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When converting to a shared library inac5a181d06("cpupower: Add cpuidle parts into library"), cpu_freq_cpu_exists() was converted to cpupower_is_cpu_online(). cpu_req_cpu_exists() returned 0 on success and -ENOSYS on failure whereas cpupower_is_cpu_online returns 1 on success. Check for the correct return value in cpufreq-set. Link: https://bugzilla.redhat.com/show_bug.cgi?id=1374212 Fixes:ac5a181d06(cpupower: Add cpuidle parts into library) Reported-by: Julian Seward <jseward@acm.org> Signed-off-by: Laura Abbott <labbott@redhat.com> Acked-by: Thomas Renninger <trenn@suse.com> Cc: 4.7+ <stable@vger.kernel.org> # 4.7+ Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
The cpupower package consists of the following elements:
requirements
------------
On x86 pciutils is needed at runtime (-lpci).
For compilation pciutils-devel (pci/pci.h) and a gcc version
providing cpuid.h is needed.
For both it's not explicitly checked for (yet).
libcpupower
----------
"libcpupower" is a library which offers a unified access method for userspace
tools and programs to the cpufreq core and drivers in the Linux kernel. This
allows for code reduction in userspace tools, a clean implementation of
the interaction to the cpufreq core, and support for both the sysfs and proc
interfaces [depending on configuration, see below].
compilation and installation
----------------------------
make
su
make install
should suffice on most systems. It builds libcpupower to put in
/usr/lib; cpupower, cpufreq-bench_plot.sh to put in /usr/bin; and
cpufreq-bench to put in /usr/sbin. If you want to set up the paths
differently and/or want to configure the package to your specific
needs, you need to open "Makefile" with an editor of your choice and
edit the block marked CONFIGURATION.
THANKS
------
Many thanks to Mattia Dongili who wrote the autotoolization and
libtoolization, the manpages and the italian language file for cpupower;
to Dave Jones for his feedback and his dump_psb tool; to Bruno Ducrot for his
powernow-k8-decode and intel_gsic tools as well as the french language file;
and to various others commenting on the previous (pre-)releases of
cpupower.
Dominik Brodowski