From 7d5a9956af4ccf7d5cc0cd1f8d27d1691321bfc6 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Thu, 18 Feb 2016 18:40:14 +0100 Subject: 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 Acked-by: Viresh Kumar --- drivers/cpufreq/cpufreq_governor.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) (limited to 'drivers/cpufreq/cpufreq_governor.c') diff --git a/drivers/cpufreq/cpufreq_governor.c b/drivers/cpufreq/cpufreq_governor.c index 4b14f04daa41..6cbc846e3981 100644 --- a/drivers/cpufreq/cpufreq_governor.c +++ b/drivers/cpufreq/cpufreq_governor.c @@ -385,8 +385,8 @@ static struct policy_dbs_info *alloc_policy_dbs_info(struct cpufreq_policy *poli struct policy_dbs_info *policy_dbs; int j; - /* Allocate memory for the common information for policy->cpus */ - policy_dbs = kzalloc(sizeof(*policy_dbs), GFP_KERNEL); + /* Allocate memory for per-policy governor data. */ + policy_dbs = gov->alloc(); if (!policy_dbs) return NULL; @@ -421,7 +421,7 @@ static void free_policy_dbs_info(struct cpufreq_policy *policy, j_cdbs->policy_dbs = NULL; j_cdbs->update_util.func = NULL; } - kfree(policy_dbs); + gov->free(policy_dbs); } static int cpufreq_governor_init(struct cpufreq_policy *policy) @@ -582,7 +582,6 @@ static int cpufreq_governor_start(struct cpufreq_policy *policy) static int cpufreq_governor_stop(struct cpufreq_policy *policy) { gov_cancel_work(policy); - return 0; } -- cgit v1.2.3