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PM / devfreq: Remove redundant governor_name from struct devfreq

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The devfreq structure instance contains the governor_name and a governor
instance. When need to show the governor name, better to use the name
of devfreq_governor structure. So, governor_name variable in struct devfreq
is a redundant and unneeded variable. Remove the redundant governor_name
of struct devfreq and then use the name of devfreq_governor instance.

Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
This commit is contained in:
Chanwoo Choi 2020-10-20 15:12:12 +09:00
parent 5f1a9066fc
commit 96ffcdf239
3 changed files with 9 additions and 15 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

18
drivers/devfreq/devfreq.c
View file

@ -811,7 +811,6 @@ struct devfreq *devfreq_add_device(struct device *dev,
devfreq->dev.release = devfreq_dev_release; devfreq->dev.release = devfreq_dev_release;
INIT_LIST_HEAD(&devfreq->node); INIT_LIST_HEAD(&devfreq->node);
devfreq->profile = profile; devfreq->profile = profile;
strscpy(devfreq->governor_name, governor_name, DEVFREQ_NAME_LEN);
devfreq->previous_freq = profile->initial_freq; devfreq->previous_freq = profile->initial_freq;
devfreq->last_status.current_frequency = profile->initial_freq; devfreq->last_status.current_frequency = profile->initial_freq;
devfreq->data = data; devfreq->data = data;
@ -907,7 +906,7 @@ struct devfreq *devfreq_add_device(struct device *dev,
mutex_lock(&devfreq_list_lock); mutex_lock(&devfreq_list_lock);
governor = try_then_request_governor(devfreq->governor_name); governor = try_then_request_governor(governor_name);
if (IS_ERR(governor)) { if (IS_ERR(governor)) {
dev_err(dev, "%s: Unable to find governor for the device\n", dev_err(dev, "%s: Unable to find governor for the device\n",
__func__); __func__);
@ -1249,7 +1248,7 @@ int devfreq_add_governor(struct devfreq_governor *governor)
int ret = 0; int ret = 0;
struct device *dev = devfreq->dev.parent; struct device *dev = devfreq->dev.parent;
if (!strncmp(devfreq->governor_name, governor->name, if (!strncmp(devfreq->governor->name, governor->name,
DEVFREQ_NAME_LEN)) { DEVFREQ_NAME_LEN)) {
/* The following should never occur */ /* The following should never occur */
if (devfreq->governor) { if (devfreq->governor) {
@ -1311,7 +1310,7 @@ int devfreq_remove_governor(struct devfreq_governor *governor)
int ret; int ret;
struct device *dev = devfreq->dev.parent; struct device *dev = devfreq->dev.parent;
if (!strncmp(devfreq->governor_name, governor->name, if (!strncmp(devfreq->governor->name, governor->name,
DEVFREQ_NAME_LEN)) { DEVFREQ_NAME_LEN)) {
/* we should have a devfreq governor! */ /* we should have a devfreq governor! */
if (!devfreq->governor) { if (!devfreq->governor) {
@ -1406,7 +1405,6 @@ static ssize_t governor_store(struct device *dev, struct device_attribute *attr,
*/ */
prev_governor = df->governor; prev_governor = df->governor;
df->governor = governor; df->governor = governor;
strncpy(df->governor_name, governor->name, DEVFREQ_NAME_LEN);
ret = df->governor->event_handler(df, DEVFREQ_GOV_START, NULL); ret = df->governor->event_handler(df, DEVFREQ_GOV_START, NULL);
if (ret) { if (ret) {
dev_warn(dev, "%s: Governor %s not started(%d)\n", dev_warn(dev, "%s: Governor %s not started(%d)\n",
@ -1414,13 +1412,11 @@ static ssize_t governor_store(struct device *dev, struct device_attribute *attr,
/* Restore previous governor */ /* Restore previous governor */
df->governor = prev_governor; df->governor = prev_governor;
strncpy(df->governor_name, prev_governor->name,
DEVFREQ_NAME_LEN);
ret = df->governor->event_handler(df, DEVFREQ_GOV_START, NULL); ret = df->governor->event_handler(df, DEVFREQ_GOV_START, NULL);
if (ret) { if (ret) {
dev_err(dev, dev_err(dev,
"%s: reverting to Governor %s failed (%d)\n", "%s: reverting to Governor %s failed (%d)\n",
__func__, df->governor_name, ret); __func__, prev_governor->name, ret);
df->governor = NULL; df->governor = NULL;
goto out; goto out;
} }
@ -1459,7 +1455,7 @@ static ssize_t available_governors_show(struct device *d,
*/ */
if (IS_SUPPORTED_FLAG(df->governor->flags, IMMUTABLE)) { if (IS_SUPPORTED_FLAG(df->governor->flags, IMMUTABLE)) {
count = scnprintf(&buf[count], DEVFREQ_NAME_LEN, count = scnprintf(&buf[count], DEVFREQ_NAME_LEN,
"%s ", df->governor_name); "%s ", df->governor->name);
/* /*
* The devfreq device shows the registered governor except for * The devfreq device shows the registered governor except for
* immutable governors such as passive governor . * immutable governors such as passive governor .
@ -1902,7 +1898,7 @@ static int devfreq_summary_show(struct seq_file *s, void *data)
list_for_each_entry_reverse(devfreq, &devfreq_list, node) { list_for_each_entry_reverse(devfreq, &devfreq_list, node) {
#if IS_ENABLED(CONFIG_DEVFREQ_GOV_PASSIVE) #if IS_ENABLED(CONFIG_DEVFREQ_GOV_PASSIVE)
if (!strncmp(devfreq->governor_name, DEVFREQ_GOV_PASSIVE, if (!strncmp(devfreq->governor->name, DEVFREQ_GOV_PASSIVE,
DEVFREQ_NAME_LEN)) { DEVFREQ_NAME_LEN)) {
struct devfreq_passive_data *data = devfreq->data; struct devfreq_passive_data *data = devfreq->data;
@ -1928,7 +1924,7 @@ static int devfreq_summary_show(struct seq_file *s, void *data)
"%-30s %-30s %-15s %-10s %10d %12ld %12ld %12ld\n", "%-30s %-30s %-15s %-10s %10d %12ld %12ld %12ld\n",
dev_name(&devfreq->dev), dev_name(&devfreq->dev),
p_devfreq ? dev_name(&p_devfreq->dev) : "null", p_devfreq ? dev_name(&p_devfreq->dev) : "null",
devfreq->governor_name, devfreq->governor->name,
polling_ms ? timer_name[timer] : "null", polling_ms ? timer_name[timer] : "null",
polling_ms, polling_ms,
cur_freq, cur_freq,

2
drivers/devfreq/governor.h
View file

@ -13,6 +13,8 @@
#include <linux/devfreq.h> #include <linux/devfreq.h>
#define DEVFREQ_NAME_LEN 16
#define to_devfreq(DEV) container_of((DEV), struct devfreq, dev) #define to_devfreq(DEV) container_of((DEV), struct devfreq, dev)
/* Devfreq events */ /* Devfreq events */

4
include/linux/devfreq.h
View file

@ -15,8 +15,6 @@
#include <linux/pm_opp.h> #include <linux/pm_opp.h>
#include <linux/pm_qos.h> #include <linux/pm_qos.h>
#define DEVFREQ_NAME_LEN 16
/* DEVFREQ governor name */ /* DEVFREQ governor name */
#define DEVFREQ_GOV_SIMPLE_ONDEMAND "simple_ondemand" #define DEVFREQ_GOV_SIMPLE_ONDEMAND "simple_ondemand"
#define DEVFREQ_GOV_PERFORMANCE "performance" #define DEVFREQ_GOV_PERFORMANCE "performance"
@ -139,7 +137,6 @@ struct devfreq_stats {
* using devfreq. * using devfreq.
* @profile: device-specific devfreq profile * @profile: device-specific devfreq profile
* @governor: method how to choose frequency based on the usage. * @governor: method how to choose frequency based on the usage.
* @governor_name: devfreq governor name for use with this devfreq
* @nb: notifier block used to notify devfreq object that it should * @nb: notifier block used to notify devfreq object that it should
* reevaluate operable frequencies. Devfreq users may use * reevaluate operable frequencies. Devfreq users may use
* devfreq.nb to the corresponding register notifier call chain. * devfreq.nb to the corresponding register notifier call chain.
@ -176,7 +173,6 @@ struct devfreq {
struct device dev; struct device dev;
struct devfreq_dev_profile *profile; struct devfreq_dev_profile *profile;
const struct devfreq_governor *governor; const struct devfreq_governor *governor;
char governor_name[DEVFREQ_NAME_LEN];
struct notifier_block nb; struct notifier_block nb;
struct delayed_work work; struct delayed_work work;