Re: [dm-devel] Re: [RFC] device-mapper ioctl interface

From: Daniel Phillips (
Date: Mon Jun 09 2003 - 17:08:54 EST

On Friday 06 June 2003 19:17, Greg KH wrote:
> On Thu, Jun 05, 2003 at 10:39:43AM +0100, Joe Thornber wrote:
> > Here's the header file for the the proposed new ioctl interface for
> > dm. We've tried to change as little as possible to minimise code
> > changes in LVM2 and EVMS.
> Minor comment:
> - please do not use uint_32t types in kernel header files. Use
> the proper __u32 type which is guarenteed to be the proper
> size across the user/kernel boundry.

I'm not sure what we were both smoking, but obviously all flavors of u32
should be the same size regardless of where they are located. As I
understand it, the only interesting difference between __u32 and u32 is that
the former is standard C while the latter is Linux's (sensible) local



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