diff options
Diffstat (limited to 'mm/internal.h')
| -rw-r--r-- | mm/internal.h | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/mm/internal.h b/mm/internal.h index 7bb33977981..d20e3cc4aef 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -13,8 +13,19 @@ #include <linux/mm.h> -static inline void set_page_refs(struct page *page, int order) +static inline void set_page_count(struct page *page, int v) { + atomic_set(&page->_count, v); +} + +/* + * Turn a non-refcounted page (->_count == 0) into refcounted with + * a count of one. + */ +static inline void set_page_refcounted(struct page *page) +{ + BUG_ON(PageCompound(page) && page_private(page) != (unsigned long)page); + BUG_ON(atomic_read(&page->_count)); set_page_count(page, 1); } |