diff options
-rw-r--r-- | mm/gup.c | 7 |
1 files changed, 5 insertions, 2 deletions
@@ -68,7 +68,10 @@ static void put_page_refs(struct page *page, int refs) */ static inline struct page *try_get_compound_head(struct page *page, int refs) { - struct page *head = compound_head(page); + struct page *head; + +retry: + head = compound_head(page); if (WARN_ON_ONCE(page_ref_count(head) < 0)) return NULL; @@ -86,7 +89,7 @@ static inline struct page *try_get_compound_head(struct page *page, int refs) */ if (unlikely(compound_head(page) != head)) { put_page_refs(head, refs); - return NULL; + goto retry; } return head; |