From: Christoph Hellwig <hch@infradead.org>
To: Linus Torvalds <torvalds@transmeta.com>
Cc: Roman Zippel <zippel@linux-m68k.org>,
"David S. Miller" <davem@redhat.com>,
Andries.Brouwer@cwi.nl, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] new system call mknod64
Date: Mon, 21 Apr 2003 19:47:49 +0100 [thread overview]
Message-ID: <20030421194749.A10963@infradead.org> (raw)
In-Reply-To: <Pine.LNX.4.44.0304211141590.9109-100000@home.transmeta.com>; from torvalds@transmeta.com on Mon, Apr 21, 2003 at 11:44:59AM -0700
On Mon, Apr 21, 2003 at 11:44:59AM -0700, Linus Torvalds wrote:
> We HAVE to do the mapping somewhere. Old applications only use the lower
> 16 bits, and that's just something that MUST NOT be broken.
>
> The question is only _where_ (not whether) we do the mapping. Right now we
> keep "dev_t" in teh same format as we give back to user space, and thus we
> always map into that format internally. But we don't have to: we can have
> an internal format that is different from the one we show users.
Why do we need to do a mapping? Old applications just won't see the
high bits (they're mapped to whatever overflow value) - values that
fit into the old 16bit range should never be remapped.
next prev parent reply other threads:[~2003-04-21 18:36 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-04-20 21:26 [PATCH] new system call mknod64 Andries.Brouwer
2003-04-20 21:43 ` David S. Miller
2003-04-20 21:56 ` Linus Torvalds
2003-04-21 11:59 ` Roman Zippel
2003-04-21 18:01 ` Linus Torvalds
2003-04-21 18:10 ` Christoph Hellwig
2003-04-21 18:21 ` viro
2003-04-21 18:22 ` Linus Torvalds
2003-04-21 18:27 ` viro
2003-04-21 18:35 ` Linus Torvalds
2003-04-21 18:54 ` viro
2003-04-21 19:16 ` Jörn Engel
2003-04-21 18:35 ` Christoph Hellwig
2003-04-21 18:42 ` H. Peter Anvin
2003-04-21 18:44 ` Linus Torvalds
2003-04-21 18:47 ` Christoph Hellwig [this message]
2003-04-21 18:58 ` viro
2003-04-21 19:05 ` Linus Torvalds
2003-04-21 19:35 ` viro
2003-04-21 20:02 ` Linus Torvalds
2003-04-21 19:04 ` Linus Torvalds
2003-04-21 19:59 ` H. Peter Anvin
2003-04-21 18:51 ` H. Peter Anvin
2003-04-21 23:49 ` Roman Zippel
[not found] <20030421215009$2052@gated-at.bofh.it>
[not found] ` <20030421231010$7ee3@gated-at.bofh.it>
[not found] ` <20030422000016$17e3@gated-at.bofh.it>
[not found] ` <20030422083014$0fe2@gated-at.bofh.it>
2003-04-22 20:02 ` Arnd Bergmann
-- strict thread matches above, loose matches on Subject: below --
2003-04-22 1:02 Andries.Brouwer
2003-04-22 1:32 ` H. Peter Anvin
2003-04-22 2:01 ` Jamie Lokier
2003-04-22 2:52 ` H. Peter Anvin
2003-04-22 6:00 ` jw schultz
2003-04-22 17:17 ` H. Peter Anvin
2003-04-21 21:48 Andries.Brouwer
2003-04-21 22:07 ` Linus Torvalds
2003-04-21 21:43 Andries.Brouwer
2003-04-21 23:02 ` H. Peter Anvin
2003-04-21 23:50 ` Jamie Lokier
2003-04-22 8:24 ` Shachar Shemesh
2003-04-20 22:12 Andries.Brouwer
2003-04-21 6:31 ` H. Peter Anvin
2003-04-20 20:34 Andries.Brouwer
2003-04-20 21:12 ` David S. Miller
2003-04-20 18:39 Andries.Brouwer
2003-04-20 18:52 ` Christoph Hellwig
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