Re: [PATCH v2 14/15] drm/amdgpu: Use mmu_range_notifier instead of hmm_mirror

[Jason Gunthorpe <jgg@ziepe.ca>]

On Fri, Nov 01, 2019 at 02:42:21PM -0300, Jason Gunthorpe wrote:
> On Fri, Nov 01, 2019 at 03:59:26PM +0000, Yang, Philip wrote:
> > > This test for range_blockable should be before mutex_lock, I can move
> > > it up
> > > 
> > yes, thanks.
> 
> Okay, I wrote it like this:
> 
> 	if (mmu_notifier_range_blockable(range))
> 		mutex_lock(&adev->notifier_lock);
> 	else if (!mutex_trylock(&adev->notifier_lock))
> 		return false;

Never mind, this routine sleeps for other reasons it should just be as
it was:

	if (!mmu_notifier_range_blockable(range))
		return false;

	mutex_lock(&adev->notifier_lock);

Jason