linux-kernel - Re: [PATCH 1/2] vmalloc: use ZERO_SIZE_PTR / ZERO_OR_NULL

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Message-ID: <20120228094415.GA2868@mwanda>
Date:	Tue, 28 Feb 2012 12:44:15 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Dmitry Antipov <dmitry.antipov@...aro.org>
Cc:	Rusty Russell <rusty.russell@...aro.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	linaro-dev@...ts.linaro.org, patches@...aro.org
Subject: Re: [PATCH 1/2] vmalloc: use ZERO_SIZE_PTR / ZERO_OR_NULL_PTR

On Tue, Feb 28, 2012 at 01:33:59PM +0400, Dmitry Antipov wrote:
>  - Fix vmap() to return ZERO_SIZE_PTR if 0 pages are requested;
>  - fix __vmalloc_node_range() to return ZERO_SIZE_PTR if 0 bytes
>    are requested;
>  - fix __vunmap() to check passed pointer with ZERO_OR_NULL_PTR.
> 

Why?

Also patch 2/2 should go in before patch 1/2 or it breaks things.

regards,
dan carpenter


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