RECIPROCAL_SCALE(9)                       Driver Basics                       RECIPROCAL_SCALE(9)



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

SYNOPSIS
       u32 reciprocal_scale(u32 val, u32 ep_ro);

ARGUMENTS
       val
           value

       ep_ro
           right open interval endpoint

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

RETURN
       a result based on val in interval [0, ep_ro).

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                       RECIPROCAL_SCALE(9)