linux-kernel - Re: [patch 1/6] mempolicy: convert MPOL constants to enum

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Message-ID: <Pine.LNX.4.64.0802271134150.1790@schroedinger.engr.sgi.com>
Date:	Wed, 27 Feb 2008 11:35:26 -0800 (PST)
From:	Christoph Lameter <clameter@....com>
To:	David Rientjes <rientjes@...gle.com>
cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Paul Jackson <pj@....com>,
	Lee Schermerhorn <Lee.Schermerhorn@...com>,
	Andi Kleen <ak@...e.de>, linux-kernel@...r.kernel.org
Subject: Re: [patch 1/6] mempolicy: convert MPOL constants to enum

On Mon, 25 Feb 2008, David Rientjes wrote:

>  struct mempolicy {
>  	atomic_t refcnt;
> -	short policy; 	/* See MPOL_* above */
> +	unsigned short policy; 	/* See MPOL_* above */

The point here is to have a 16 bit value? There are no space savins due to 
the alignment requirement of the union. Isnt it possible to use the enum 
here? If not then what is the point of the enum?

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