[PATCH v2 1/1] fbdev/core: Disable console-lock warnings when fb.lockless_register_fb is set

[Thomas Zimmermann]

Hi

Am 19.07.2018 um 12:05 schrieb Sergey Senozhatsky:
> On (07/19/18 10:53), Petr Mladek wrote:
>> Hmm, this approach is racy if there are other users
>> saving/setting/restoring ignore_console_lock_warning in parallel.
>> I mean that this works only when the entire safe/set/restore
>> operation is nested or sequential.
> 
> Good point!
> 
> However, I tend to think that we don't need to care about it
> that much. Having a counter to permit nesting would probably be
> better, but, like you said, it's unlikely that we will see any
> problems with ignore_console_lock_warning anyway. So we can keep
> it simple [IOW - the way it is].

I just sent a new patch set based on atomic_t and TBH it's easier to use
that this version. I only had to introduce the save-state variable in
the caller because I couldn't do inc/dec.

Best regards
Thomas

> 
> 	-ss
> 

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Linux GmbH, Maxfeldstr. 5, D-90409 Nürnberg
Tel: +49-911-74053-0; Fax: +49-911-7417755;  https://www.suse.com/
SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard,
Graham Norton, HRB 21284 (AG Nürnberg)

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