From cbae0170e5329c79c0a36a81fedd2800146aca12 Mon Sep 17 00:00:00 2001 From: Yisheng Xie Date: Fri, 24 Feb 2017 14:57:32 -0800 Subject: mm/migration: make isolate_movable_page always defined Define isolate_movable_page as a static inline function when CONFIG_MIGRATION is not enable. It should return -EBUSY here which means failed to isolate movable pages. This patch do not have any functional change but prepare for later patch. Link: http://lkml.kernel.org/r/1485867981-16037-3-git-send-email-ysxie@foxmail.com Signed-off-by: Yisheng Xie Acked-by: Minchan Kim Suggested-by: Michal Hocko Cc: Naoya Horiguchi Cc: Vlastimil Babka Cc: Andi Kleen Cc: Hanjun Guo Cc: Johannes Weiner Cc: Joonsoo Kim Cc: Mel Gorman Cc: Reza Arbab Cc: Taku Izumi Cc: Vitaly Kuznetsov Cc: Xishi Qiu Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/migrate.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/linux/migrate.h') diff --git a/include/linux/migrate.h b/include/linux/migrate.h index 43d5deb0c4cc..fa76b516fa47 100644 --- a/include/linux/migrate.h +++ b/include/linux/migrate.h @@ -56,6 +56,8 @@ static inline int migrate_pages(struct list_head *l, new_page_t new, free_page_t free, unsigned long private, enum migrate_mode mode, int reason) { return -ENOSYS; } +static inline int isolate_movable_page(struct page *page, isolate_mode_t mode) + { return -EBUSY; } static inline int migrate_prep(void) { return -ENOSYS; } static inline int migrate_prep_local(void) { return -ENOSYS; } -- cgit