Re: [PATCH v4 1/2] mm/migration: make isolate_movable_page always defined

From: Yisheng Xie
Date: Mon Jan 30 2017 - 10:00:40 EST

Hiï Michalï
Sorry for late reply.

On 01/26/2017 05:18 PM, Michal Hocko wrote:
> On Wed 25-01-17 23:05:37, ysxie@xxxxxxxxxxx wrote:
>> From: Yisheng Xie <xieyisheng1@xxxxxxxxxx>
>> Define isolate_movable_page as a static inline function when
>> CONFIG_MIGRATION is not enable. It should return false
>> here which means failed to isolate movable pages.
>> This patch do not have any functional change but prepare for
>> later patch.
> I think it would make more sense to make isolate_movable_page return int
> and have the same semantic as __isolate_lru_page. This would be a better
> preparatory patch for the later work.
Yes, I think you are right, it is better to make isolate_movable_page return int
just as what isolate_lru_page do, to make a better code style.

It seems Andrew had already merged the fixed patch from Arnd Bergmann,
Maybe I can rewrite it in a later patch if it is suitable :)