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authorYisheng Xie <xieyisheng1@huawei.com>2017-02-24 14:57:32 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2017-02-24 17:46:55 -0800
commitcbae0170e5329c79c0a36a81fedd2800146aca12 (patch)
treea0f1bba28784432b974d96dbd6e6c11c0ae25edf
parent9e5bcd610ffcedf5e485e78a72762810b25c7f25 (diff)
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 <xieyisheng1@huawei.com> Acked-by: Minchan Kim <minchan@kernel.org> Suggested-by: Michal Hocko <mhocko@kernel.org> Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Andi Kleen <ak@linux.intel.com> Cc: Hanjun Guo <guohanjun@huawei.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: Reza Arbab <arbab@linux.vnet.ibm.com> Cc: Taku Izumi <izumi.taku@jp.fujitsu.com> Cc: Vitaly Kuznetsov <vkuznets@redhat.com> Cc: Xishi Qiu <qiuxishi@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--include/linux/migrate.h2
1 files changed, 2 insertions, 0 deletions
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; }