On Tue, Sep 18, 2007 at 06:29:19AM +0200, Borislav Petkov wrote:
> These patches remove redundant DMA_..BIT_MASK definitions across two drivers.
> In this version of the patches, the computation of the bitmasks is done by
> the compiler.
>
> Signed-off-by: Borislav Petkov <[email protected]>
> Cc: Jeremy Fitzhardinge <[email protected]>
>
> --
> Index: 23-rc6/include/linux/dma-mapping.h
> ===================================================================
> --- 23-rc6/include/linux/dma-mapping.h.orig 2007-09-17 17:48:20.000000000 +0200
> +++ 23-rc6/include/linux/dma-mapping.h 2007-09-18 06:12:33.000000000 +0200
> @@ -13,16 +13,19 @@
> DMA_NONE = 3,
> };
>
> -#define DMA_64BIT_MASK 0xffffffffffffffffULL
> -#define DMA_48BIT_MASK 0x0000ffffffffffffULL
> -#define DMA_40BIT_MASK 0x000000ffffffffffULL
> -#define DMA_39BIT_MASK 0x0000007fffffffffULL
> -#define DMA_32BIT_MASK 0x00000000ffffffffULL
> -#define DMA_31BIT_MASK 0x000000007fffffffULL
> -#define DMA_30BIT_MASK 0x000000003fffffffULL
> -#define DMA_29BIT_MASK 0x000000001fffffffULL
> -#define DMA_28BIT_MASK 0x000000000fffffffULL
> -#define DMA_24BIT_MASK 0x0000000000ffffffULL
> +#define DMA_BIT_MASK(n) ((1ULL<<(n))-1)
> +
> +#define DMA_64BIT_MASK DMA_BIT_MASK(64)
This one does not do what you mean. You need an explicit mask or a
~0ULL here.
Cheers,
Muli
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