From: Jakub Kicinski kuba@kernel.org
commit 0cbe1e57a7b93517100b0eb63d8e445cfbeb630c upstream.
Similar to the change for rollback_registered() - rollback_registered_many() was a part of unregister_netdevice_many() minus the net_set_todo(), which is no longer needed.
Functionally this patch moves the list_empty() check back after:
BUG_ON(dev_boot_phase); ASSERT_RTNL();
but I can't find any reason why that would be an issue.
Reviewed-by: Edwin Peer edwin.peer@broadcom.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Fedor Pchelkin pchelkin@ispras.ru --- net/core/dev.c | 22 ++++++++-------------- 1 file changed, 8 insertions(+), 14 deletions(-)
diff --git a/net/core/dev.c b/net/core/dev.c index 1fb99ae8cc22..00f970ba0248 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -5709,7 +5709,7 @@ static void flush_all_backlogs(void) }
/* we can have in flight packet[s] on the cpus we are not flushing, - * synchronize_net() in rollback_registered_many() will take care of + * synchronize_net() in unregister_netdevice_many() will take care of * them */ for_each_cpu(cpu, &flush_cpus) @@ -10610,8 +10610,6 @@ void synchronize_net(void) } EXPORT_SYMBOL(synchronize_net);
-static void rollback_registered_many(struct list_head *head); - /** * unregister_netdevice_queue - remove device from the kernel * @dev: device @@ -10635,8 +10633,7 @@ void unregister_netdevice_queue(struct net_device *dev, struct list_head *head) LIST_HEAD(single);
list_add(&dev->unreg_list, &single); - rollback_registered_many(&single); - list_del(&single); + unregister_netdevice_many(&single); } } EXPORT_SYMBOL(unregister_netdevice_queue); @@ -10649,15 +10646,6 @@ EXPORT_SYMBOL(unregister_netdevice_queue); * we force a list_del() to make sure stack wont be corrupted later. */ void unregister_netdevice_many(struct list_head *head) -{ - if (!list_empty(head)) { - rollback_registered_many(head); - list_del(head); - } -} -EXPORT_SYMBOL(unregister_netdevice_many); - -static void rollback_registered_many(struct list_head *head) { struct net_device *dev, *tmp; LIST_HEAD(close_head); @@ -10665,6 +10653,9 @@ static void rollback_registered_many(struct list_head *head) BUG_ON(dev_boot_phase); ASSERT_RTNL();
+ if (list_empty(head)) + return; + list_for_each_entry_safe(dev, tmp, head, unreg_list) { /* Some devices call without registering * for initialization unwind. Remove those @@ -10748,7 +10739,10 @@ static void rollback_registered_many(struct list_head *head) dev_put(dev); net_set_todo(dev); } + + list_del(head); } +EXPORT_SYMBOL(unregister_netdevice_many);
/** * unregister_netdev - remove device from the kernel