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Date: Wed, 20 Nov 2002 19:39:35 -0500 (EST)
From: Alexander Viro <viro@math.psu.edu>
To: Andries.Brouwer@cwi.nl
cc: linux-kernel@vger.kernel.org, torvalds@transmeta.com
Subject: Re: kill i_dev
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On Thu, 21 Nov 2002 Andries.Brouwer@cwi.nl wrote:

> One disadvantage of enlarging the size of dev_t is
> that struct inode grows. Bad.
> We used to have i_dev and i_rdev; today i_rdev has split into
> i_rdev, i_bdev and i_cdev. Bad.
> 
> It looks like these four fields can be replaced by a single one,
> making struct inode smaller. Not bad.

No, they can't.  We _can_ put i_bdev/i_cdev into union and we can
kill i_dev.  However, rdev and [cb]dev will have to remain separate.

BTW, watch out for socket.c use of ->i_dev.

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