Re: [PATCH 1/1] unify DMA_..BIT_MASK definitions: v3.1

[Jeremy Fitzhardinge]

Robert P. J. Day wrote:
> or you could take advantage of the macros in kernel.h and write that
> as:
>
> +#define DMA_BIT_MASK(n)      (((n) == 64) ? ULLONG_MAX : ((1ULL<<(n))-1))
>   

But that's a more indirect way of expressing "I want all 1's".

    J
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