linux-kernel - [tip: sched/core] cpuidle: Use local_clock

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Date:   Mon, 05 Jun 2023 19:16:15 -0000
From:   "tip-bot2 for Peter Zijlstra" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Michael Kelley <mikelley@...rosoft.com>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: sched/core] cpuidle: Use local_clock_noinstr()

The following commit has been merged into the sched/core branch of tip:

Commit-ID:     e6a15fa9ea8372ad4db973191233f743ae1081d5
Gitweb:        https://git.kernel.org/tip/e6a15fa9ea8372ad4db973191233f743ae1081d5
Author:        Peter Zijlstra <peterz@...radead.org>
AuthorDate:    Fri, 19 May 2023 12:21:11 +02:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Mon, 05 Jun 2023 21:11:09 +02:00

cpuidle: Use local_clock_noinstr()

With the introduction of local_clock_noinstr(), local_clock() itself
is no longer marked noinstr, use the correct function.

Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Acked-by: Rafael J. Wysocki <rafael@...nel.org>
Tested-by: Michael Kelley <mikelley@...rosoft.com>  # Hyper-V
Link: https://lore.kernel.org/r/20230519102716.045980863@infradead.org
---
 drivers/cpuidle/cpuidle.c    | 8 ++++----
 drivers/cpuidle/poll_state.c | 4 ++--
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index 8e929f6..737a026 100644
--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -145,7 +145,7 @@ static noinstr void enter_s2idle_proper(struct cpuidle_driver *drv,
 
 	instrumentation_begin();
 
-	time_start = ns_to_ktime(local_clock());
+	time_start = ns_to_ktime(local_clock_noinstr());
 
 	tick_freeze();
 	/*
@@ -169,7 +169,7 @@ static noinstr void enter_s2idle_proper(struct cpuidle_driver *drv,
 	tick_unfreeze();
 	start_critical_timings();
 
-	time_end = ns_to_ktime(local_clock());
+	time_end = ns_to_ktime(local_clock_noinstr());
 
 	dev->states_usage[index].s2idle_time += ktime_us_delta(time_end, time_start);
 	dev->states_usage[index].s2idle_usage++;
@@ -243,7 +243,7 @@ noinstr int cpuidle_enter_state(struct cpuidle_device *dev,
 	sched_idle_set_state(target_state);
 
 	trace_cpu_idle(index, dev->cpu);
-	time_start = ns_to_ktime(local_clock());
+	time_start = ns_to_ktime(local_clock_noinstr());
 
 	stop_critical_timings();
 	if (!(target_state->flags & CPUIDLE_FLAG_RCU_IDLE)) {
@@ -276,7 +276,7 @@ noinstr int cpuidle_enter_state(struct cpuidle_device *dev,
 	start_critical_timings();
 
 	sched_clock_idle_wakeup_event();
-	time_end = ns_to_ktime(local_clock());
+	time_end = ns_to_ktime(local_clock_noinstr());
 	trace_cpu_idle(PWR_EVENT_EXIT, dev->cpu);
 
 	/* The cpu is no longer idle or about to enter idle. */
diff --git a/drivers/cpuidle/poll_state.c b/drivers/cpuidle/poll_state.c
index bdcfeae..9b6d90a 100644
--- a/drivers/cpuidle/poll_state.c
+++ b/drivers/cpuidle/poll_state.c
@@ -15,7 +15,7 @@ static int __cpuidle poll_idle(struct cpuidle_device *dev,
 {
 	u64 time_start;
 
-	time_start = local_clock();
+	time_start = local_clock_noinstr();
 
 	dev->poll_time_limit = false;
 
@@ -32,7 +32,7 @@ static int __cpuidle poll_idle(struct cpuidle_device *dev,
 				continue;
 
 			loop_count = 0;
-			if (local_clock() - time_start > limit) {
+			if (local_clock_noinstr() - time_start > limit) {
 				dev->poll_time_limit = true;
 				break;
 			}