[PATCH v3 RESEND 12/17] ARM: LPAE: define ARCH_LOW_ADDRESS_LIMIT for bootmem
catalin.marinas at arm.com
Mon Sep 24 10:16:54 EDT 2012
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 <cyril at ti.com>
> Signed-off-by: Vitaly Andrianov <vitalya at ti.com>
> 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
> +#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.
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