linux-kernel - [tip: irq/core] timers: Use __raise_softirq

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Message-ID: <173094413383.32228.15495402388906189523.tip-bot2@tip-bot2>
Date: Thu, 07 Nov 2024 01:48:53 -0000
From: "tip-bot2 for Sebastian Andrzej Siewior" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
 Thomas Gleixner <tglx@...utronix.de>,
 Frederic Weisbecker <frederic@...nel.org>, x86@...nel.org,
 linux-kernel@...r.kernel.org, maz@...nel.org
Subject:
 [tip: irq/core] timers: Use __raise_softirq_irqoff() to raise the softirq.

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

Commit-ID:     a02976cfce4fe8336c6be08cd4dc35ca1aa794e9
Gitweb:        https://git.kernel.org/tip/a02976cfce4fe8336c6be08cd4dc35ca1aa794e9
Author:        Sebastian Andrzej Siewior <bigeasy@...utronix.de>
AuthorDate:    Wed, 06 Nov 2024 15:51:38 +01:00
Committer:     Thomas Gleixner <tglx@...utronix.de>
CommitterDate: Thu, 07 Nov 2024 02:44:38 +01:00

timers: Use __raise_softirq_irqoff() to raise the softirq.

Raising the timer soft interrupt is always done from hard interrupt
context, so it can be reduced to just setting the TIMER soft interrupt
flag. The soft interrupt will be invoked on return from interrupt.

Use therefore __raise_softirq_irqoff() to raise the TIMER soft interrupt,
which is a trivial optimization.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Reviewed-by: Frederic Weisbecker <frederic@...nel.org>
Link: https://lore.kernel.org/all/20241106150419.2593080-3-bigeasy@linutronix.de

---
 kernel/time/timer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/time/timer.c b/kernel/time/timer.c
index 0fc9d06..1759de9 100644
--- a/kernel/time/timer.c
+++ b/kernel/time/timer.c
@@ -2499,7 +2499,7 @@ static void run_local_timers(void)
 		 */
 		if (time_after_eq(jiffies, READ_ONCE(base->next_expiry)) ||
 		    (i == BASE_DEF && tmigr_requires_handle_remote())) {
-			raise_softirq(TIMER_SOFTIRQ);
+			__raise_softirq_irqoff(TIMER_SOFTIRQ);
 			return;
 		}
 	}