linux-kernel - Re: [PATCH] mm/ksm.c - Fix compile warnings (PS ignore my formatting in previous email)

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Date:	Wed, 04 Nov 2009 10:57:54 +0100
From:	walter harms <wharms@....de>
To:	askb <askb23@...il.com>
Cc:	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Re: [PATCH] mm/ksm.c - Fix compile warnings (PS ignore my formatting
 in previous email)



askb schrieb:
> Found the compiler warning on linux-next: 	
> 
> mm/ksm.c: In function ‘ksm_scan_thread’:
> mm/ksm.c:1083: warning: ‘page2[0u]’ may be used uninitialized in this
> function
> mm/ksm.c:1083: note: ‘page2[0u]’ was declared here
> 
> fix for the above warning:
> 
> Signed-off-by: Anil SB <askb23@...il.com>
> 
> diff --git a/mm/ksm.c b/mm/ksm.c
> index bef1af4..2ea0fd3 100644
> --- a/mm/ksm.c
> +++ b/mm/ksm.c
> @@ -1080,7 +1080,7 @@ static void stable_tree_append(struct rmap_item *rmap_item,
>   */
>  static void cmp_and_merge_page(struct page *page, struct rmap_item *rmap_item)
>  {
> -	struct page *page2[1];
> +	struct page *page2[1] = {NULL};
>  	struct rmap_item *tree_rmap_item;
>  	unsigned int checksum;
>  	int err;
> 
> 

a 1 element array looks strange, did you look what kind of magic is here used ?

re,
 wh

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