| commit | fc1dd36992bb041b4470120aecf8986910c56088 | |
| author | Kirill Tkhai <ktkhai@virtuozzo.com> | |
| Fri, 30 Mar 2018 16:38:27 +0000 (30 19:38 +0300) | ||
| committer | David S. Miller <davem@davemloft.net> | |
| Sun, 1 Apr 2018 02:24:58 +0000 (31 22:24 -0400) | ||
| tree | 7fbea89ad406d55660f89abf4f380b7e010b565d | treesnapshot (tar.gz zip) |
| parent | c679f6a26dc3d450b76e94717850a14ff706cc58 | commitdiff |
net: Remove net_rwsem from {, un}register_netdevice_notifier()
These functions take net_rwsem, while wireless_nlevent_flush()
also takes it. But down_read() can't be taken recursive,
because of rw_semaphore design, which prevents it to be occupied
by only readers forever.
Since we take pernet_ops_rwsem in {,un}register_netdevice_notifier(),
net list can't change, so these down_read()/up_read() can be removed.
Fixes: f0b07bb151b0 "net: Introduce net_rwsem to protect net_namespace_list"
Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
These functions take net_rwsem, while wireless_nlevent_flush()
also takes it. But down_read() can't be taken recursive,
because of rw_semaphore design, which prevents it to be occupied
by only readers forever.
Since we take pernet_ops_rwsem in {,un}register_netdevice_notifier(),
net list can't change, so these down_read()/up_read() can be removed.
Fixes: f0b07bb151b0 "net: Introduce net_rwsem to protect net_namespace_list"
Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| net/core/dev.c | diffblobblamehistory |