From: Viresh Kumar <viresh.kumar@linaro.org>
Date: Thu, 10 Dec 2020 05:47:40 +0000 (+0530)
Subject: arm64: topology: Drop the useless update to per-cpu cycles
X-Git-Tag: accepted/tizen/unified/20230118.172025~8220^2~3
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=51550a483606e35c379f78d28a7827f50e8fc09c;p=platform%2Fkernel%2Flinux-rpi.git

arm64: topology: Drop the useless update to per-cpu cycles

The previous call to update_freq_counters_refs() has already updated the
per-cpu variables, don't overwrite them with the same value again.

Fixes: 4b9cf23c179a ("arm64: wrap and generalise counter read functions")
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Ionela Voinescu <ionela.voinescu@arm.com>
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Link: https://lore.kernel.org/r/7a171f710cdc0f808a2bfbd7db839c0d265527e7.1607579234.git.viresh.kumar@linaro.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---

diff --git a/arch/arm64/kernel/topology.c b/arch/arm64/kernel/topology.c
index b8026ec6..aebeb6f 100644
--- a/arch/arm64/kernel/topology.c
+++ b/arch/arm64/kernel/topology.c
@@ -304,7 +304,7 @@ void topology_scale_freq_tick(void)
 
 	if (unlikely(core_cnt <= prev_core_cnt ||
 		     const_cnt <= prev_const_cnt))
-		goto store_and_exit;
+		return;
 
 	/*
 	 *	    /\core    arch_max_freq_scale
@@ -321,10 +321,6 @@ void topology_scale_freq_tick(void)
 
 	scale = min_t(unsigned long, scale, SCHED_CAPACITY_SCALE);
 	this_cpu_write(freq_scale, (unsigned long)scale);
-
-store_and_exit:
-	this_cpu_write(arch_core_cycles_prev, core_cnt);
-	this_cpu_write(arch_const_cycles_prev, const_cnt);
 }
 
 #ifdef CONFIG_ACPI_CPPC_LIB