linux-kernel - Re: [RFC PATCH v2, part4 31/39] mm/SH: prepare for removing num_physpages and simplify mem

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Date:	Sun, 24 Mar 2013 16:06:17 +0400
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
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>,
	Jianguo Wu <wujianguo@...wei.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, Paul Mundt <lethal@...ux-sh.org>,
	Tang Chen <tangchen@...fujitsu.com>, linux-sh@...r.kernel.org
Subject: Re: [RFC PATCH v2, part4 31/39] mm/SH: prepare for removing num_physpages
 and simplify mem_init()

Hello.

On 24-03-2013 11:25, Jiang Liu wrote:

> Prepare for removing num_physpages and simplify mem_init().

> Signed-off-by: Jiang Liu <jiang.liu@...wei.com>
> Cc: Paul Mundt <lethal@...ux-sh.org>
> Cc: Wen Congyang <wency@...fujitsu.com>
> Cc: Tang Chen <tangchen@...fujitsu.com>
> Cc: linux-sh@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org
> ---
>   arch/sh/mm/init.c |   25 ++++---------------------
>   1 file changed, 4 insertions(+), 21 deletions(-)

> diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c
> index aecd913..3826596 100644
> --- a/arch/sh/mm/init.c
> +++ b/arch/sh/mm/init.c
> @@ -407,24 +407,18 @@ unsigned int mem_init_done = 0;
>
>   void __init mem_init(void)
>   {
> -	int codesize, datasize, initsize;
> -	int nid;
> +	pg_data_t *pgdat;
>
>   	iommu_init();
>
> -	num_physpages = 0;
>   	high_memory = NULL;
>
> -	for_each_online_node(nid) {
> -		pg_data_t *pgdat = NODE_DATA(nid);
> +	for_each_online_pgdat(pgdat) {
>   		void *node_high_memory;
>
> -		num_physpages += pgdat->node_present_pages;
> -
>   		if (pgdat->node_spanned_pages)
>   			free_all_bootmem_node(pgdat);
>
> -
>   		node_high_memory = (void *)__va((pgdat->node_start_pfn +
>   						 pgdat->node_spanned_pages) <<
>   						 PAGE_SHIFT);
> @@ -441,19 +435,8 @@ void __init mem_init(void)
>
>   	vsyscall_init();
>
> -	codesize =  (unsigned long) &_etext - (unsigned long) &_text;
> -	datasize =  (unsigned long) &_edata - (unsigned long) &_etext;
> -	initsize =  (unsigned long) &__init_end - (unsigned long) &__init_begin;
> -
> -	printk(KERN_INFO "Memory: %luk/%luk available (%dk kernel code, "
> -	       "%dk data, %dk init)\n",
> -		nr_free_pages() << (PAGE_SHIFT-10),
> -		num_physpages << (PAGE_SHIFT-10),
> -		codesize >> 10,
> -		datasize >> 10,
> -		initsize >> 10);
> -
> -	printk(KERN_INFO "virtual kernel memory layout:\n"
> +	mem_init_print_info(NULL);
> +	pr_info("virtual kernel memory layout:\n"
>   		"    fixmap  : 0x%08lx - 0x%08lx   (%4ld kB)\n"
>   #ifdef CONFIG_HIGHMEM
>   		"    pkmap   : 0x%08lx - 0x%08lx   (%4ld kB)\n"
>

    Hm, isn't patch 31 the same as patch 30?

WBR, Sergei

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