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DateTue, 14 Mar 2006 02:13:08 -0500
FromJeff Garzik <>
SubjectRe: [PATCH 2.6.16-rc6] Promise SuperTrak driver
Andrew Morton wrote:
> "Ed Lin" <ed.lin@promise.com> wrote:
>>I guess DMA_32BIT_MASK is OK?
>
>
> If that's semantically what the 0xffffffff means then yes.


It means "select lower 32 bits, because the other 32 bits are
elsewhere." Since its an arg to cpu_to_le32() I suppose there is an
implicit truncation in there, but I add such masking myself to my own
code. Makes it more clear to the reader what's going on, IMO.

Its not quite what DMA_32BIT_MASK intends, either, IMO.

Jeff


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