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Date: Fri, 3 Feb 2017 15:59:28 +0800 From: Yisheng Xie <xieyisheng1@...wei.com> To: <linux-mm@...ck.org>, <linux-kernel@...r.kernel.org>, <akpm@...ux-foundation.org> CC: <mhocko@...nel.org>, <minchan@...nel.org>, <ak@...ux.intel.com>, <guohanjun@...wei.com>, <hannes@...xchg.org>, <iamjoonsoo.kim@....com>, <mgorman@...hsingularity.net>, <n-horiguchi@...jp.nec.com>, <arbab@...ux.vnet.ibm.com>, <izumi.taku@...fujitsu.com>, <vkuznets@...hat.com>, <vbabka@...e.cz>, <qiuxishi@...wei.com> Subject: [PATCH v6 2/4] 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. Signed-off-by: Yisheng Xie <xieyisheng1@...wei.com> Acked-by: Minchan Kim <minchan@...nel.org> Suggested-by: Michal Hocko <mhocko@...nel.org> Cc: Naoya Horiguchi <n-horiguchi@...jp.nec.com> Cc: Vlastimil Babka <vbabka@...e.cz> Cc: Andi Kleen <ak@...ux.intel.com> Cc: Hanjun Guo <guohanjun@...wei.com> Cc: Johannes Weiner <hannes@...xchg.org> Cc: Joonsoo Kim <iamjoonsoo.kim@....com> Cc: Mel Gorman <mgorman@...hsingularity.net> Cc: Reza Arbab <arbab@...ux.vnet.ibm.com> Cc: Taku Izumi <izumi.taku@...fujitsu.com> Cc: Vitaly Kuznetsov <vkuznets@...hat.com> Cc: Xishi Qiu <qiuxishi@...wei.com> --- 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
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