Because nr_pages is unsigned long, it can not be negative.

Signed-off-by: Liu Xiang <liuxiang_1...@126.com>
---
 mm/gup.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/mm/gup.c b/mm/gup.c
index 8f236a3..0236954 100644
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -735,10 +735,10 @@ static int check_vma_flags(struct vm_area_struct *vma, 
unsigned long gup_flags)
  * @nonblocking: whether waiting for disk IO or mmap_sem contention
  *
  * Returns number of pages pinned. This may be fewer than the number
- * requested. If nr_pages is 0 or negative, returns 0. If no pages
- * were pinned, returns -errno. Each page returned must be released
- * with a put_page() call when it is finished with. vmas will only
- * remain valid while mmap_sem is held.
+ * requested. If nr_pages is 0, returns 0. If no pages were pinned,
+ * returns -errno. Each page returned must be released with a
+ * put_page() call when it is finished with. vmas will only remain
+ * valid while mmap_sem is held.
  *
  * Must be called with mmap_sem held.  It may be released.  See below.
  *
-- 
1.9.1

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