* David Brownell <david-b@pacbell.net> wrote:

quoted text
> > > I speculate that either the design has changed (without fanfare), 
> > > or else that stuff is in RT kernels and has not yet gone upstream.
> > 
> > Well whatever.  We shouldn't have to resort to caller-side party 
> > tricks like this to get acceptable performance.
> 
> I'd be happy if, as originally presented, it were possible to just 
> pass a raw_spinlock_t to spin_lock_irqsave() and friends.

that's a spinlock type abstraction of PREEMPT_RT, not of mainline. In 
mainline there's basically almost never any valid reason to use a raw 
spinlock - please use spinlock_t instead. Why do you want to use 
raw_spinlock_t?

	Ingo
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