linux-kernel - [PATCH v2 5/5] arch_topology: Remove unused topology_set_thermal

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Message-Id: <20211015144550.23719-6-lukasz.luba@arm.com>
Date:   Fri, 15 Oct 2021 15:45:50 +0100
From:   Lukasz Luba <lukasz.luba@....com>
To:     linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org
Cc:     linux-arm-kernel@...ts.infradead.org,
        linux-arm-msm@...r.kernel.org, lukasz.luba@....com,
        sudeep.holla@....com, will@...nel.org, catalin.marinas@....com,
        linux@...linux.org.uk, gregkh@...uxfoundation.org,
        rafael@...nel.org, viresh.kumar@...aro.org, amitk@...nel.org,
        daniel.lezcano@...aro.org, amit.kachhap@...il.com,
        thara.gopinath@...aro.org, bjorn.andersson@...aro.org,
        agross@...nel.org
Subject: [PATCH v2 5/5] arch_topology: Remove unused topology_set_thermal_pressure() and related

There is no need of this function (and related) since code has been
converted to use the new arch_thermal_pressure_update() API. The old
code can be removed.

Signed-off-by: Lukasz Luba <lukasz.luba@....com>
---
 arch/arm/include/asm/topology.h   |  1 -
 arch/arm64/include/asm/topology.h |  1 -
 drivers/base/arch_topology.c      | 17 +++++------------
 include/linux/arch_topology.h     |  3 ---
 include/linux/sched/topology.h    |  7 -------
 init/Kconfig                      |  2 +-
 6 files changed, 6 insertions(+), 25 deletions(-)

diff --git a/arch/arm/include/asm/topology.h b/arch/arm/include/asm/topology.h
index aee6c456c085..5e51fdcfcbd4 100644
--- a/arch/arm/include/asm/topology.h
+++ b/arch/arm/include/asm/topology.h
@@ -23,7 +23,6 @@
 
 /* Replace task scheduler's default thermal pressure API */
 #define arch_scale_thermal_pressure topology_get_thermal_pressure
-#define arch_set_thermal_pressure   topology_set_thermal_pressure
 #define arch_thermal_pressure_update	topology_thermal_pressure_update
 
 #else
diff --git a/arch/arm64/include/asm/topology.h b/arch/arm64/include/asm/topology.h
index c997015402bc..92cd1288906f 100644
--- a/arch/arm64/include/asm/topology.h
+++ b/arch/arm64/include/asm/topology.h
@@ -32,7 +32,6 @@ void update_freq_counters_refs(void);
 
 /* Replace task scheduler's default thermal pressure API */
 #define arch_scale_thermal_pressure topology_get_thermal_pressure
-#define arch_set_thermal_pressure   topology_set_thermal_pressure
 #define arch_thermal_pressure_update	topology_thermal_pressure_update
 
 #include <asm-generic/topology.h>
diff --git a/drivers/base/arch_topology.c b/drivers/base/arch_topology.c
index 1fa28b5afdb2..fa5ba3c7416c 100644
--- a/drivers/base/arch_topology.c
+++ b/drivers/base/arch_topology.c
@@ -159,16 +159,6 @@ void topology_set_cpu_scale(unsigned int cpu, unsigned long capacity)
 
 DEFINE_PER_CPU(unsigned long, thermal_pressure);
 
-void topology_set_thermal_pressure(const struct cpumask *cpus,
-			       unsigned long th_pressure)
-{
-	int cpu;
-
-	for_each_cpu(cpu, cpus)
-		WRITE_ONCE(per_cpu(thermal_pressure, cpu), th_pressure);
-}
-EXPORT_SYMBOL_GPL(topology_set_thermal_pressure);
-
 /**
  * topology_thermal_pressure_update() - Update thermal pressure for CPUs
  * @cpus	: The related CPUs for which capacity has been reduced
@@ -184,7 +174,7 @@ EXPORT_SYMBOL_GPL(topology_set_thermal_pressure);
 void topology_thermal_pressure_update(const struct cpumask *cpus,
 				      unsigned long capped_freq)
 {
-	unsigned long max_capacity, capacity;
+	unsigned long max_capacity, capacity, th_pressure;
 	int cpu;
 
 	if (!cpus)
@@ -199,7 +189,10 @@ void topology_thermal_pressure_update(const struct cpumask *cpus,
 	capacity = mult_frac(capped_freq, max_capacity,
 			     per_cpu(freq_factor, cpu));
 
-	arch_set_thermal_pressure(cpus, max_capacity - capacity);
+	th_pressure = max_capacity - capacity;
+
+	for_each_cpu(cpu, cpus)
+		WRITE_ONCE(per_cpu(thermal_pressure, cpu), th_pressure);
 }
 EXPORT_SYMBOL_GPL(topology_thermal_pressure_update);
 
diff --git a/include/linux/arch_topology.h b/include/linux/arch_topology.h
index 9e183621a59b..9b95e5b29ee9 100644
--- a/include/linux/arch_topology.h
+++ b/include/linux/arch_topology.h
@@ -56,9 +56,6 @@ static inline unsigned long topology_get_thermal_pressure(int cpu)
 	return per_cpu(thermal_pressure, cpu);
 }
 
-void topology_set_thermal_pressure(const struct cpumask *cpus,
-				   unsigned long th_pressure);
-
 void topology_thermal_pressure_update(const struct cpumask *cpus,
 				      unsigned long capped_freq);
 
diff --git a/include/linux/sched/topology.h b/include/linux/sched/topology.h
index 990d14814427..f31da5454baa 100644
--- a/include/linux/sched/topology.h
+++ b/include/linux/sched/topology.h
@@ -259,13 +259,6 @@ unsigned long arch_scale_thermal_pressure(int cpu)
 }
 #endif
 
-#ifndef arch_set_thermal_pressure
-static __always_inline
-void arch_set_thermal_pressure(const struct cpumask *cpus,
-			       unsigned long th_pressure)
-{ }
-#endif
-
 #ifndef arch_thermal_pressure_update
 static __always_inline
 void arch_thermal_pressure_update(const struct cpumask *cpus,
diff --git a/init/Kconfig b/init/Kconfig
index f494e405c156..334c302e588f 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -559,7 +559,7 @@ config SCHED_THERMAL_PRESSURE
 	  i.e. put less load on throttled CPUs than on non/less throttled ones.
 
 	  This requires the architecture to implement
-	  arch_set_thermal_pressure() and arch_scale_thermal_pressure().
+	  arch_thermal_pressure_update() and arch_scale_thermal_pressure().
 
 config BSD_PROCESS_ACCT
 	bool "BSD Process Accounting"
-- 
2.17.1