linux-kernel - [PATCH 18/31] perf: Switch to use hrtimer

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Message-Id: <432209f20747fba448f80a10b5cc776536ac490b.1729864823.git.namcao@linutronix.de>
Date: Mon, 28 Oct 2024 08:31:51 +0100
From: Nam Cao <namcao@...utronix.de>
To: Anna-Maria Behnsen <anna-maria@...utronix.de>,
	Frederic Weisbecker <frederic@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andreas Hindborg <a.hindborg@...nel.org>,
	Alice Ryhl <aliceryhl@...gle.com>,
	Miguel Ojeda <ojeda@...nel.org>,
	Kees Cook <kees@...nel.org>,
	linux-kernel@...r.kernel.org
Cc: Nam Cao <namcao@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>
Subject: [PATCH 18/31] perf: Switch to use hrtimer_setup()

There is a newly introduced hrtimer_setup() which will replace
hrtimer_init(). This new function is similar to the old one, except that it
also sanity-checks and initializes the timer's callback function.

Switch to use this new function.

Patch was created by using Coccinelle.

Signed-off-by: Nam Cao <namcao@...utronix.de>
---
Cc: Peter Zijlstra <peterz@...radead.org>
---
 kernel/events/core.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/kernel/events/core.c b/kernel/events/core.c
index e3589c4287cb..a4d0d7b0311f 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -1151,8 +1151,8 @@ static void __perf_mux_hrtimer_init(struct perf_cpu_pmu_context *cpc, int cpu)
 	cpc->hrtimer_interval = ns_to_ktime(NSEC_PER_MSEC * interval);
 
 	raw_spin_lock_init(&cpc->hrtimer_lock);
-	hrtimer_init(timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS_PINNED_HARD);
-	timer->function = perf_mux_hrtimer_handler;
+	hrtimer_setup(timer, perf_mux_hrtimer_handler, CLOCK_MONOTONIC,
+		      HRTIMER_MODE_ABS_PINNED_HARD);
 }
 
 static int perf_mux_hrtimer_restart(struct perf_cpu_pmu_context *cpc)
@@ -11273,8 +11273,7 @@ static void perf_swevent_init_hrtimer(struct perf_event *event)
 	if (!is_sampling_event(event))
 		return;
 
-	hrtimer_init(&hwc->hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL_HARD);
-	hwc->hrtimer.function = perf_swevent_hrtimer;
+	hrtimer_setup(&hwc->hrtimer, perf_swevent_hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL_HARD);
 
 	/*
 	 * Since hrtimers have a fixed rate, we can do a static freq->period
-- 
2.39.5