6a4fec4f6d
The cpufreq framework used to use the zero of return value to reflect the cppc_cpufreq_get_rate() had failed to get current frequecy and treat all positive integer to be succeed. Since cppc_get_perf_ctrs() returns a negative integer in error case, so it is better to convert the value to zero as the return value of cppc_cpufreq_get_rate(). Signed-off-by: Liao Chang <liaochang1@huawei.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
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.