I used the clang-tidy qemu-round check to generate the fix:
https://github.com/elmarco/clang-tools-extra

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Acked-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
---
 monitor.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/monitor.c b/monitor.c
index e0f880107f..135ec2de8f 100644
--- a/monitor.c
+++ b/monitor.c
@@ -1349,7 +1349,7 @@ static void memory_dump(Monitor *mon, int count, int format, int wsize,
 
     switch(format) {
     case 'o':
-        max_digits = (wsize * 8 + 2) / 3;
+        max_digits = DIV_ROUND_UP(wsize * 8, 3);
         break;
     default:
     case 'x':
@@ -1357,7 +1357,7 @@ static void memory_dump(Monitor *mon, int count, int format, int wsize,
         break;
     case 'u':
     case 'd':
-        max_digits = (wsize * 8 * 10 + 32) / 33;
+        max_digits = DIV_ROUND_UP(wsize * 8 * 10, 33);
         break;
     case 'c':
         wsize = 1;
-- 
2.14.1.146.gd35faa819