Re: [RFC][PATCH] request_irq(...,SA_BOOTMEM);

[Andrew Morton]

On Mon, 05 Jun 2006 18:49:36 +1000
Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx> wrote:

> > And yes, the mutex code will (with debug enabled) unconditionally enable
> > interrupts.  ppc64 tends to oops when this happens, in the timer handler
> > (so it'll be intermittent...)
> 
> I tend to say that any code that hard-enables interrupts is looking for
> trouble (mostly for that very reason of init stuff).

Usually.  But it's 100% daft to be preserving local irq state in
mutex_lock().
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