linux-kernel - Re: [PATCH v4 07/13] ARM: LPAE: define ARCH_LOW_ADDRESS

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Date:	Thu, 31 Jan 2013 22:42:57 -0500 (EST)
From:	Nicolas Pitre <nicolas.pitre@...aro.org>
To:	Cyril Chemparathy <cyril@...com>
cc:	linux@....linux.org.uk, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, sboyd@...eaurora.org,
	will.deacon@....com, paulmck@...ux.vnet.ibm.com,
	catalin.marinas@....com, marc.zyngier@....com,
	linus.walleij@...aro.org, Vitaly Andrianov <vitalya@...com>
Subject: Re: [PATCH v4 07/13] ARM: LPAE: define ARCH_LOW_ADDRESS_LIMIT for
 bootmem

On Thu, 31 Jan 2013, Cyril Chemparathy wrote:

> This patch adds an architecture defined override for ARCH_LOW_ADDRESS_LIMIT.
> On PAE systems, the absence of this override causes bootmem to incorrectly
> limit itself to 32-bit addressable physical memory.
> 
> Signed-off-by: Cyril Chemparathy <cyril@...com>
> Signed-off-by: Vitaly Andrianov <vitalya@...com>

Acked-by: Nicolas Pitre <nico@...aro.org>


> ---
>  arch/arm/include/asm/memory.h |    2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/arch/arm/include/asm/memory.h b/arch/arm/include/asm/memory.h
> index 73cf03a..8825abb 100644
> --- a/arch/arm/include/asm/memory.h
> +++ b/arch/arm/include/asm/memory.h
> @@ -275,6 +275,8 @@ static inline __deprecated void *bus_to_virt(unsigned long x)
>  #define virt_to_page(kaddr)	pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
>  #define virt_addr_valid(kaddr)	((unsigned long)(kaddr) >= PAGE_OFFSET && (unsigned long)(kaddr) < (unsigned long)high_memory)
>  
> +#define ARCH_LOW_ADDRESS_LIMIT		PHYS_MASK
> +
>  #endif
>  
>  #include <asm-generic/memory_model.h>
> -- 
> 1.7.9.5
> 
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