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. Signed-off-by: Yisheng Xie <[email protected]> Acked-by: Minchan Kim <[email protected]> Suggested-by: Michal Hocko <[email protected]> Cc: Naoya Horiguchi <[email protected]> Cc: Vlastimil Babka <[email protected]> Cc: Andi Kleen <[email protected]> Cc: Hanjun Guo <[email protected]> Cc: Johannes Weiner <[email protected]> Cc: Joonsoo Kim <[email protected]> Cc: Mel Gorman <[email protected]> Cc: Reza Arbab <[email protected]> Cc: Taku Izumi <[email protected]> Cc: Vitaly Kuznetsov <[email protected]> Cc: Xishi Qiu <[email protected]> --- include/linux/migrate.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/include/linux/migrate.h b/include/linux/migrate.h index 43d5deb..fa76b51 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; } -- 1.7.12.4
