leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

net: Drop NETDEV_UNREGISTER_FINAL

Browse Source 
Last user is gone after bdf5bd7f21 "rds: tcp: remove
register_netdevice_notifier infrastructure.", so we can
remove this netdevice command. This allows to delete
rtnl_lock() in netdev_run_todo(), which is hot path for
net namespace unregistration.

dev_change_net_namespace() and netdev_wait_allrefs()
have rcu_barrier() before NETDEV_UNREGISTER_FINAL call,
and the source commits say they were introduced to
delemit the call with NETDEV_UNREGISTER, but this patch
leaves them on the places, since they require additional
analysis, whether we need in them for something else.

Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Kirill Tkhai
2018-03-23 19:47:39 +03:00
committed by David S. Miller
parent 3e0c2dbfea
commit 070f2d7e26
4 changed files with 4 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
include/rdma/ib_verbs.h
View File

@@ -2122,8 +2122,8 @@ struct ib_device {
* net device of device @device at port @port_num or NULL if such
* a net device doesn't exist. The vendor driver should call dev_hold
* on this net device. The HW vendor's device driver must guarantee
* that this function returns NULL before the net device reaches
* NETDEV_UNREGISTER_FINAL state.
* that this function returns NULL before the net device has finished
* NETDEV_UNREGISTER state.
*/
struct net_device *(*get_netdev)(struct ib_device *device,
u8 port_num);