linux-kernel - [PATCH] tick: Remove unnused tick_nohz_get_idle

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Date: Mon, 17 Jun 2024 17:16:15 +0100
From: Christian Loehle <christian.loehle@....com>
To: linux-kernel@...r.kernel.org,
	anna-maria@...utronix.de
Cc: frederic@...nel.org,
	tglx@...utronix.de,
	Christian Loehle <christian.loehle@....com>
Subject: [PATCH] tick: Remove unnused tick_nohz_get_idle_calls()

The function returns the idle calls counter for the current cpu and
therefore usually isn't what the caller wants. It is unnused since
commit 466a2b42d676 ("cpufreq: schedutil: Use idle_calls counter of the
remote CPU")

Signed-off-by: Christian Loehle <christian.loehle@....com>
---
 include/linux/tick.h     |  1 -
 kernel/time/tick-sched.c | 14 --------------
 2 files changed, 15 deletions(-)

diff --git a/include/linux/tick.h b/include/linux/tick.h
index 4924a33700b7..72744638c5b0 100644
--- a/include/linux/tick.h
+++ b/include/linux/tick.h
@@ -139,7 +139,6 @@ extern void tick_nohz_irq_exit(void);
 extern bool tick_nohz_idle_got_tick(void);
 extern ktime_t tick_nohz_get_next_hrtimer(void);
 extern ktime_t tick_nohz_get_sleep_length(ktime_t *delta_next);
-extern unsigned long tick_nohz_get_idle_calls(void);
 extern unsigned long tick_nohz_get_idle_calls_cpu(int cpu);
 extern u64 get_cpu_idle_time_us(int cpu, u64 *last_update_time);
 extern u64 get_cpu_iowait_time_us(int cpu, u64 *last_update_time);
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index 71a792cd8936..43a6370a2ebc 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -1385,20 +1385,6 @@ unsigned long tick_nohz_get_idle_calls_cpu(int cpu)
 	return ts->idle_calls;
 }
 
-/**
- * tick_nohz_get_idle_calls - return the current idle calls counter value
- *
- * Called from the schedutil frequency scaling governor in scheduler context.
- *
- * Return: the current idle calls counter value for the current CPU
- */
-unsigned long tick_nohz_get_idle_calls(void)
-{
-	struct tick_sched *ts = this_cpu_ptr(&tick_cpu_sched);
-
-	return ts->idle_calls;
-}
-
 static void tick_nohz_account_idle_time(struct tick_sched *ts,
 					ktime_t now)
 {
-- 
2.34.1