MM: use DIV_ROUND_UP() in mm/memory.c

Replace a hand coded version of DIV_ROUND_UP().

Signed-off-by: Rolf Eike Beer <eike-kernel@sf-tec.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/memory.c b/mm/memory.c
index f64cbf9..ee29259 100644 (file)
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -2673,7 +2673,7 @@ int make_pages_present(unsigned long addr, unsigned long end)
        write = (vma->vm_flags & VM_WRITE) != 0;
        BUG_ON(addr >= end);
        BUG_ON(end > vma->vm_end);
-       len = (end+PAGE_SIZE-1)/PAGE_SIZE-addr/PAGE_SIZE;
+       len = DIV_ROUND_UP(end, PAGE_SIZE) - addr/PAGE_SIZE;
        ret = get_user_pages(current, current->mm, addr,
                        len, write, 0, NULL, NULL);
        if (ret < 0)