Re: [PATCH net-next v2] rtnetlink: comment the RCU waits in unregister paths

[kuniyu]

On Thu, 15 Oct 2026 10:17:16 +0200, Andrea Parri wrote:
> rtnl_unregister_all() and rtnl_af_unregister() wait for RCU readers
> before tearing down what those readers use, but do not say which
> readers they are waiting for.
> 
> A missing wait is then easy to overlook: rtnl_link_unregister() lacked
> its synchronize_rcu() until commit 3b70edea393d ("rtnetlink: wait for
> RCU readers in rtnl_link_unregister()"). Add a comment to both waits,
> naming the readers each one waits for.
> 
> Suggested-by: Eric Dumazet <edumazet@xxxxxxxxxx>
> Link: https://lore.kernel.org/CAL4WiioFMQN4troVjQjCmE6Z9kwwb95SnoEupjD=PPSK6Q5f6w@xxxxxxxxxxxxxx
> Assisted-by: LLM
> Signed-off-by: Andrea Parri <parri.andrea@xxxxxxxxx>

Reviewed-by: Kuniyuki Iwashima <kuniyu@xxxxxxxxxx>