linux-kernel - [PATCH 30/31] null_blk: Switch to use hrtimer

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Message-Id: <d9d3bbed4ff7dbc6b3310f6c5a76acdc93a87696.1729864823.git.namcao@linutronix.de>
Date: Mon, 28 Oct 2024 08:32:03 +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>,
	Jens Axboe <axboe@...nel.dk>
Subject: [PATCH 30/31] null_blk: 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: Jens Axboe <axboe@...nel.dk>
---
 drivers/block/null_blk/main.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/block/null_blk/main.c b/drivers/block/null_blk/main.c
index 2f0431e42c49..b815b26b39d2 100644
--- a/drivers/block/null_blk/main.c
+++ b/drivers/block/null_blk/main.c
@@ -1418,8 +1418,7 @@ static void nullb_setup_bwtimer(struct nullb *nullb)
 {
 	ktime_t timer_interval = ktime_set(0, TIMER_INTERVAL);
 
-	hrtimer_init(&nullb->bw_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
-	nullb->bw_timer.function = nullb_bwtimer_fn;
+	hrtimer_setup(&nullb->bw_timer, nullb_bwtimer_fn, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
 	atomic_long_set(&nullb->cur_bytes, mb_per_tick(nullb->dev->mbps));
 	hrtimer_start(&nullb->bw_timer, timer_interval, HRTIMER_MODE_REL);
 }
@@ -1596,8 +1595,8 @@ static blk_status_t null_queue_rq(struct blk_mq_hw_ctx *hctx,
 	might_sleep_if(hctx->flags & BLK_MQ_F_BLOCKING);
 
 	if (!is_poll && nq->dev->irqmode == NULL_IRQ_TIMER) {
-		hrtimer_init(&cmd->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
-		cmd->timer.function = null_cmd_timer_expired;
+		hrtimer_setup(&cmd->timer, null_cmd_timer_expired, CLOCK_MONOTONIC,
+			      HRTIMER_MODE_REL);
 	}
 	cmd->error = BLK_STS_OK;
 	cmd->nq = nq;
-- 
2.39.5