On Thu, Feb 4, 2021 at 8:39 AM Muchun Song [off-list ref] wrote:

The rule of list walk has gone since:

 commit a9d5adeeb4b2 ("mm/memcontrol: allow to uncharge page without using page->lru field")

So remove the strange comment and replace the loop with a
list_for_each_entry().

There is only one caller of the uncharge_list(). So just fold it into
mem_cgroup_uncharge_list() and remove it.

Signed-off-by: Muchun Song <redacted>

Reviewed-by: Shakeel Butt <redacted>