linux-kernel - Re: [patch] x86, mm: Clean up initmem

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Date:	Fri, 04 Mar 2011 00:43:47 +0300
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	David Rientjes <rientjes@...gle.com>
CC:	Tejun Heo <tj@...nel.org>, Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, tglx@...utronix.de,
	yinghai@...nel.org, brgerst@...il.com, shaohui.zheng@...el.com,
	linux-kernel@...r.kernel.org
Subject: Re: [patch] x86, mm: Clean up initmem_init

On 03/04/2011 12:15 AM, David Rientjes wrote:
> This patch cleans initmem_init() so that it is more readable and doesn't
> use an unnecessary array of function pointers to convolute the flow of
> the code.  It also makes it obvious that dummy_numa_init() will always
> succeed (and documents that requirement) so that the existing BUG() is
> never actually reached.
> 
> No functional change.
> 
> Signed-off-by: David Rientjes <rientjes@...gle.com>
> ---
>  arch/x86/mm/numa_64.c |   92 ++++++++++++++++++++++++++++---------------------
>  1 files changed, 53 insertions(+), 39 deletions(-)
> 
...
> +void __init initmem_init(void)
> +{
> +	int ret;
>  
> -			if (nid == NUMA_NO_NODE)
> -				continue;
> -			if (!node_online(nid))
> -				numa_clear_node(j);
> -		}
> -		numa_init_array();
> -		return;
> +	if (!numa_off) {
> +#ifdef CONFIG_ACPI_NUMA
> +		ret = numa_init(x86_acpi_numa_init);
> +		if (!ret)
> +			return;
> +#endif
> +#ifdef CONFIG_AMD_NUMA
> +		ret = numa_init(amd_numa_init);
> +		if (!ret)
> +			return;
> +#endif
>  	}
> -	BUG();
> +
> +	numa_init(dummy_numa_init);
>  }
>  
>  unsigned long __init numa_free_all_bootmem(void)

Divid, I suspect it's due to diff format and we still need "ret" here, right?

-- 
    Cyrill
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