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Date: Tue, 23 Mar 2010 11:42:41 +0100
From: Ingo Molnar <mingo@elte.hu>
To: Yinghai Lu <yinghai@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>, "H. Peter Anvin" <hpa@zytor.com>,
       Andrew Morton <akpm@linux-foundation.org>,
       David Miller <davem@davemloft.net>,
       Benjamin Herrenschmidt <benh@kernel.crashing.org>,
       Linus Torvalds <torvalds@linux-foundation.org>,
       linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org
Subject: Re: [RFC PATCH -v3 1/2] lmb: seperate region array from lmb_region
 struct
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* Yinghai Lu <yinghai@kernel.org> wrote:

>  void __init lmb_init(void)
>  {
> +	lmb.memory.region   = lmb_memory_region;
> +	lmb.memory.region_array_size   = ARRAY_SIZE(lmb_memory_region);
> +	lmb.reserved.region = lmb_reserved_region;
> +	lmb.reserved.region_array_size = ARRAY_SIZE(lmb_reserved_region);
> +

That's rather unreadable and has random whitespace noise.

Should be something like:

	lmb.memory.region		= lmb_memory_region;
	lmb.memory.region_array_size	= ARRAY_SIZE(lmb_memory_region);
	lmb.reserved.region		= lmb_reserved_region;
	lmb.reserved.region_array_size	= ARRAY_SIZE(lmb_reserved_region);

also, i'd suggest to shorten region_array_size to region_size (we know it's an 
array), so it would become:

	lmb.memory.region	 = lmb_memory_region;
	lmb.memory.region_size	 = ARRAY_SIZE(lmb_memory_region);

	lmb.reserved.region	 = lmb_reserved_region;
	lmb.reserved.region_size = ARRAY_SIZE(lmb_reserved_region);

> -	if (rgn->cnt >= MAX_LMB_REGIONS)
> +	if (rgn->cnt >= (rgn->region_array_size - 1))
>  		return -1;

'x >= y-1' is equivalent to 'x > y', so that should be:

	if (rgn->cnt > rgn->region_size)

	Ingo