linux-kernel - [PATCH tip/core/rcu 09/17] torture: Make stutter use torture_hrtimeout

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Date:   Wed,  6 Jan 2021 09:17:02 -0800
From:   paulmck@...nel.org
To:     rcu@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, kernel-team@...com, mingo@...nel.org,
        jiangshanlai@...il.com, akpm@...ux-foundation.org,
        mathieu.desnoyers@...icios.com, josh@...htriplett.org,
        tglx@...utronix.de, peterz@...radead.org, rostedt@...dmis.org,
        dhowells@...hat.com, edumazet@...gle.com, fweisbec@...il.com,
        oleg@...hat.com, joel@...lfernandes.org,
        "Paul E. McKenney" <paulmck@...nel.org>
Subject: [PATCH tip/core/rcu 09/17] torture: Make stutter use torture_hrtimeout_*() functions

From: "Paul E. McKenney" <paulmck@...nel.org>

This commit saves a few lines of code by making the stutter_wait()
and torture_stutter() functions use torture_hrtimeout_jiffies() and
torture_hrtimeout_us().

Signed-off-by: Paul E. McKenney <paulmck@...nel.org>
---
 kernel/torture.c | 20 +++++---------------
 1 file changed, 5 insertions(+), 15 deletions(-)

diff --git a/kernel/torture.c b/kernel/torture.c
index 7548634..7ad5c96 100644
--- a/kernel/torture.c
+++ b/kernel/torture.c
@@ -677,7 +677,6 @@ static int stutter_gap;
  */
 bool stutter_wait(const char *title)
 {
-	ktime_t delay;
 	unsigned int i = 0;
 	bool ret = false;
 	int spt;
@@ -693,11 +692,8 @@ bool stutter_wait(const char *title)
 			schedule_timeout_interruptible(1);
 		} else if (spt == 2) {
 			while (READ_ONCE(stutter_pause_test)) {
-				if (!(i++ & 0xffff)) {
-					set_current_state(TASK_INTERRUPTIBLE);
-					delay = 10 * NSEC_PER_USEC;
-					schedule_hrtimeout(&delay, HRTIMER_MODE_REL);
-				}
+				if (!(i++ & 0xffff))
+					torture_hrtimeout_us(10, 0, NULL);
 				cond_resched();
 			}
 		} else {
@@ -715,7 +711,6 @@ EXPORT_SYMBOL_GPL(stutter_wait);
  */
 static int torture_stutter(void *arg)
 {
-	ktime_t delay;
 	DEFINE_TORTURE_RANDOM(rand);
 	int wtime;
 
@@ -726,20 +721,15 @@ static int torture_stutter(void *arg)
 			if (stutter > 2) {
 				WRITE_ONCE(stutter_pause_test, 1);
 				wtime = stutter - 3;
-				delay = ktime_divns(NSEC_PER_SEC * wtime, HZ);
-				delay += (torture_random(&rand) >> 3) % NSEC_PER_MSEC;
-				set_current_state(TASK_INTERRUPTIBLE);
-				schedule_hrtimeout(&delay, HRTIMER_MODE_REL);
+				torture_hrtimeout_jiffies(wtime, &rand);
 				wtime = 2;
 			}
 			WRITE_ONCE(stutter_pause_test, 2);
-			delay = ktime_divns(NSEC_PER_SEC * wtime, HZ);
-			set_current_state(TASK_INTERRUPTIBLE);
-			schedule_hrtimeout(&delay, HRTIMER_MODE_REL);
+			torture_hrtimeout_jiffies(wtime, NULL);
 		}
 		WRITE_ONCE(stutter_pause_test, 0);
 		if (!torture_must_stop())
-			schedule_timeout_interruptible(stutter_gap);
+			torture_hrtimeout_jiffies(stutter_gap, NULL);
 		torture_shutdown_absorb("torture_stutter");
 	} while (!torture_must_stop());
 	torture_kthread_stopping("torture_stutter");
-- 
2.9.5