linux-kernel - Re: [PATCH] mm/page_alloc: remove unused struct zone *z variable

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Date:	Sat, 9 Jan 2016 01:29:42 +0200
From:	"Kirill A. Shutemov" <kirill@...temov.name>
To:	Alexander Kuleshov <kuleshovmail@...il.com>,
	Robin Holt <holt@....com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Mel Gorman <mgorman@...hsingularity.net>,
	Michal Hocko <mhocko@...e.com>,
	Vlastimil Babka <vbabka@...e.cz>,
	David Rientjes <rientjes@...gle.com>,
	Joonsoo Kim <js1304@...il.com>,
	Yaowei Bai <bywxiaobai@....com>,
	Xishi Qiu <qiuxishi@...wei.com>,
	Alexander Duyck <alexander.h.duyck@...hat.com>,
	"Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>,
	Johannes Weiner <hannes@...xchg.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm/page_alloc: remove unused struct zone *z variable

On Fri, Jan 08, 2016 at 01:59:08PM +0600, Alexander Kuleshov wrote:
> This patch removes unused struct zone *z variable which is
> appeared in 86051ca5eaf5 (mm: fix usemap initialization)

I guess it's a fix for 1e8ce83cd17f (mm: meminit: move page initialization
into a separate function).
> 
> Signed-off-by: Alexander Kuleshov <kuleshovmail@...il.com>

Acked-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>

> ---
>  mm/page_alloc.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/mm/page_alloc.c b/mm/page_alloc.c
> index 9d666df..9bde098 100644
> --- a/mm/page_alloc.c
> +++ b/mm/page_alloc.c
> @@ -4471,13 +4471,11 @@ void __meminit memmap_init_zone(unsigned long size, int nid, unsigned long zone,
>  	pg_data_t *pgdat = NODE_DATA(nid);
>  	unsigned long end_pfn = start_pfn + size;
>  	unsigned long pfn;
> -	struct zone *z;
>  	unsigned long nr_initialised = 0;
>  
>  	if (highest_memmap_pfn < end_pfn - 1)
>  		highest_memmap_pfn = end_pfn - 1;
>  
> -	z = &pgdat->node_zones[zone];
>  	for (pfn = start_pfn; pfn < end_pfn; pfn++) {
>  		/*
>  		 * There can be holes in boot-time mem_map[]s
> -- 
> 2.6.2.485.g1bc8fea
> 
> --
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-- 
 Kirill A. Shutemov