Messages in this thread | | | Date | Sat, 6 Oct 2007 09:54:15 +0200 | From | Borislav Petkov <> | Subject | Re: [PATCH 1/1] unify DMA_..BIT_MASK definitions: v3.1 |
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On Fri, Oct 05, 2007 at 02:23:41PM -0700, Jeremy Fitzhardinge wrote: > 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". ... and ULLONG_MAX _is_ (~0ULL).
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