Re: [patch 7/8] lock validator: s390 use raw_spinlock in mcck handler

[Heiko Carstens]

On Wed, Jun 14, 2006 at 09:25:16PM +0200, Ingo Molnar wrote:
> 
> * Heiko Carstens <heiko.carstens@xxxxxxxxxx> wrote:
> 
> > From: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
> > 
> > Machine checks on s390 are always enabled (except in the machine check 
> > handler itself). Therefore use a raw_spinlock in the machine check 
> > handler to avoid deadlocks in the lock validator.
> 
> hm, couldnt you use the ->lockdep_recursion mechanism to take care of 
> such cases? Just call lockdep_off() when entering a machine exception 
> handler, and lockdep_on() when exiting it.

Ah, sure. Wasn't aware that there is such an interface. Will do.
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