Because nr_pages is unsigned long, it can not be negative. Signed-off-by: Liu Xiang <liuxiang_1999@xxxxxxx> --- 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
