On Fri, Aug 29, 2014 at 02:01:00PM +0200, David Herrmann wrote: > There is no reason to use a heavy mutex for idr protection. Use a spinlock > and make idr-allocation use idr_preload(). > > This patch also makes mode-object lookup irq-save, in case you ever wanna > lookup modeset objects from interrupts. This is just a side-effect of > avoiding a mutex. I don't think that's entirely accurate. idr_preload(GFP_KERNEL) might sleep since GFP_KERNEL & __GFP_WAIT != 0. Thierry
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