[src/trunk]: src/sys/sys add a comment.

[yamt <yamt%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/52f476ac64e2
branches:  trunk
changeset: 580047:52f476ac64e2
user:      yamt <yamt%NetBSD.org@localhost>
date:      Wed Apr 06 13:13:05 2005 +0000

description:
add a comment.

diffstat:

 sys/sys/blist.h |  7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)

diffs (21 lines):

diff -r 69c6c8208d28 -r 52f476ac64e2 sys/sys/blist.h
--- a/sys/sys/blist.h   Wed Apr 06 13:09:10 2005 +0000
+++ b/sys/sys/blist.h   Wed Apr 06 13:13:05 2005 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: blist.h,v 1.5 2005/04/06 13:09:10 yamt Exp $   */
+/*     $NetBSD: blist.h,v 1.6 2005/04/06 13:13:05 yamt Exp $   */
 
 /*-
  * Copyright (c) 1998 Matthew Dillon.  All Rights Reserved.
@@ -57,6 +57,11 @@
 #ifndef _SYS_BLIST_H_
 #define _SYS_BLIST_H_
 
+/*
+ * for space efficiency, sizeof(blist_bitmap_t) should be
+ * greater than or equal to sizeof(blist_blkno_t).
+ */
+
 typedef uint32_t blist_bitmap_t;
 typedef uint32_t blist_blkno_t;