Re: device-mapper: fix TB stripe data corruption

[Roland Dreier]

    Kevin> We have to take a mod of the chunk value and the number of
    Kevin> stripes (which can be a non-power-of-2, so a shift won't
    Kevin> work). It's been my understanding that you couldn't mod a
    Kevin> 64-bit value with a 32-bit value in the kernel.

If I understand you correctly, do_div() (defined in <asm/div64.h>)
does what you need.  Look at asm-generic/div64.h for a good
description of the precise semantics of do_div().

 - Roland
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