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From: Lukasz Luba <lukasz.luba@arm.com>
To: linux-kernel@vger.kernel.org,
	linux-pm@vger.kernel.org,
	rafael@kernel.org
Cc: lukasz.luba@arm.com,
	dietmar.eggemann@arm.com,
	rui.zhang@intel.com,
	amit.kucheria@verdurent.com,
	amit.kachhap@gmail.com,
	daniel.lezcano@linaro.org,
	viresh.kumar@linaro.org,
	len.brown@intel.com,
	pavel@ucw.cz,
	mhiramat@kernel.org,
	qyousef@layalina.io,
	wvw@google.com,
	xuewen.yan94@gmail.com,
	Hongyan Xia <hongyan.xia2@arm.com>
Subject: [PATCH v8 02/23] PM: EM: Extend em_cpufreq_update_efficiencies() argument list
Date: Thu,  8 Feb 2024 11:55:36 +0000
Message-Id: <20240208115557.1273962-3-lukasz.luba@arm.com>
In-Reply-To: <20240208115557.1273962-1-lukasz.luba@arm.com>
References: <20240208115557.1273962-1-lukasz.luba@arm.com>
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In order to prepare the code for the modifiable EM perf_state table,
make em_cpufreq_update_efficiencies() take a pointer to the EM table
as its second argument and modify it to use that new argument instead
of the 'table' member of dev->em_pd.

No functional impact.

Reviewed-by: Hongyan Xia <hongyan.xia2@arm.com>
Reviewed-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Tested-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
---
 kernel/power/energy_model.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/kernel/power/energy_model.c b/kernel/power/energy_model.c
index 8b9dd4a39f63..8c373b151875 100644
--- a/kernel/power/energy_model.c
+++ b/kernel/power/energy_model.c
@@ -237,15 +237,15 @@ static int em_create_pd(struct device *dev, int nr_states,
 	return 0;
 }
 
-static void em_cpufreq_update_efficiencies(struct device *dev)
+static void
+em_cpufreq_update_efficiencies(struct device *dev, struct em_perf_state *table)
 {
 	struct em_perf_domain *pd = dev->em_pd;
-	struct em_perf_state *table;
 	struct cpufreq_policy *policy;
 	int found = 0;
 	int i;
 
-	if (!_is_cpu_device(dev) || !pd)
+	if (!_is_cpu_device(dev))
 		return;
 
 	policy = cpufreq_cpu_get(cpumask_first(em_span_cpus(pd)));
@@ -254,8 +254,6 @@ static void em_cpufreq_update_efficiencies(struct device *dev)
 		return;
 	}
 
-	table = pd->table;
-
 	for (i = 0; i < pd->nr_perf_states; i++) {
 		if (!(table[i].flags & EM_PERF_STATE_INEFFICIENT))
 			continue;
@@ -397,7 +395,7 @@ int em_dev_register_perf_domain(struct device *dev, unsigned int nr_states,
 
 	dev->em_pd->flags |= flags;
 
-	em_cpufreq_update_efficiencies(dev);
+	em_cpufreq_update_efficiencies(dev, dev->em_pd->table);
 
 	em_debug_create_pd(dev);
 	dev_info(dev, "EM: created perf domain\n");
-- 
2.25.1