tree f0b43899dfc3383cf8c73c10eaf9079972066f87
parent 54f18d35263334ebcc6bf409fee3c0c8c22e5588
author Andrew Morton <akpm@linux-foundation.org> 1463703103 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1463710334 -0700

mm/mempolicy.c:offset_il_node() document and clarify

This code was pretty obscure and was relying upon obscure side-effects
of next_node(-1, ...) and was relying upon NUMA_NO_NODE being equal to
-1.

Clean that all up and document the function's intent.

Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Xishi Qiu <qiuxishi@huawei.com>
Cc: Joonsoo Kim <js1304@gmail.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Laura Abbott <lauraa@codeaurora.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>