linux-kernel - Re: [PATCH] x86_64: cleanup setup_node_zones called by paging

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Date:	Wed, 9 Jan 2008 11:19:01 -0800 (PST)
From:	Christoph Lameter <clameter@....com>
To:	Yinghai Lu <Yinghai.Lu@....COM>
cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86_64: cleanup setup_node_zones called by paging_init
 v2

On Wed, 9 Jan 2008, Yinghai Lu wrote:

> +#ifdef CONFIG_FLAT_NODE_MEM_MAP
>  /* Initialize final allocator for a zone */
> -void __init setup_node_zones(int nodeid)
> +static void __init setup_node_zones(int nodeid)
>  { 
>  	unsigned long start_pfn, end_pfn, memmapsize, limit;
>  
> @@ -244,14 +245,14 @@ void __init setup_node_zones(int nodeid)
>  	   memory. */
>  	memmapsize = sizeof(struct page) * (end_pfn-start_pfn);
>  	limit = end_pfn << PAGE_SHIFT;
> -#ifdef CONFIG_FLAT_NODE_MEM_MAP
> +
>  	NODE_DATA(nodeid)->node_mem_map = 
>  		__alloc_bootmem_core(NODE_DATA(nodeid)->bdata, 
>  				memmapsize, SMP_CACHE_BYTES, 
>  				round_down(limit - memmapsize, PAGE_SIZE), 
>  				limit);
> -#endif
>  } 

Here you could do an 

#else

<empty def of setup_node_zones>

which would avoid the additional #ifdef later.

Also move the for_each statement into that function. 

The current version will have an unused variable i if 
CONFIG_FLAG_NODE_MEM_MAP is not set.
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