Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.

===================================================================
RCS file: /ftp/cvs/cvsroot/src/sys/kern/uipc_socket.c,v
retrieving revision 1.153
retrieving revision 1.154
diff -u -p -r1.153 -r1.154
--- src/sys/kern/uipc_socket.c	2008/03/01 14:16:51	1.153
+++ src/sys/kern/uipc_socket.c	2008/03/20 19:23:15	1.154
@@ -1,7 +1,7 @@
-/*	$NetBSD: uipc_socket.c,v 1.153 2008/03/01 14:16:51 rmind Exp $	*/
+/*	$NetBSD: uipc_socket.c,v 1.154 2008/03/20 19:23:15 ad Exp $	*/
 
 /*-
- * Copyright (c) 2002, 2007 The NetBSD Foundation, Inc.
+ * Copyright (c) 2002, 2007, 2008 The NetBSD Foundation, Inc.
  * All rights reserved.
  *
  * This code is derived from software contributed to The NetBSD Foundation
@@ -68,7 +68,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: uipc_socket.c,v 1.153 2008/03/01 14:16:51 rmind Exp $");
+__KERNEL_RCSID(0, "$NetBSD: uipc_socket.c,v 1.154 2008/03/20 19:23:15 ad Exp $");
 
 #include "opt_sock_counters.h"
 #include "opt_sosend_loan.h"
@@ -1802,6 +1802,59 @@ soo_kqfilter(struct file *fp, struct kno
 	return (0);
 }
 
+static int
+sodopoll(struct socket *so, int events)
+{
+	int revents;
+
+	revents = 0;
+
+	if (events & (POLLIN | POLLRDNORM))
+		if (soreadable(so))
+			revents |= events & (POLLIN | POLLRDNORM);
+
+	if (events & (POLLOUT | POLLWRNORM))
+		if (sowritable(so))
+			revents |= events & (POLLOUT | POLLWRNORM);
+
+	if (events & (POLLPRI | POLLRDBAND))
+		if (so->so_oobmark || (so->so_state & SS_RCVATMARK))
+			revents |= events & (POLLPRI | POLLRDBAND);
+
+	return revents;
+}
+
+int
+sopoll(struct socket *so, int events)
+{
+	int revents = 0;
+	int s;
+
+	if ((revents = sodopoll(so, events)) != 0)
+		return revents;
+
+	KERNEL_LOCK(1, curlwp);
+	s = splsoftnet();
+
+	if ((revents = sodopoll(so, events)) == 0) {
+		if (events & (POLLIN | POLLPRI | POLLRDNORM | POLLRDBAND)) {
+			selrecord(curlwp, &so->so_rcv.sb_sel);
+			so->so_rcv.sb_flags |= SB_SEL;
+		}
+
+		if (events & (POLLOUT | POLLWRNORM)) {
+			selrecord(curlwp, &so->so_snd.sb_sel);
+			so->so_snd.sb_flags |= SB_SEL;
+		}
+	}
+
+	splx(s);
+	KERNEL_UNLOCK_ONE(curlwp);
+
+	return revents;
+}
+
+
 #include <sys/sysctl.h>
 
 static int sysctl_kern_somaxkva(SYSCTLFN_PROTO);