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ecfb9f4047
The previous algorithm was pretty broken.
- The inner loop had a '(m > m_max)' condition, and the value of 'm'
would increase in each iteration;
- Each iteration would actually multiply 'm' by two, so it is not needed
to re-compute the whole equation at each iteration;
- It would loop until (m & 1) == 0, which means it would loop at most
once.
- The outer loop would divide the 'n' value by two at the end of each
iteration. This meant that for a 12 MHz parent clock and a 1.2 GHz
requested clock, it would first try n=12, then n=6, then n=3, then
n=1, none of which would work; the only valid value is n=2 in this
case.
Simplify this algorithm with a single for loop, which decrements 'n'
after each iteration, addressing all of the above problems.
Fixes:
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| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.