Re: [PATCH 0/3] hrtimer: HRTIMER_STATE_ fixes

[Peter Zijlstra]

On Mon, 2015-06-08 at 19:11 +0200, Thomas Gleixner wrote:

> > Ah, yes, we could introduce timerqueue_is_queued() which uses
> > RB_EMPTY_NODE(). Obviating the need for hrtimer::state entirely.
> 
> Which won't work for the migration case unless we have some trickery
> like we do with double linked lists (not setting the prev member to
> NULL on dequeue).

Yeah, that dawned on me while away from the computer.

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