linux-kernel - Re: [PATCH -v2] Move list types from <linux/list.h> to <linux/types.h>.

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Message-ID: <20100704165638.GE5842@parisc-linux.org>
Date:	Sun, 4 Jul 2010 10:56:38 -0600
From:	Matthew Wilcox <matthew@....cx>
To:	Chris Metcalf <cmetcalf@...era.com>
Cc:	linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Christoph Hellwig <hch@...radead.org>,
	Alexey Dobriyan <adobriyan@...il.com>,
	Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH -v2] Move list types from <linux/list.h> to
	<linux/types.h>.

On Fri, Jul 02, 2010 at 01:41:14PM -0400, Chris Metcalf wrote:
> This allows a list_head (or hlist_head, etc.) to be used from places
> that used to be impractical, in particular <asm/processor.h>, which
> used to cause include file recursion: <linux/list.h> includes
> <linux/prefetch.h>, which always includes <asm/processor.h> for the
> prefetch macros, as well as <asm/system.h>, which often includes
> <asm/processor.h> directly or indirectly.
> 
> This avoids a lot of painful workaround hackery on the tile
> architecture, where we use a list_head in the thread_struct to chain
> together tasks that are activated on a particular hardwall.
> 
> Signed-off-by: Chris Metcalf <cmetcalf@...era.com>

Reviewed-by: Matthew Wilcox <willy@...ux.intel.com>

-- 
Matthew Wilcox				Intel Open Source Technology Centre
"Bill, look, we understand that you're interested in selling us this
operating system, but compare it to ours.  We can't possibly take such
a retrograde step."
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