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

Jeremy Fitzhardinge
2007-10-05T20:44:18Z

Andrew Morton wrote:
> From: Andrew Morton <akpm@linux-foundation.org>
>
> Now that we have DMA_BIT_MASK(), these macros are pointless.
>

Except, unfortunately, DMA_64BIT_MASK. I guess we could special case
it, assuming this works in all the contexts the macro is used in (ie,
compile-time constant?):

#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))

J