From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christoph Hellwig <hch@infradead.org>
Subject: Re: [PATCH] Break out types from <linux/list.h> to
 <linux/list_types.h>.
Date: Fri, 2 Jul 2010 17:10:10 -0400
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To: Arnd Bergmann <arnd@arndb.de>
Cc: Matthew Wilcox <matthew@wil.cx>, Chris Metcalf <cmetcalf@tilera.com>, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org

On Fri, Jul 02, 2010 at 10:43:13PM +0200, Arnd Bergmann wrote:
> On Friday 02 July 2010 21:19:11 Matthew Wilcox wrote:
> > Why a new header file instead of linux/types.h?
> 
> I think it mostly makes sense because a list_head by itself usually
> isn't all that useful, you also want the list_add/list_for_each/...
> macros, so you end up including linux/list.h anyway.

It's useful for headers.  You can assume linux/types.h is already
included and don't have to bother to include list{_types}.h everywhere.