[PATCH hmm 1/6] mm/hmm: remove pgmap checking for devmap pages

[Christoph Hellwig]

On Fri, Mar 20, 2020 at 01:49:00PM -0300, Jason Gunthorpe wrote:
> From: Jason Gunthorpe <jgg at mellanox.com>
> 
> The checking boils down to some racy check if the pagemap is still
> available or not. Instead of checking this, rely entirely on the
> notifiers, if a pagemap is destroyed then all pages that belong to it must
> be removed from the tables and the notifiers triggered.
> 
> Signed-off-by: Jason Gunthorpe <jgg at mellanox.com>

Looks good,

Reviewed-by: Christoph Hellwig <hch at lst.de>