linux-kernel - [PATCH] cpufreq: schedutil: Merge initialization code of sg

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Date:   Fri, 8 Sep 2023 03:16:04 +0000
From:   Liao Chang <liaochang1@...wei.com>
To:     <rafael@...nel.org>, <viresh.kumar@...aro.org>, <mingo@...hat.com>,
        <peterz@...radead.org>, <juri.lelli@...hat.com>,
        <vincent.guittot@...aro.org>, <dietmar.eggemann@....com>,
        <rostedt@...dmis.org>, <bsegall@...gle.com>, <mgorman@...e.de>,
        <bristot@...hat.com>, <vschneid@...hat.com>
CC:     <linux-pm@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH] cpufreq: schedutil: Merge initialization code of sg_cpu in single loop

The initialization code of the per-cpu sg_cpu struct is currently split
into two for-loop blocks. This can be simplified by merging the two
blocks into a single loop. This will make the code more maintainable.

Signed-off-by: Liao Chang <liaochang1@...wei.com>
---
 kernel/sched/cpufreq_schedutil.c | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/kernel/sched/cpufreq_schedutil.c b/kernel/sched/cpufreq_schedutil.c
index 4492608b7d7f..f3a95def49cc 100644
--- a/kernel/sched/cpufreq_schedutil.c
+++ b/kernel/sched/cpufreq_schedutil.c
@@ -767,14 +767,6 @@ static int sugov_start(struct cpufreq_policy *policy)
 
 	sg_policy->need_freq_update = cpufreq_driver_test_flags(CPUFREQ_NEED_UPDATE_LIMITS);
 
-	for_each_cpu(cpu, policy->cpus) {
-		struct sugov_cpu *sg_cpu = &per_cpu(sugov_cpu, cpu);
-
-		memset(sg_cpu, 0, sizeof(*sg_cpu));
-		sg_cpu->cpu			= cpu;
-		sg_cpu->sg_policy		= sg_policy;
-	}
-
 	if (policy_is_shared(policy))
 		uu = sugov_update_shared;
 	else if (policy->fast_switch_enabled && cpufreq_driver_has_adjust_perf())
@@ -785,6 +777,9 @@ static int sugov_start(struct cpufreq_policy *policy)
 	for_each_cpu(cpu, policy->cpus) {
 		struct sugov_cpu *sg_cpu = &per_cpu(sugov_cpu, cpu);
 
+		memset(sg_cpu, 0, sizeof(*sg_cpu));
+		sg_cpu->cpu = cpu;
+		sg_cpu->sg_policy = sg_policy;
 		cpufreq_add_update_util_hook(cpu, &sg_cpu->update_util, uu);
 	}
 	return 0;
-- 
2.34.1