linux-ext4 - Re: [PATCH 1/2] ext4: Conditionally define compat ioctl numbers

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Message-ID: <20100525152219.GM5556@thunk.org>
Date:	Tue, 25 May 2010 11:22:19 -0400
From:	tytso@....edu
To:	Ben Hutchings <ben@...adent.org.uk>
Cc:	Andreas Dilger <adilger@....com>, linux-ext4@...r.kernel.org
Subject: Re: [PATCH 1/2] ext4: Conditionally define compat ioctl numbers

On Tue, May 25, 2010 at 11:15:48AM -0400, tytso@....EDU wrote:
> On Fri, May 21, 2010 at 12:30:22AM +0100, Ben Hutchings wrote:
> > It is unnecessary, and in general impossible, to define the compat
> > ioctl numbers except when building the filesystem with CONFIG_COMPAT
> > defined.
> 
> Umm.... why?  (The impossible part)  I think I'm missing something here.
> 

Oh, right.  The type widths might not be guaranteed (or even defined).
Never mind...

    	    	     	    	      	 	    	- Ted
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