cifs: fix up get_numpages

Use DIV_ROUND_UP. Also, PAGE_SIZE is more appropriate here since these
aren't pagecache pages.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru>

diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 70bd546..5633202 100644 (file)
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -2071,9 +2071,7 @@ size_t get_numpages(const size_t wsize, const size_t len, size_t *cur_len)
        size_t clen;
 
        clen = min_t(const size_t, len, wsize);
-       num_pages = clen / PAGE_CACHE_SIZE;
-       if (clen % PAGE_CACHE_SIZE)
-               num_pages++;
+       num_pages = DIV_ROUND_UP(clen, PAGE_SIZE);
 
        if (cur_len)
                *cur_len = clen;