On Wed,  7 Mar 2018 11:32:27 -0700 Toshi Kani [off-list ref] wrote:

Implement pud_free_pmd_page() and pmd_free_pte_page() on x86, which
clear a given pud/pmd entry and free up lower level page table(s).
Address range associated with the pud/pmd entry must have been purged
by INVLPG.

OK, now we have implementations which match the naming ;) Again, is a
cc:stable warranted?

Do you have any preferences/suggestions as to which tree these should
be merged through?  You're hitting core, arm and x86.