diff options
Diffstat (limited to 'mm/internal.h')
| -rw-r--r-- | mm/internal.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/mm/internal.h b/mm/internal.h index a3110c02aea7..953f941ea867 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -37,4 +37,14 @@ static inline void __put_page(struct page *page) extern void fastcall __init __free_pages_bootmem(struct page *page, unsigned int order); +/* + * function for dealing with page's order in buddy system. + * zone->lock is already acquired when we use these. + * So, we don't need atomic page->flags operations here. + */ +static inline unsigned long page_order(struct page *page) +{ + VM_BUG_ON(!PageBuddy(page)); + return page_private(page); +} #endif |