tree e19024bf01beaf48c724bcf46fb1774a1a93b0b7
parent b6e6edcfa40561e9c8abe5eecf1c96f8e5fd9c6f
author Johannes Weiner <hannes@cmpxchg.org> 1458249631 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1458252574 -0700

mm: memcontrol: clarify the uncharge_list() loop

uncharge_list() does an unusual list walk because the function can take
regular lists with dedicated list_heads as well as singleton lists where
a single page is passed via the page->lru list node.

This can sometimes lead to confusion as well as suggestions to replace
the loop with a list_for_each_entry(), which wouldn't work.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Vladimir Davydov <vdavydov@virtuozzo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>