On Wed, Feb 03, 2021 at 11:47:48AM +0100, Oscar Salvador wrote:

remove_pte_table() is prepared to handle the case where either the
start or the end of the range is not PAGE aligned.
This cannot actually happen:

__populate_section_memmap enforces the range to be PMD aligned,
so as long as the size of the struct page remains multiple of 8,
the vmemmap range will be aligned to PAGE_SIZE.

Drop the dead code and place a VM_BUG_ON in vmemmap_{populate,free}
to catch nasty cases.

Signed-off-by: Oscar Salvador <osalvador@suse.de>
Suggested-by: David Hildenbrand <redacted>

Hi Andrew, 

the cover letter got lost somehow, but is this patchset, [1] and [2]
on your radar?

[1] https://lore.kernel.org/linux-mm/20210204134325.7237-3-osalvador@suse.de/ (local)
[2] https://lore.kernel.org/linux-mm/20210204134325.7237-4-osalvador@suse.de/ (local)

thanks


-- 
Oscar Salvador
SUSE L3