diff options
Diffstat (limited to 'include/linux/mm.h')
| -rw-r--r-- | include/linux/mm.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index d46d5585e2a2..9238548bdec5 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -811,6 +811,12 @@ static inline unsigned long page_size(struct page *page) return PAGE_SIZE << compound_order(page); } +/* Returns the number of bits needed for the number of bytes in a page */ +static inline unsigned int page_shift(struct page *page) +{ + return PAGE_SHIFT + compound_order(page); +} + void free_compound_page(struct page *page); #ifdef CONFIG_MMU |