cpufreq: governor: Make governor private data per-policy
authorRafael J. Wysocki <rafael.j.wysocki@intel.com>
Thu, 18 Feb 2016 17:40:14 +0000 (18:40 +0100)
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>
Wed, 9 Mar 2016 13:41:08 +0000 (14:41 +0100)
commit7d5a9956af4ccf7d5cc0cd1f8d27d1691321bfc6
treeb88c44858b80d9d9e4f0ad67f639b5ab9589afa1
parentd1db75fffc22504c586c3fae8d602384ea899340
cpufreq: governor: Make governor private data per-policy

Some fields in struct od_cpu_dbs_info_s and struct cs_cpu_dbs_info_s
are only used for a limited set of CPUs.  Namely, if a policy is
shared between multiple CPUs, those fields will only be used for one
of them (policy->cpu).  This means that they really are per-policy
rather than per-CPU and holding room for them in per-CPU data
structures is generally wasteful.  Also moving those fields into
per-policy data structures will allow some significant simplifications
to be made going forward.

For this reason, introduce struct cs_policy_dbs_info and
struct od_policy_dbs_info to hold those fields.  Define each of the
new structures as an extension of struct policy_dbs_info (such that
struct policy_dbs_info is embedded in each of them) and introduce
new ->alloc and ->free governor callbacks to allocate and free
those structures, respectively, such that ->alloc() will return
a pointer to the struct policy_dbs_info embedded in the allocated
data structure and ->free() will take that pointer as its argument.

With that, modify the code accessing the data fields in question
in per-CPU data objects to look for them in the new structures
via the struct policy_dbs_info pointer available to it and drop
them from struct od_cpu_dbs_info_s and struct cs_cpu_dbs_info_s.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
drivers/cpufreq/amd_freq_sensitivity.c
drivers/cpufreq/cpufreq_conservative.c
drivers/cpufreq/cpufreq_governor.c
drivers/cpufreq/cpufreq_governor.h
drivers/cpufreq/cpufreq_ondemand.c
drivers/cpufreq/cpufreq_ondemand.h [new file with mode: 0644]