linux-kernel - Re: [PATCH v3, part4 26/39] mm/openrisc: prepare for removing num_physpages and simplify mem

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Date:	Tue, 02 Apr 2013 07:31:44 +0200
From:	Jonas Bonn <jonas@...thpole.se>
To:	Jiang Liu <liuj97@...il.com>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	David Rientjes <rientjes@...gle.com>,
	Jiang Liu <jiang.liu@...wei.com>,
	Wen Congyang <wency@...fujitsu.com>,
	Mel Gorman <mgorman@...e.de>, Minchan Kim <minchan@...nel.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Michal Hocko <mhocko@...e.cz>,
	James Bottomley <James.Bottomley@...senPartnership.com>,
	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
	David Howells <dhowells@...hat.com>,
	Mark Salter <msalter@...hat.com>,
	Jianguo Wu <wujianguo@...wei.com>, linux-mm@...ck.org,
	linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org,
	Arnd Bergmann <arnd@...db.de>, linux@...ts.openrisc.net
Subject: Re: [PATCH v3, part4 26/39] mm/openrisc: prepare for removing num_physpages
 and simplify mem_init()

On 03/26/2013 04:54 PM, Jiang Liu wrote:
> Prepare for removing num_physpages and simplify mem_init().
>
> Signed-off-by: Jiang Liu <jiang.liu@...wei.com>
> Cc: Jonas Bonn <jonas@...thpole.se>
> Cc: David Howells <dhowells@...hat.com>
> Cc: Arnd Bergmann <arnd@...db.de>
> Cc: linux@...ts.openrisc.net
> Cc: linux-kernel@...r.kernel.org

Tested and works fine on OpenRISC.

Acked-by: Jonas Bonn <jonas@...thpole.se>

/Jonas

> ---
> Hi all,
> 	Sorry for my mistake that my previous patch series has been screwed up.
> So I regenerate a third version and also set up a git tree at:
> 	git://github.com/jiangliu/linux.git mem_init
> 	Any help to review and test are welcomed!
>
> 	Regards!
> 	Gerry
> ---
>   arch/openrisc/mm/init.c |   44 ++++----------------------------------------
>   1 file changed, 4 insertions(+), 40 deletions(-)
>
> diff --git a/arch/openrisc/mm/init.c b/arch/openrisc/mm/init.c
> index 71d6b40..f3c8f47 100644
> --- a/arch/openrisc/mm/init.c
> +++ b/arch/openrisc/mm/init.c
> @@ -191,56 +191,20 @@ void __init paging_init(void)
>   
>   /* References to section boundaries */
>   
> -static int __init free_pages_init(void)
> -{
> -	int reservedpages, pfn;
> -
> -	/* this will put all low memory onto the freelists */
> -	free_all_bootmem();
> -
> -	reservedpages = 0;
> -	for (pfn = 0; pfn < max_low_pfn; pfn++) {
> -		/*
> -		 * Only count reserved RAM pages
> -		 */
> -		if (PageReserved(mem_map + pfn))
> -			reservedpages++;
> -	}
> -
> -	return reservedpages;
> -}
> -
> -static void __init set_max_mapnr_init(void)
> -{
> -	max_mapnr = num_physpages = max_low_pfn;
> -}
> -
>   void __init mem_init(void)
>   {
> -	int codesize, reservedpages, datasize, initsize;
> -
>   	BUG_ON(!mem_map);
>   
> -	set_max_mapnr_init();
> -
> +	max_mapnr = max_low_pfn;
>   	high_memory = (void *)__va(max_low_pfn * PAGE_SIZE);
>   
>   	/* clear the zero-page */
>   	memset((void *)empty_zero_page, 0, PAGE_SIZE);
>   
> -	reservedpages = free_pages_init();
> -
> -	codesize = (unsigned long)&_etext - (unsigned long)&_stext;
> -	datasize = (unsigned long)&_edata - (unsigned long)&_etext;
> -	initsize = (unsigned long)&__init_end - (unsigned long)&__init_begin;
> +	/* this will put all low memory onto the freelists */
> +	free_all_bootmem();
>   
> -	printk(KERN_INFO
> -	       "Memory: %luk/%luk available (%dk kernel code, %dk reserved, %dk data, %dk init, %ldk highmem)\n",
> -	       (unsigned long)nr_free_pages() << (PAGE_SHIFT - 10),
> -	       max_mapnr << (PAGE_SHIFT - 10), codesize >> 10,
> -	       reservedpages << (PAGE_SHIFT - 10), datasize >> 10,
> -	       initsize >> 10, (unsigned long)(0 << (PAGE_SHIFT - 10))
> -	    );
> +	mem_init_print_info(NULL);
>   
>   	printk("mem_init_done ...........................................\n");
>   	mem_init_done = 1;


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