linux-kernel - Re: [PATCH]: bunzip2: Fix warning in get_next

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Message-ID: <20100522140741.GM31073@ZenIV.linux.org.uk>
Date:	Sat, 22 May 2010 15:07:41 +0100
From:	Al Viro <viro@...IV.linux.org.uk>
To:	Prarit Bhargava <prarit@...hat.com>
Cc:	linux-kernel@...r.kernel.org, stable@...nel.org,
	phillip@...gher.demon.co.uk, alain@...ff.lu, hpa@...or.com
Subject: Re: [PATCH]: bunzip2: Fix warning in get_next_block()

On Sat, May 22, 2010 at 10:04:07AM -0400, Prarit Bhargava wrote:
> Fix checkstack compile warning in get_next_block():
> 
> lib/decompress_bunzip2.c: In function `get_next_block':
> lib/decompress_bunzip2.c:511: warning: the frame size of 1920 bytes is larger than 1024 bytes
 
>  	int dbufCount, nextSym, dbufSize, groupCount, selector,
> -		i, j, k, t, runPos, symCount, symTotal, nSelectors,
> -		byteCount[256];
> -	unsigned char uc, symToByte[256], mtfSymbol[256], *selectors;
> +		i, j, k, t, runPos, symCount, symTotal, nSelectors;
> +	static int byteCount[256];
> +	unsigned char uc, *selectors;
> +	static unsigned char symToByte[256], mtfSymbol[256];
>  	unsigned int *dbuf, origPtr;

Um...  Some details might be useful, starting with "why can't that function
be called from several processes at once"...
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