Re: [PATCH net-next 06/12] net: dsa: rzn1-a5psw: add Renesas RZ/N1 advanced 5 port switch driver

Vladimir Oltean
2022-04-15T12:42:06Z

On Fri, Apr 15, 2022 at 02:28:57PM +0200, Clément Léger wrote:
> > Most things as seen by a DSA switch driver are implicitly serialized by
> > the rtnl_mutex anyway.
>
> Is there a list of the functions that are protected by the RTNL lock
> without having to deep dive in the whole stacks ? That would be really
> useful to remove useless locking from my driver. But I guess I'll have
> to look at other drivers to see that.

No, there isn't, but in Documentation/networking/dsa/dsa.rst we do have
a list of dsa_switch_ops functions which used to be comprehensive
(but now needs to be updated again due to development that happened in
the meantime). I suppose that if you do a thorough job of documenting
the synchronization rules, you could add that information to this file.
This would be similar to how we have the "struct net_device synchronization
rules" section in Documentation/networking/netdevices.rst.