linux-kernel - Re: [PATCH] fix sparse problems with ARRAY

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Message-ID: <20070710194033.GB5751@martell.zuzino.mipt.ru>
Date:	Tue, 10 Jul 2007 23:40:33 +0400
From:	Alexey Dobriyan <adobriyan@...il.com>
To:	Adel Gadllah <adel.gadllah@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] fix sparse problems with ARRAY_SIZE

On Tue, Jul 10, 2007 at 06:09:48PM +0200, Adel Gadllah wrote:
> --- linux-2.6.orig/include/linux/kernel.h
> +++ linux-2.6/include/linux/kernel.h
> @@ -35,7 +35,11 @@ extern const char linux_proc_banner[];
>  #define ALIGN(x,a)		__ALIGN_MASK(x,(typeof(x))(a)-1)
>  #define __ALIGN_MASK(x,mask)	(((x)+(mask))&~(mask))
>  
> +#ifdef __CHECKER_
> +#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
> +#else
>  #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))
> +#endif

Al Viro recently gave a hint that he have patches for sparse to not give
spurious ARRAY_SIZE warnings.

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