Re: [PATCH v5 2/3] fbcon: Call WARN_CONSOLE_UNLOCKED() where applicable

[Sergey Senozhatsky]

Hi,

On (07/11/18 16:46), Thomas Zimmermann wrote:
> Am 28.06.2018 um 11:03 schrieb Hans de Goede:
> > Replace comments about places where the console lock should be held with
> > calls to WARN_CONSOLE_UNLOCKED() to assert that it is actually held.
> 
> Debugging fbcon sometimes requires to not take the console lock. This
> patch breaks the debugging workaround provided by
> 'fb.lockless_register_fb'. The dmesg is now filled with warnings about
> the missing lock.

Hmm. I once dealt with WARN_CONSOLE_UNLOCKED(), and back then, IIRC,
I really wanted to turn it into WARN_ONCE_CONSOLE_UNLOCKED(), which
would WARN_ON_ONCE() instead of WARN_ON(). It's just a bit too noisy
and verbose and a single backtrace was already enough.

	-ss