linux-kernel - Re: [PATCH RESEND 2/6] MIPS: pfn_valid() is broken on low memory HIGHMEM systems

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Message-ID: <4D25FDA3.5000807@caviumnetworks.com>
Date:	Thu, 06 Jan 2011 09:36:35 -0800
From:	David Daney <ddaney@...iumnetworks.com>
To:	Kevin Cernekee <cernekee@...il.com>
CC:	Ralf Baechle <ralf@...ux-mips.org>, linux-mips@...ux-mips.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH RESEND 2/6] MIPS: pfn_valid() is broken on low memory
 HIGHMEM systems

On 01/05/2011 11:31 PM, Kevin Cernekee wrote:
[...]
> diff --git a/arch/mips/mm/init.c b/arch/mips/mm/init.c
> index 2efcbd2..18183a4 100644
> --- a/arch/mips/mm/init.c
> +++ b/arch/mips/mm/init.c
> @@ -370,7 +370,7 @@ void __init mem_init(void)
>   #ifdef CONFIG_DISCONTIGMEM
>   #error "CONFIG_HIGHMEM and CONFIG_DISCONTIGMEM dont work together yet"
>   #endif
> -	max_mapnr = highend_pfn;
> +	max_mapnr = highend_pfn ? : max_low_pfn;

That is not standard C.

How about: max_mapnr = highend_pfn ? highend_pfn : max_low_pfn;

David Daney
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