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

Message ID 1348242975-19184-13-git-send-email-cyril@ti.com (mailing list archive)
State New, archived
Headers show

Commit Message

Cyril Chemparathy Sept. 21, 2012, 3:56 p.m. UTC
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@ti.com>
Signed-off-by: Vitaly Andrianov <vitalya@ti.com>
---
 arch/arm/include/asm/memory.h |    2 ++
 1 file changed, 2 insertions(+)

Comments

Catalin Marinas Sept. 24, 2012, 2:16 p.m. UTC | #1
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@ti.com>
> Signed-off-by: Vitaly Andrianov <vitalya@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
>  #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.
diff mbox

Patch

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
+
 #endif
 
 #include <asm-generic/memory_model.h>