The following reply was made to PR kern/29600; it has been noted by GNATS.

From: FUKAUMI Naoki <fun@naobsd.org>
To: YAMAMOTO Takashi <yamt@mwd.biglobe.ne.jp>
Cc: gnats-bugs@netbsd.org
Subject: Re: kern/29600: cbb(4) hangs on boot
Date: Sat, 12 Mar 2005 17:24:17 +0900

 At Sat, 12 Mar 2005 17:06:48 +0900,
 YAMAMOTO Takashi wrote:
 > > We don't have any reason to wait value is changed in while() loop.
 > > 
 > > tsleep() will be awakened if power cycle event occured. There is no
 > > reason to check sc_pwrcycle value.
 > 
 > i think
 > 	while (condition) {
 > 		sleep();
 > 	}
 > is a common convention to prevent spurious wakeups.
 
 hmm....
 
 Is it possible to awake tsleep($sc->sc_pwrcycle) by another place?
 (i.e. except wakeup(&sc->sc_pwrcycle))
 
 --
 FUKAUMI Naoki