[PATCH 4/15] ptwalk: unuse_mm

Convert unuse_process pagetable walkers to loops using p?d_addr_end; but correct its name to unuse_mm, rename its levels to _range as elsewhere. Leave unuse_pte out-of-line since it's so rarely called; but move the funny activate_page inside it. foundaddr was a leftover from before: we still

[PATCH 4/15] ptwalk: unuse_mm

Convert unuse_process pagetable walkers to loops using p?d_addr_end; but correct its name to unuse_mm, rename its levels to _range as elsewhere. Leave unuse_pte out-of-line since it's so rarely called; but move the funny activate_page inside it. foundaddr was a leftover from before: we still