1 files changed, 14 insertions, 0 deletions

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index f64e7bcb43b7..2c6d5f64feca 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -3925,6 +3925,20 @@ static struct page *__page_frag_refill(struct page_frag_cache *nc,
         return page;
 }
 
+void __page_frag_drain(struct page *page, unsigned int order,
+                       unsigned int count)
+{
+        VM_BUG_ON_PAGE(page_ref_count(page) == 0, page);
+
+        if (page_ref_sub_and_test(page, count)) {
+                if (order == 0)
+                        free_hot_cold_page(page, false);
+                else
+                        __free_pages_ok(page, order);
+        }
+}
+EXPORT_SYMBOL(__page_frag_drain);
+
 void *__alloc_page_frag(struct page_frag_cache *nc,
                         unsigned int fragsz, gfp_t gfp_mask)
 {