--- src/lib/libkvm/kvm_proc.c	2007/05/08 02:31:36	1.14
+++ src/lib/libkvm/kvm_proc.c	2007/05/09 04:33:50	1.15
@@ -113,6 +113,23 @@ kinfo_resize_proc(kvm_t *kd, struct kinf
 }
 
 /*
+ * note: this function is also used by /usr/src/sys/kern/kern_kinfo.c as
+ * compiled by userland.
+ */
+dev_t
+dev2udev(cdev_t dev)
+{
+	if (dev == NULL)
+		return NOUDEV;
+	if ((dev->si_umajor & 0xffffff00) ||
+	    (dev->si_uminor & 0x0000ff00)) {
+		return NOUDEV;
+	}
+	return((dev->si_umajor << 8) | dev->si_uminor);
+}
+
+
+/*
  * Read proc's from memory file into buffer bp, which has space to hold
  * at most maxcnt procs.
  */
@@ -234,7 +251,7 @@ kvm_proclist(kvm_t *kd, int what, int ar
 
 		case KERN_PROC_TTY:
 			if ((proc.p_flag & P_CONTROLT) == 0 ||
-			    proc.p_pgrp->pg_session->s_ttyp->t_dev->si_udev
+			    dev2udev(proc.p_pgrp->pg_session->s_ttyp->t_dev)
 					!= (dev_t)arg)
 				continue;
 			break;