linux-kernel - Re: [PATCH 2/9] slab: makes clear_obj_pfmemalloc() just return store masked value

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Message-ID: <alpine.DEB.2.10.1402141824300.5204@nuc>
Date:	Fri, 14 Feb 2014 18:26:15 -0600 (CST)
From:	Christoph Lameter <cl@...ux.com>
To:	David Rientjes <rientjes@...gle.com>
cc:	Joonsoo Kim <iamjoonsoo.kim@....com>,
	Pekka Enberg <penberg@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Wanpeng Li <liwanp@...ux.vnet.ibm.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, Joonsoo Kim <js1304@...il.com>
Subject: Re: [PATCH 2/9] slab: makes clear_obj_pfmemalloc() just return store
 masked value

On Fri, 14 Feb 2014, David Rientjes wrote:

> Yeah, you don't need it, but don't you think it makes the code more
> readable?  Otherwise this is going to be just doing
>
> 	return (unsigned long)objp & ~SLAB_OBJ_PFMEMALLOC;
>
> and you gotta figure out the function type to understand it's returned as

Isnt there something like PTR_ALIGN() for this case that would make it
more readable?

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