| Message ID | 20181202115226.3594-3-hauke@hauke-m.de (mailing list archive) |
|---|---|
| State | Accepted |
| Headers | show |
| Series | backports: Multiple fixes for kernel 4.20 | expand |
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 */
This was introduced in kernel commit fe896d18789 ("mm: introduce page reference manipulation functions") and will be used by __page_frag_cache_drain() in the next commit. Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> --- backport/backport-include/linux/page_ref.h | 10 ++++++++++ 1 file changed, 10 insertions(+)