Re: [PATCH] net: wireless: airo semaphore to mutex

[Matthew Wilcox]

On Tue, May 27, 2008 at 11:17:22AM +1000, Rusty Russell wrote:
> On Tuesday 27 May 2008 03:29:14 Michal Schmidt wrote:
> > Mutexes are not allowed in interrupt context, not even mutex_trylock.
> 
> As an aside, does anyone know why?  I know the documentation says so, but it 
> wasn't immediately obvious to me.  I asked before to no response...

Because mutexes have an owner.  In interrupt context, there is no owner.
This owner is used to do priority boosts as well as debugging.

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