Re: [PATCH -mm -next] ipc,sem: fix lockdep false positive

[Peter Zijlstra]

On Wed, 2013-03-27 at 04:22 -0700, Michel Lespinasse wrote:
> >> Not without breaking your scheme above :)
> >
> > How would making sma->global_lock a mutex wreck anything?
> 
> I don't remember the details (rik probably will), but rcu is also
> already involved, so there is a non trivial chance that it would...

Ah, that might be true, the callsite might not be able to deal with it,
but the proposed global/local lock thing doesn't care -- which is how I
read Rik's comment above.

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