1RECIPROCAL_SCALE(9)              Driver Basics             RECIPROCAL_SCALE(9)
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NAME

6       reciprocal_scale - "scale" a value into range [0, ep_ro)
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SYNOPSIS

9       u32 reciprocal_scale(u32 val, u32 ep_ro);
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ARGUMENTS

12       val
13           value
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15       ep_ro
16           right open interval endpoint
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DESCRIPTION

19       Perform a “reciprocal multiplication” in order to “scale” a value into
20       range [0, ep_ro), where the upper interval endpoint is right-open. This
21       is useful, e.g. for accessing a index of an array containing ep_ro
22       elements, for example. Think of it as sort of modulus, only that the
23       result isn't that of modulo. ;) Note that if initial input is a small
24       value, then result will return 0.
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RETURN

27       a result based on val in interval [0, ep_ro).
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30Kernel Hackers Manual 3.10         June 2019               RECIPROCAL_SCALE(9)
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