linux-kernel - [GIT PULL] timers fix

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Message-ID: <ZRkzAN0rpNWCarZf@gmail.com>
Date:   Sun, 1 Oct 2023 10:51:12 +0200
From:   Ingo Molnar <mingo@...nel.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Frederic Weisbecker <frederic@...nel.org>
Subject: [GIT PULL] timers fix

Linus,

Please pull the latest timers/urgent git tree from:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git timers-urgent-2023-10-01

   # HEAD: 1a6a464774947920dcedcf7409be62495c7cedd0 timers: Tag (hr)timer softirq as hotplug safe

Fix a spurious kernel warning during CPU hotplug events that
may trigger when timer/hrtimer softirqs are pending, which
are otherwise hotplug-safe and don't merit a warning.

 Thanks,

	Ingo

------------------>
Frederic Weisbecker (1):
      timers: Tag (hr)timer softirq as hotplug safe


 include/linux/interrupt.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
index a92bce40b04b..4a1dc88ddbff 100644
--- a/include/linux/interrupt.h
+++ b/include/linux/interrupt.h
@@ -569,8 +569,12 @@ enum
  * 	2) rcu_report_dead() reports the final quiescent states.
  *
  * _ IRQ_POLL: irq_poll_cpu_dead() migrates the queue
+ *
+ * _ (HR)TIMER_SOFTIRQ: (hr)timers_dead_cpu() migrates the queue
  */
-#define SOFTIRQ_HOTPLUG_SAFE_MASK (BIT(RCU_SOFTIRQ) | BIT(IRQ_POLL_SOFTIRQ))
+#define SOFTIRQ_HOTPLUG_SAFE_MASK (BIT(TIMER_SOFTIRQ) | BIT(IRQ_POLL_SOFTIRQ) |\
+				   BIT(HRTIMER_SOFTIRQ) | BIT(RCU_SOFTIRQ))
+
 
 /* map softirq index to softirq name. update 'softirq_to_name' in
  * kernel/softirq.c when adding a new softirq.