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| author | Dirk Brandewie <dirk.j.brandewie@intel.com> | 2014-03-19 08:45:53 -0700 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2014-03-20 03:50:12 +0100 |
| commit | 367dc4aa932bfb33a3189064d33f7890a8ec1ca8 (patch) | |
| tree | fde9bd6004ff7852da144a373dd1c0536521efef /include/linux/cpufreq.h | |
| parent | bda9f552f9826313ef8a477fc8e4891de9ae5e73 (diff) | |
| download | lwn-367dc4aa932bfb33a3189064d33f7890a8ec1ca8.tar.gz lwn-367dc4aa932bfb33a3189064d33f7890a8ec1ca8.zip | |
cpufreq: Add stop CPU callback to cpufreq_driver interface
This callback allows the driver to do clean up before the CPU is
completely down and its state cannot be modified. This is used
by the intel_pstate driver to reduce the requested P state prior to
the core going away. This is required because the requested P state
of the offline core is used to select the package P state. This
effectively sets the floor package P state to the requested P state on
the offline core.
Signed-off-by: Dirk Brandewie <dirk.j.brandewie@intel.com>
[rjw: Minor modifications]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'include/linux/cpufreq.h')
| -rw-r--r-- | include/linux/cpufreq.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h index 70929bcf1a9d..2d2e62c8666a 100644 --- a/include/linux/cpufreq.h +++ b/include/linux/cpufreq.h @@ -227,6 +227,7 @@ struct cpufreq_driver { int (*bios_limit) (int cpu, unsigned int *limit); int (*exit) (struct cpufreq_policy *policy); + void (*stop_cpu) (struct cpufreq_policy *policy); int (*suspend) (struct cpufreq_policy *policy); int (*resume) (struct cpufreq_policy *policy); struct freq_attr **attr; |