Date: Mon, 26 Mar 2001 23:01:45 +0200 From: Poul-Henning Kamp <phk@critter.freebsd.dk> To: Mike Smith <msmith@FreeBSD.org> 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: <68229.985640505@critter> In-Reply-To: Your message of "Mon, 26 Mar 2001 13:00:32 -0800." <200103262100.f2QL0WE01189@mass.dis.org>
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In message <200103262100.f2QL0WE01189@mass.dis.org>, Mike Smith writes: >> >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. Right, I agree. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message
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