Merge branch 'rs/use-div-round-up'

Code cleanup.

* rs/use-div-round-up:
  use DIV_ROUND_UP

builtin/log.c

@@ -1308,7 +1308,7 @@ static struct commit *get_base_commit(const char *base_commit,
 
 		if (rev_nr % 2)
 			rev[i] = rev[2 * i];
-		rev_nr = (rev_nr + 1) / 2;
+		rev_nr = DIV_ROUND_UP(rev_nr, 2);
 	}
 
 	if (!in_merge_bases(base, rev[0]))