diff options
| -rw-r--r-- | mm/gup.c | 7 |
1 files changed, 7 insertions, 0 deletions
@@ -329,6 +329,13 @@ void unpin_user_pages(struct page **pages, unsigned long npages) unsigned long index; /* + * If this WARN_ON() fires, then the system *might* be leaking pages (by + * leaving them pinned), but probably not. More likely, gup/pup returned + * a hard -ERRNO error to the caller, who erroneously passed it here. + */ + if (WARN_ON(IS_ERR_VALUE(npages))) + return; + /* * TODO: this can be optimized for huge pages: if a series of pages is * physically contiguous and part of the same compound page, then a * single operation to the head page should suffice. |