Re: [PATCH] drm: fb-helper: Avoid nesting spinlock_t into raw_spinlock_t

[Sebastian Siewior]

On 2022-02-15 20:59:24 [+0100], Jiri Kosina wrote:
> Thanks for confirmation, seems like this problem is indeed cured by your 
> series.

Oki.

> I still believe though that we shouldn't let 5.17 released with this 
> warning being emitted into dmesg, so I'd suggest going with my patch for 
> mainline, and revert it in your series on top of it.

No. That warning is only visible with CONFIG_PROVE_RAW_LOCK_NESTING with
the following paragraph in its help:
|   NOTE: There are known nesting problems. So if you enable this
|   option expect lockdep splats until these problems have been fully
|   addressed which is work in progress. This config switch allows to
|   identify and analyze these problems. It will be removed and the
|   check permanently enabled once the main issues have been fixed.

This warning in this call chain should affect every console driver which
acquires a lock.

> Thanks,

Sebastian