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From: "Rafael J. Wysocki" <rjw@rjwysocki.net>
To: Linux PM <linux-pm@vger.kernel.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
	Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Daniel Lezcano <daniel.lezcano@linaro.org>,
	Doug Smythies <dsmythies@telus.net>
Subject: [PATCH 2/4] cpuidle: teo: Rename local variable in teo_select()
Date: Thu, 10 Oct 2019 23:32:59 +0200	[thread overview]
Message-ID: <5976014.dk64zBpnPU@kreacher> (raw)
In-Reply-To: <60416800.X4hXmAfbqi@kreacher>

From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Rename a local variable in teo_select() in preparation for subsequent
code modifications, no intentional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/cpuidle/governors/teo.c |   19 +++++++++----------
 1 file changed, 9 insertions(+), 10 deletions(-)

Index: linux-pm/drivers/cpuidle/governors/teo.c
===================================================================
--- linux-pm.orig/drivers/cpuidle/governors/teo.c
+++ linux-pm/drivers/cpuidle/governors/teo.c
@@ -233,7 +233,7 @@ static int teo_select(struct cpuidle_dri
 {
 	struct teo_cpu *cpu_data = per_cpu_ptr(&teo_cpus, dev->cpu);
 	int latency_req = cpuidle_governor_latency_req(dev->cpu);
-	unsigned int duration_us, count;
+	unsigned int duration_us, early_hits;
 	int max_early_idx, constraint_idx, idx, i;
 	ktime_t delta_tick;
 
@@ -247,7 +247,7 @@ static int teo_select(struct cpuidle_dri
 	cpu_data->sleep_length_ns = tick_nohz_get_sleep_length(&delta_tick);
 	duration_us = ktime_to_us(cpu_data->sleep_length_ns);
 
-	count = 0;
+	early_hits = 0;
 	max_early_idx = -1;
 	constraint_idx = drv->state_count;
 	idx = -1;
@@ -270,12 +270,12 @@ static int teo_select(struct cpuidle_dri
 			 * into account, because it would be a mistake to select
 			 * a deeper state with lower "early hits" metric.  The
 			 * index cannot be changed to point to it, however, so
-			 * just increase the max count alone and let the index
-			 * still point to a shallower idle state.
+			 * just increase the "early hits" count alone and let
+			 * the index still point to a shallower idle state.
 			 */
 			if (max_early_idx >= 0 &&
-			    count < cpu_data->states[i].early_hits)
-				count = cpu_data->states[i].early_hits;
+			    early_hits < cpu_data->states[i].early_hits)
+				early_hits = cpu_data->states[i].early_hits;
 
 			continue;
 		}
@@ -291,10 +291,10 @@ static int teo_select(struct cpuidle_dri
 
 		idx = i;
 
-		if (count < cpu_data->states[i].early_hits &&
+		if (early_hits < cpu_data->states[i].early_hits &&
 		    !(tick_nohz_tick_stopped() &&
 		      drv->states[i].target_residency < TICK_USEC)) {
-			count = cpu_data->states[i].early_hits;
+			early_hits = cpu_data->states[i].early_hits;
 			max_early_idx = i;
 		}
 	}
@@ -323,10 +323,9 @@ static int teo_select(struct cpuidle_dri
 	if (idx < 0) {
 		idx = 0; /* No states enabled. Must use 0. */
 	} else if (idx > 0) {
+		unsigned int count = 0;
 		u64 sum = 0;
 
-		count = 0;
-
 		/*
 		 * Count and sum the most recent idle duration values less than
 		 * the current expected idle duration value.




  parent reply	other threads:[~2019-10-10 21:34 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-10 21:30 [PATCH 0/4] cpuidle: teo: Fix issues related to disabled idle states Rafael J. Wysocki
2019-10-10 21:32 ` [PATCH 1/4] cpuidle: teo: Ignore disabled idle states that are too deep Rafael J. Wysocki
2019-11-05 19:50   ` Doug Smythies
2019-10-10 21:32 ` Rafael J. Wysocki [this message]
2019-11-05 19:50   ` [PATCH 2/4] cpuidle: teo: Rename local variable in teo_select() Doug Smythies
2019-10-10 21:36 ` [PATCH 3/4] cpuidle: teo: Consider hits and misses metrics of disabled states Rafael J. Wysocki
2019-11-05 19:50   ` Doug Smythies
2019-10-10 21:37 ` [PATCH 4/4] cpuidle: teo: Fix "early hits" handling for disabled idle states Rafael J. Wysocki
2019-11-05 19:50   ` Doug Smythies
2019-11-05 22:15     ` Rafael J. Wysocki
2019-10-18  7:21 ` [PATCH 0/4] cpuidle: teo: Fix issues related to " Doug Smythies

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