Re: [RFC PATCH 10/10] x86/unwind: add undwarf unwinder

[Josh Poimboeuf]

On Thu, Jun 01, 2017 at 03:12:04PM +0200, Peter Zijlstra wrote:
> > Based on your previous comment I was thinking I would disable preemption
> > for the entire unwind_next_frame() step, but not *between* steps.  I
> > suppose we could require the unwind caller to disable preemption but I'd
> > like to avoid that if possible.
> 
> Right, keeping it disabled across a frame should be ok I suppose.

But then we'd either have to require the unwind user to explicitly
disable preemption, or we'd need to add a new unwind_end() interface
which the caller would be required to use when they're done unwinding.
Neither is ideal.

-- 
Josh