Re: [PATCH 1/7] regulator: push allocation in regulator_init_coupling() outside of lock

From: Dmitry Osipenko
Date: Tue Aug 11 2020 - 12:27:48 EST

11.08.2020 18:59, Dmitry Osipenko пишет:
> 11.08.2020 04:07, Michał Mirosław пишет:
>> Allocating memory with regulator_list_mutex held makes lockdep unhappy
>> when memory pressure makes the system do fs_reclaim on eg. eMMC using
>> a regulator. Push the lock inside regulator_init_coupling() after the
>> allocation.
> ...
> Reviewed-by: Dmitry Osipenko <digetx@xxxxxxxxx>

On the other hand, couldn't it be better to just remove taking the
list_mutex from the regulator_lock_dependent()?

I think the list_mutex is only needed to protect from supply/couple
regulator being removed during of the locking process, but maybe this is
not something we should worry about?