mm/migrate: correct failure handling if !hugepage_migration_support()

[firefly-linux-kernel-4.4.55.git] / mm / internal.h

diff --git a/mm/internal.h b/mm/internal.h
index 4390ac6c106e6124d653f18948ec296173527521..a346ba120e4211e49473350c3a933afa26a43625 100644 (file)
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -47,11 +47,9 @@ static inline void __get_page_tail_foll(struct page *page,
         * page_cache_get_speculative()) on tail pages.
         */
        VM_BUG_ON(atomic_read(&page->first_page->_count) <= 0);
-       VM_BUG_ON(atomic_read(&page->_count) != 0);
-       VM_BUG_ON(page_mapcount(page) < 0);
        if (get_page_head)
                atomic_inc(&page->first_page->_count);
-       atomic_inc(&page->_mapcount);
+       get_huge_page_tail(page);
 }
 
 /*
@@ -85,6 +83,8 @@ extern unsigned long highest_memmap_pfn;
  */
 extern int isolate_lru_page(struct page *page);
 extern void putback_lru_page(struct page *page);
+extern unsigned long zone_reclaimable_pages(struct zone *zone);
+extern bool zone_reclaimable(struct zone *zone);
 
 /*
  * in mm/rmap.c: