• Rafael J. Wysocki's avatar
    cpufreq: governor: Make governor private data per-policy · 7d5a9956
    Rafael J. Wysocki authored
    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: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
    Acked-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
    7d5a9956
cpufreq_ondemand.c 13.9 KB