From: Ken Raeburn <raeburn@raeburn.org>
Date: Sun, 21 Jul 2002 14:11:55 +0000 (+0000)
Subject: comment last change
X-Git-Tag: ttn-vms-21-2-B4~13944
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=6bcdeb8c243c2b9de61f5d03a5a9928d8e2d1749;p=emacs.git

comment last change
---

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;