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[v2,30/31] net: Convert default_device_ops

Message ID 151120301262.3159.17761858998616136080.stgit@localhost.localdomain
State Deferred, archived
Delegated to: David Miller
Headers show
Series Replacing net_mutex with rw_semaphore | expand

Commit Message

Kirill Tkhai Nov. 20, 2017, 6:36 p.m. UTC 
These pernet operations consist of exit() and exit_batch() methods.

default_device_exit() moves not-local and virtual devices to init_net.
There is nothing exiting, because this may happen in any time
on a working system, and rtnl_lock() and synchronize_net() protect
us from all cases of external dereference.

The same for default_device_exit_batch(). Similar unregisteration
may happen in any time on a system. Here several lists (like todo_list),
which are accessed under rtnl_lock(). After rtnl_unlock() and
netdev_run_todo() all the devices are flushed.

Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
---
 net/core/dev.c |    1 +
 1 file changed, 1 insertion(+)
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Patch

diff --git a/net/core/dev.c b/net/core/dev.c
index 41a576a17430..914fdb260aae 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -8757,6 +8757,7 @@  static void __net_exit default_device_exit_batch(struct list_head *net_list)
 static struct pernet_operations __net_initdata default_device_ops = {
 	.exit = default_device_exit,
 	.exit_batch = default_device_exit_batch,
+	.async = true,
 };
 
 /*