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To: linux-kernel@vger.kernel.org
From: "H. Peter Anvin" <hpa@zytor.com>
Subject: Re: major/minor split
Date: 20 Mar 2003 15:52:18 -0800
Organization: Transmeta Corporation, Santa Clara CA
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References: <UTC200303202224.h2KMOXC01107.aeb@smtp.cwi.nl>
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Followup to:  <UTC200303202224.h2KMOXC01107.aeb@smtp.cwi.nl>
By author:    Andries.Brouwer@cwi.nl
In newsgroup: linux.dev.kernel
> 
> For kdev_t (8,1) is 0x00080001 and (8,256) is 0x00080100.
> So kdev_t allows simple fast composition and decomposition,
> but is restricted to the kernel.
> While dev_t requires a conditional, since it has to remain
> compatible with the old 8+8 userspace.
> 

I would suggest, instead:

typedef struct kdev {
       u32 major, minor;
} kdev_t;

	-hpa
-- 
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