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

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To: Jeremy Fitzhardinge <jeremy@...>

Cc: Robert P. J. Day <rpjday@...>, Andrew Morton <akpm@...>, <linux-kernel@...>, <muli@...>, <satyam@...>, <amitkale@...>, <achim_leubner@...>

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

Date: Saturday, October 6, 2007 - 3:54 am

On Fri, Oct 05, 2007 at 02:23:41PM -0700, Jeremy Fitzhardinge wrote:
quoted text> 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).

-- 
Regards/Gruß,
    Boris.
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Messages in current thread:

[PATCH 1/1] unify DMA_..BIT_MASK definitions: v3.1, Borislav Petkov, (Tue Sep 18, 3:46 pm)

Re: [PATCH 1/1] unify DMA_..BIT_MASK definitions: v3.1, Andrew Morton, (Fri Oct 5, 3:47 pm)

Re: [PATCH 1/1] unify DMA_..BIT_MASK definitions: v3.1, Jeremy Fitzhardinge, (Fri Oct 5, 4:43 pm)

Re: [PATCH 1/1] unify DMA_..BIT_MASK definitions: v3.1, Andrew Morton, (Fri Oct 5, 5:00 pm)

Re: [PATCH 1/1] unify DMA_..BIT_MASK definitions: v3.1, Borislav Petkov, (Sat Oct 6, 4:37 am)

Re: [PATCH 1/1] unify DMA_..BIT_MASK definitions: v3.1, Robert P. J. Day, (Fri Oct 5, 5:03 pm)

Re: [PATCH 1/1] unify DMA_..BIT_MASK definitions: v3.1, Andreas Schwab, (Fri Oct 5, 5:24 pm)

Re: [PATCH 1/1] unify DMA_..BIT_MASK definitions: v3.1, Jeremy Fitzhardinge, (Fri Oct 5, 5:28 pm)

Re: [PATCH 1/1] unify DMA_..BIT_MASK definitions: v3.1, Andrew Morton, (Fri Oct 5, 6:24 pm)

Re: [PATCH 1/1] unify DMA_..BIT_MASK definitions: v3.1, Jeremy Fitzhardinge, (Fri Oct 5, 6:32 pm)

Re: [PATCH 1/1] unify DMA_..BIT_MASK definitions: v3.1, Jeremy Fitzhardinge, (Fri Oct 5, 5:23 pm)

Re: [PATCH 1/1] unify DMA_..BIT_MASK definitions: v3.1, Borislav Petkov, (Sat Oct 6, 3:54 am)

Re: [PATCH 1/1] unify DMA_..BIT_MASK definitions: v3.1, Satyam Sharma, (Wed Sep 19, 11:03 am)


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

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