Date: Mon, 26 Mar 2001 13:00:32 -0800 From: Mike Smith <msmith@freebsd.org> To: Poul-Henning Kamp <phk@critter.freebsd.dk> Cc: John Baldwin <jhb@FreeBSD.org>, Greg Lehey <grog@lemis.com>, leclercn@videotron.ca, freebsd-alpha@FreeBSD.org Subject: Re: dev_t size mismatch kernel / userland Message-ID: <200103262100.f2QL0WE01189@mass.dis.org> In-Reply-To: Your message of "Mon, 26 Mar 2001 21:31:31 %2B0200." <66685.985635091@critter>
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> >This will probably make Poul's head spin, but one idea might be to have a
> >kdev_t type. :-P In the kernel kdev_t == dev_t, and in userland, kdev_t is a
> >void *. This would work in this case I think because you never use the dev_t's
> >while in userland. I do like exporting trimmed down structures, however.
> >Please don't export mutexes while you are at it. :-P
>
> Guys,
>
> I'm new to this subject, so please fill me in: just what in the
> (kernel) dev_t do you want to export to userland ?
Nothing. Greg just leaks a dev_t in a structure exchanged between
userland and the kernel, and this bit because dev_t is a different size
between the two on the Alpha; the right fix is simply to not abuse this
structure like this.
--
... every activity meets with opposition, everyone who acts has his
rivals and unfortunately opponents also. But not because people want
to be opponents, rather because the tasks and relationships force
people to take different points of view. [Dr. Fritz Todt]
V I C T O R Y N O T V E N G E A N C E
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