Module Name: src
Committed By: gdt
Date: Mon Dec 21 19:04:36 UTC 2009
Modified Files:
src/share/man/man4: ugen.4
Log Message:
In the introduction, point out that RA_WB is intended for recurring
fixed-sized transfers. Clarification requested by po...@.
To generate a diff of this commit:
cvs rdiff -u -r1.27 -r1.28 src/share/man/man4/ugen.4
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/share/man/man4/ugen.4
diff -u src/share/man/man4/ugen.4:1.27 src/share/man/man4/ugen.4:1.28
--- src/share/man/man4/ugen.4:1.27 Fri Apr 10 15:07:08 2009
+++ src/share/man/man4/ugen.4 Mon Dec 21 19:04:36 2009
@@ -1,4 +1,4 @@
-.\" $NetBSD: ugen.4,v 1.27 2009/04/10 15:07:08 joerg Exp $
+.\" $NetBSD: ugen.4,v 1.28 2009/12/21 19:04:36 gdt Exp $
.\"
.\" Copyright (c) 1999 The NetBSD Foundation, Inc.
.\" All rights reserved.
@@ -118,6 +118,8 @@
.Xr ioctl 2
calls are available, and enable read-ahead and write-behind buffering
respectively.
+This buffering supports fixed-sized USB transfers and is intended for
+devices with regular and continuing data transfers.
When read-ahead or write-behind are enabled, the file descriptor
may be set to use non-blocking IO.
.Pp
