From: "Rafael J. Wysocki" <rjw@rjwysocki.net>
To: Linux PM <linux-pm@vger.kernel.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
Viresh Kumar <viresh.kumar@linaro.org>
Subject: [PATCH v1 1/3] cpufreq: Reorganize checks in cpufreq_offline()
Date: Wed, 11 May 2022 17:48:41 +0200 [thread overview]
Message-ID: <4756874.31r3eYUQgx@kreacher> (raw)
In-Reply-To: <5585781.DvuYhMxLoT@kreacher>
From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Notice that cpufreq_offline() only needs to check policy_is_inactive()
once and rearrange the code in there to make that happen.
No expected functional impact.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
drivers/cpufreq/cpufreq.c | 24 ++++++++++++------------
1 file changed, 12 insertions(+), 12 deletions(-)
Index: linux-pm/drivers/cpufreq/cpufreq.c
===================================================================
--- linux-pm.orig/drivers/cpufreq/cpufreq.c
+++ linux-pm/drivers/cpufreq/cpufreq.c
@@ -1590,24 +1590,18 @@ static int cpufreq_offline(unsigned int
}
down_write(&policy->rwsem);
+
if (has_target())
cpufreq_stop_governor(policy);
cpumask_clear_cpu(cpu, policy->cpus);
- if (policy_is_inactive(policy)) {
- if (has_target())
- strncpy(policy->last_governor, policy->governor->name,
- CPUFREQ_NAME_LEN);
- else
- policy->last_policy = policy->policy;
- } else if (cpu == policy->cpu) {
- /* Nominate new CPU */
- policy->cpu = cpumask_any(policy->cpus);
- }
-
- /* Start governor again for active policy */
if (!policy_is_inactive(policy)) {
+ /* Nominate a new CPU if necessary. */
+ if (cpu == policy->cpu)
+ policy->cpu = cpumask_any(policy->cpus);
+
+ /* Start the governor again for the active policy. */
if (has_target()) {
ret = cpufreq_start_governor(policy);
if (ret)
@@ -1617,6 +1611,12 @@ static int cpufreq_offline(unsigned int
goto unlock;
}
+ if (has_target())
+ strncpy(policy->last_governor, policy->governor->name,
+ CPUFREQ_NAME_LEN);
+ else
+ policy->last_policy = policy->policy;
+
if (cpufreq_thermal_control_enabled(cpufreq_driver)) {
cpufreq_cooling_unregister(policy->cdev);
policy->cdev = NULL;
next prev parent reply other threads:[~2022-05-11 15:52 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-11 15:46 [PATCH v1 0/3] cpufreq: Locking-related changes in cpufreq_offline() and cpufreq_remove_dev() Rafael J. Wysocki
2022-05-11 15:48 ` Rafael J. Wysocki [this message]
2022-05-12 7:05 ` [PATCH v1 1/3] cpufreq: Reorganize checks in cpufreq_offline() Viresh Kumar
2022-05-11 15:50 ` [PATCH v1 2/3] cpufreq: Split cpufreq_offline() Rafael J. Wysocki
2022-05-12 7:28 ` Viresh Kumar
2022-05-11 15:51 ` [PATCH v1 3/3] cpufreq: Rearrange locking in cpufreq_remove_dev() Rafael J. Wysocki
2022-05-12 7:42 ` Viresh Kumar
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4756874.31r3eYUQgx@kreacher \
--to=rjw@rjwysocki.net \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pm@vger.kernel.org \
--cc=viresh.kumar@linaro.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox