Re: [PATCH net-next] caif: annotate phyinfo lookup under config lock

[Jakub Kicinski]

On Fri, 26 Jun 2026 12:24:40 +0800 Runyu Xiao wrote:
> cfcnfg_get_phyinfo_rcu() is used by both RCU read-side paths and config
> update paths that hold cnfg->lock before adding or deleting entries from
> cnfg->phys. The helper walks the list with list_for_each_entry_rcu(),
> but does not tell lockdep about the config-lock-protected callers.
> 
> Pass lockdep_is_held(&cnfg->lock) to the iterator. RCU-reader callers
> remain valid, and CONFIG_PROVE_RCU_LIST can now see the non-RCU
> protection used by the add/delete paths.
> 
> This was found by our static analysis tool and then manually reviewed
> against the current tree. The dynamic triage evidence is a
> target-matched CONFIG_PROVE_RCU_LIST warning; the change is limited
> to documenting the existing protection contract.

This code was removed a couple of releases ago.