diff options
Diffstat (limited to 'backport/backport-include/linux/page_ref.h')
| -rw-r--r-- | backport/backport-include/linux/page_ref.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/backport/backport-include/linux/page_ref.h b/backport/backport-include/linux/page_ref.h index 55fc14f5..e45734ec 100644 --- a/backport/backport-include/linux/page_ref.h +++ b/backport/backport-include/linux/page_ref.h @@ -8,6 +8,16 @@ static inline void page_ref_inc(struct page *page) { atomic_inc(&page->_count); } + +static inline int page_ref_count(struct page *page) +{ + return atomic_read(&page->_count); +} + +static inline int page_ref_sub_and_test(struct page *page, int nr) +{ + return atomic_sub_and_test(nr, &page->_count); +} #endif #endif /* __BP_PAGE_REF_H */ |