutter <phil@....cc>
---
 include/linux/netdevice.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 607b5f4..7ed6fb0 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1262,6 +1262,7 @@ struct net_device_ops {
  * @IFF_LIVE_ADDR_CHANGE: device supports hardware address
  *	change when it's running
  * @IFF_MACVLAN: Macvlan device
+ * @IFF_NO_QUEUE: device can run without qdisc attached
  */
 enum netdev_priv_flags {
 	IFF_802_1Q_VLAN			= 1<<0,
@@ -1289,6 +1290,7 @@ enum netdev_priv_flags {
 	IFF_XMIT_DST_RELEASE_PERM	= 1<<22,
 	IFF_IPVLAN_MASTER		= 1<<23,
 	IFF_IPVLAN_SLAVE		= 1<<24,
+	IFF_NO_QUEUE			= 1<<25,
 };
 
 #define IFF_802_1Q_VLAN			IFF_802_1Q_VLAN
@@ -1316,6 +1318,7 @@ enum netdev_priv_flags {
 #define IFF_XMIT_DST_RELEASE_PERM	IFF_XMIT_DST_RELEASE_PERM
 #define IFF_IPVLAN_MASTER		IFF_IPVLAN_MASTER
 #define IFF_IPVLAN_SLAVE		IFF_IPVLAN_SLAVE
+#define IFF_NO_QUEUE			IFF_NO_QUEUE
 
 /**
  *	struct net_device - The DEVICE structure.
-- 
2.1.2

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