From 6bcdeb8c243c2b9de61f5d03a5a9928d8e2d1749 Mon Sep 17 00:00:00 2001
From: Ken Raeburn <raeburn@raeburn.org>
Date: Sun, 21 Jul 2002 14:11:55 +0000
Subject: [PATCH] comment last change

---
 src/buffer.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/buffer.c b/src/buffer.c
index bf1b49e6ff4..fd2de4a2408 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -4669,7 +4669,11 @@ mmap_realloc (var, nbytes)
       else if (room - nbytes >= mmap_page_size)
 	{
 	  /* Shrinking by at least a page.  Let's give some
-	     memory back to the system.  */
+	     memory back to the system.
+
+	     The extra parens are to make the division happens first,
+	     on positive values, so we know it will round towards
+	     zero.  */
 	  mmap_enlarge (r, - ((room - nbytes) / mmap_page_size));
 	  result = *var;
 	  r->nbytes_specified = nbytes;
-- 
2.39.5