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Kuniyuki Iwashima says:
====================
rtnetlink: Handle error of rtnl_register_module().
While converting phonet to per-netns RTNL, I found a weird comment
/* Further rtnl_register_module() cannot fail */
that was true but no longer true after commit addf9b90de ("net:
rtnetlink: use rcu to free rtnl message handlers").
Many callers of rtnl_register_module() just ignore the returned
value but should handle them properly.
This series introduces two helpers, rtnl_register_many() and
rtnl_unregister_many(), to do that easily and fix such callers.
All rtnl_register() and rtnl_register_module() will be converted
to _many() variant and some rtnl_lock() will be saved in _many()
later in net-next.
Changes:
v4:
* Add more context in changelog of each patch
v3: https://lore.kernel.org/all/20241007124459.5727-1-kuniyu@amazon.com/
* Move module *owner to struct rtnl_msg_handler
* Make struct rtnl_msg_handler args/vars const
* Update mctp goto labels
v2: https://lore.kernel.org/netdev/20241004222358.79129-1-kuniyu@amazon.com/
* Remove __exit from mctp_neigh_exit().
v1: https://lore.kernel.org/netdev/20241003205725.5612-1-kuniyu@amazon.com/
====================
Link: https://patch.msgid.link/20241008184737.9619-1-kuniyu@amazon.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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