While updating the architectures to properly use 5-level folded page tables without <asm-generic/?level-fixup.h> and <asm-generic/pgtable-nop4d-hack.h> I wondered if we can do better than explicitly name each and every level of the page table, open-code traversal of all the layers numerous times and have copied do_something_pXd_range(). Then I've come across Kirill's "Proof-of-concept: better(?) page-table manipulation API" [1], but as far as I could see there was no progress since then. I'd like to resurrect the topic and try to see if we can come up with actually better page table manipulation API. [1] https://lore.kernel.org/lkml/20180424154355.mfjgkf47kdp2by4e@xxxxxxxxxxxxxxxxxx/ -- Sincerely yours, Mike.
