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    Subject[PATCH v6 03/18] ARM: LPAE: Use unsigned long for __phys_to_virt and __virt_to_phys
    The !CONFIG_ARM_PATCH_PHYS_VIRT case uses macros for __phys_to_virt and
    __virt_to_phys but does not use any type casting. This causes compiler
    warnings with LPAE where the phys_addr_t and dma_addr_t are 64-bit:

    CC arch/arm/mm/dma-mapping.o
    In file included from /work/Linux/linux-marc/include/linux/dma-mapping.h:93:0,
    from /work/Linux/linux-marc/arch/arm/mm/dma-mapping.c:19:
    /work/Linux/linux-marc/arch/arm/include/asm/dma-mapping.h: In function 'dma_to_virt':
    /work/Linux/linux-marc/arch/arm/include/asm/dma-mapping.h:35:9: warning:
    cast to pointer from integer of different size

    Note that these macros are only valid for lowmem physical addresses
    where the range is within 32-bit address range.

    Signed-off-by: Catalin Marinas <>
    arch/arm/include/asm/memory.h | 4 ++--
    1 files changed, 2 insertions(+), 2 deletions(-)

    diff --git a/arch/arm/include/asm/memory.h b/arch/arm/include/asm/memory.h
    index 431077c..10e4b4c 100644
    --- a/arch/arm/include/asm/memory.h
    +++ b/arch/arm/include/asm/memory.h
    @@ -194,8 +194,8 @@ static inline unsigned long __phys_to_virt(unsigned long x)
    return t;
    -#define __virt_to_phys(x) ((x) - PAGE_OFFSET + PHYS_OFFSET)
    -#define __phys_to_virt(x) ((x) - PHYS_OFFSET + PAGE_OFFSET)
    +#define __virt_to_phys(x) ((unsigned long)(x) - PAGE_OFFSET + PHYS_OFFSET)
    +#define __phys_to_virt(x) ((unsigned long)(x) - PHYS_OFFSET + PAGE_OFFSET)

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      Last update: 2011-05-24 23:41    [W:0.020 / U:10.680 seconds]
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