Re: [PATCH v3 8/8] block: Assign a lock_class per gendisk used for wait_for_completion()

[Ingo Molnar]

* Byungchul Park <byungchul.p...@lge.com> wrote:

> > Isn't lockdep_map a zero size structure that is always defined? If yes then 
> > there's no need for an #ifdef.
> 
> No, a zero size structure for lockdep_map is not provided yet.
> There are two options I can do:
> 
> 1. Add a zero size structure for lockdep_map and remove #ifdef
> 2. Replace CONFIG_LOCKDEP_COMPLETIONS with CONFIG_LOCKDEP here.
> 
> Or something else?
> 
> Which one do you prefer?

Ok, could we try #1 in a new patch and re-spin the simplified block layer patch 
on 
top of that?

The less ugly a debug facility's impact on unrelated kernel is, the better - 
especially when it comes to annotating false positives.

Thanks,

        Ingo