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

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Date:	Sat, 3 Jul 2010 21:47:58 -0400
From:	Chris Metcalf <cmetcalf@...era.com>
To:	Arnd Bergmann <arnd@...db.de>
CC:	Matthew Wilcox <matthew@....cx>, <linux-kernel@...r.kernel.org>,
	<linux-arch@...r.kernel.org>
Subject: Re: [PATCH] Break out types from <linux/list.h> to <linux/list_types.h>.

On 7/3/2010 5:00 AM, Arnd Bergmann wrote:
> On Friday 02 July 2010 22:48:17 Matthew Wilcox wrote:
>   
>> I wouldn't mind seeing kvm_types.h, rwlock_types.h and spinlock_types.h
>> merged into types.h, personally.  They're all pretty fundamental kernel
>> kind of types.  It's a matter of taste, and I'm not particularly fussed
>> one way or the other.
>>
>> mm_types.h is complex and full of mm-specific information, so keeping
>> it separate makes sense to me.
>>
>> I just object to the unnecessary creation of tiny files like this.
>> Which is how we ended up with atomic_t and atomic64_t in there in the
>> first place :-)
>>     
> Ah, I didn't notice you had moved the atomic types in there. I agree that
> the list types are in the same general category and it makes sense
> to treat them the same way.
>
> For rwlock_types.h and spinlock_types.h, I think including them in types.h
> would really cause too much other crap to be pulled in through lockdep
> and other things we might need in there in the future, which would in turn
> cause the same problems with types.h that Chris is trying to avoid
> in the first place by moving stuff out of list.h.
>   

Sounds like we have a consensus on moving the list_head, hlist_head, and
hlist_node types to <linux/types.h>.  I assume everyone is agreed that
initializers, etc., should stay in <linux/list.h>.  I will send out a
revised git patch on Sunday.

-- 
Chris Metcalf, Tilera Corp.
http://www.tilera.com

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