Re: [PATCH] x86_64: tight online check in setup_per_cpu_areas

[Ingo Molnar]

* Yinghai Lu <yhlu.kernel@xxxxxxxxx> wrote:

> [PATCH] x86_64: tight online check in setup_per_cpu_areas
> 
> when numa disabled got compile warning:
> arch/x86/kernel/setup64.c: In function ???setup_per_cpu_areas???:
> arch/x86/kernel/setup64.c:147: warning: the address of ???contig_page_data??? will always evaluate as ???true???
> 
> it seems we missed checking if the node is online before we try to 
> refer NODE_DATA. so fix it

thanks, applied.

> +#ifndef CONFIG_NEED_MULTIPLE_NODES
> +		ptr = alloc_bootmem_pages(size);
> +#else
> +		int node = early_cpu_to_node(i);
>  
> +		if (!node_online(node) || !NODE_DATA(node))
>  			ptr = alloc_bootmem_pages(size);
> +		else
> +			ptr = alloc_bootmem_pages_node(NODE_DATA(node), size);
> +#endif

i'm wondering, shouldnt there just be a single facility for this mode of 
allocation, instead of this #ifdef and branch maze?

	Ingo
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