Date: Tue, 19 Feb 2002 01:13:55 -0800 (PST) From: Julian Elischer <julian@elischer.org> To: Terry Lambert <tlambert2@mindspring.com> Cc: Matthew Dillon <dillon@apollo.backplane.com>, Peter Wemm <peter@wemm.org>, current@FreeBSD.ORG Subject: Re: Patch sets to date and timing tests with Giant out of userret. Message-ID: <Pine.BSF.4.21.0202190113500.56008-100000@InterJet.elischer.org> In-Reply-To: <3C720859.C77590F0@mindspring.com>
next in thread | previous in thread | raw e-mail | index | archive | help
exactly On Tue, 19 Feb 2002, Terry Lambert wrote: > Julian Elischer wrote: > > The fully safe version of this code is: > > td->td_retval[0] = td->td_ucred->cr_ruid; > > td->td_retval[1] = td->td_ucred->cr_uid; > > return (0); > > > > because td->td_ucred is read-only for it's whole existance. > > ??? > > Are you sure that td->td_ucred can't change in the middle, > to point to a different ucred, as a result of kernel > preemption? > > -- Terry > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?Pine.BSF.4.21.0202190113500.56008-100000>