From: Christoph Hellwig <hch@caldera.de>
To: linux-lvm@sistina.com
Cc: Alexander Viro <viro@math.psu.edu>,
Linus Torvalds <torvalds@transmeta.com>,
linux-kernel@vger.kernel.org
Subject: Re: [linux-lvm] Re: [RFLART] kdev_t in ioctls
Date: Mon Jan 14 12:14:02 2002 [thread overview]
Message-ID: <20020114191342.A3731@caldera.de> (raw)
In-Reply-To: <20020114190834.A3473@caldera.de>; from hch@caldera.de on Mon, Jan 14, 2002 at 07:08:34PM +0100
On Mon, Jan 14, 2002 at 07:08:34PM +0100, Christoph Hellwig wrote:
> > The good news is that the bit-for-bit representation of old kdev_t and
> > "dev_t" are obviously 100% the same, so we should just make the damn thing
> > be dev_t, and user land will never notice anything.
>
> Glibc disagrees with you (bits/types.h):
>
> typedef __u_quad_t __dev_t; /* Type of device numbers. */
>
> We'd have to use __kernel_dev_t instead which again pulls kernel
> headers in..
Argg. That's also non-funny:
[hch@sb linux]$ grep __kernel_dev_t; include/asm-*/posix_types.h
include/asm-alpha/posix_types.h:typedef unsigned int __kernel_dev_t;
include/asm-arm/posix_types.h:typedef unsigned short __kernel_dev_t;
include/asm-cris/posix_types.h:typedef unsigned short __kernel_dev_t;
include/asm-i386/posix_types.h:typedef unsigned short __kernel_dev_t;
include/asm-ia64/posix_types.h:typedef unsigned int __kernel_dev_t;
include/asm-m68k/posix_types.h:typedef unsigned short __kernel_dev_t;
include/asm-mips64/posix_types.h:typedef unsigned int __kernel_dev_t;
include/asm-mips/posix_types.h:typedef unsigned int __kernel_dev_t;
include/asm-parisc/posix_types.h:typedef unsigned int __kernel_dev_t;
include/asm-ppc/posix_types.h:typedef unsigned int __kernel_dev_t;
include/asm-s390/posix_types.h:typedef unsigned short __kernel_dev_t;
include/asm-s390x/posix_types.h:typedef unsigned int __kernel_dev_t;
include/asm-sh/posix_types.h:typedef unsigned short __kernel_dev_t;
include/asm-sparc64/posix_types.h:typedef unsigned int __kernel_dev_t;
include/asm-sparc/posix_types.h:typedef unsigned short __kernel_dev_t;
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@caldera.de>
To: linux-lvm@sistina.com
Cc: Alexander Viro <viro@math.psu.edu>,
Linus Torvalds <torvalds@transmeta.com>,
linux-kernel@vger.kernel.org
Subject: Re: [linux-lvm] Re: [RFLART] kdev_t in ioctls
Date: Mon, 14 Jan 2002 19:13:42 +0100 [thread overview]
Message-ID: <20020114191342.A3731@caldera.de> (raw)
In-Reply-To: <Pine.LNX.4.33.0201140957040.15128-100000@penguin.transmeta.com> <20020114190834.A3473@caldera.de>
In-Reply-To: <20020114190834.A3473@caldera.de>; from hch@caldera.de on Mon, Jan 14, 2002 at 07:08:34PM +0100
On Mon, Jan 14, 2002 at 07:08:34PM +0100, Christoph Hellwig wrote:
> > The good news is that the bit-for-bit representation of old kdev_t and
> > "dev_t" are obviously 100% the same, so we should just make the damn thing
> > be dev_t, and user land will never notice anything.
>
> Glibc disagrees with you (bits/types.h):
>
> typedef __u_quad_t __dev_t; /* Type of device numbers. */
>
> We'd have to use __kernel_dev_t instead which again pulls kernel
> headers in..
Argg. That's also non-funny:
[hch@sb linux]$ grep __kernel_dev_t; include/asm-*/posix_types.h
include/asm-alpha/posix_types.h:typedef unsigned int __kernel_dev_t;
include/asm-arm/posix_types.h:typedef unsigned short __kernel_dev_t;
include/asm-cris/posix_types.h:typedef unsigned short __kernel_dev_t;
include/asm-i386/posix_types.h:typedef unsigned short __kernel_dev_t;
include/asm-ia64/posix_types.h:typedef unsigned int __kernel_dev_t;
include/asm-m68k/posix_types.h:typedef unsigned short __kernel_dev_t;
include/asm-mips64/posix_types.h:typedef unsigned int __kernel_dev_t;
include/asm-mips/posix_types.h:typedef unsigned int __kernel_dev_t;
include/asm-parisc/posix_types.h:typedef unsigned int __kernel_dev_t;
include/asm-ppc/posix_types.h:typedef unsigned int __kernel_dev_t;
include/asm-s390/posix_types.h:typedef unsigned short __kernel_dev_t;
include/asm-s390x/posix_types.h:typedef unsigned int __kernel_dev_t;
include/asm-sh/posix_types.h:typedef unsigned short __kernel_dev_t;
include/asm-sparc64/posix_types.h:typedef unsigned int __kernel_dev_t;
include/asm-sparc/posix_types.h:typedef unsigned short __kernel_dev_t;
next prev parent reply other threads:[~2002-01-14 12:14 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-01-14 17:56 [RFLART] kdev_t in ioctls Alexander Viro
2002-01-14 12:04 ` [linux-lvm] " Linus Torvalds
2002-01-14 18:01 ` Linus Torvalds
2002-01-13 17:17 ` [linux-lvm] " Joe Thornber
2002-01-15 6:27 ` Joe Thornber
2002-01-14 12:09 ` Christoph Hellwig
2002-01-14 18:08 ` Christoph Hellwig
2002-01-14 12:14 ` Christoph Hellwig [this message]
2002-01-14 18:13 ` Christoph Hellwig
2002-01-14 12:45 ` Alan Cox
2002-01-14 18:56 ` Alan Cox
2002-01-14 12:47 ` Christoph Hellwig
2002-01-14 18:45 ` Christoph Hellwig
2002-01-14 12:53 ` Linus Torvalds
2002-01-14 18:50 ` Linus Torvalds
2002-01-14 12:21 ` Alexander Viro
2002-01-14 18:20 ` Alexander Viro
-- strict thread matches above, loose matches on Subject: below --
2002-01-15 14:46 [linux-lvm] " Andries.Brouwer
2002-01-15 20:44 ` Andries.Brouwer
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