[PATCH v2 hmm 1/9] mm/hmm: remove pgmap checking for devmap pages

From: Jason Gunthorpe 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. Reviewed-by

[PATCH v2 hmm 1/9] mm/hmm: remove pgmap checking for devmap pages

From: Jason Gunthorpe 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. Reviewed-by