Subject: [PATCH v3 RESEND 12/17] ARM: LPAE: define ARCH_LOW_ADDRESS_LIMIT for bootmem

From: [email-masked] (Catalin Marinas)
Date: Mon, 24 Sep 2012 15:16:54 +0100

On Fri, Sep 21, 2012 at 04:56:10PM +0100, 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 <[email-masked]>
> Signed-off-by: Vitaly Andrianov <[email-masked]>
> ---
>  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 f3e8f88..19221c2 100644
> --- a/arch/arm/include/asm/memory.h
> +++ b/arch/arm/include/asm/memory.h
> @@ -315,6 +315,8 @@ static inline __deprecated void *bus_to_virt(unsigned long x)
>  #define arch_is_coherent()		0
>  #endif
>  
> +#define ARCH_LOW_ADDRESS_LIMIT		PHYS_MASK

It looks like mm/bootmem.c casts this to unsigned long anyway, so the
patch doesn't have any effect on its own.

-- 
Catalin