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

Jeremy Fitzhardinge
2007-10-05T21:23:58Z

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