Linux 6.12.3

Linux 6.12.3

[Greg Kroah-Hartman]

I'm announcing the release of the 6.12.3 kernel.

All users of the 6.12 kernel series must upgrade.

The updated 6.12.y git tree can be found at:
	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git linux-6.12.y
and can be browsed at the normal kernel.org git web browser:
	https://git.kernel.org/?p=linux/kernel/git/stable/linux-stable.git;a=summary

thanks,

greg k-h

------------

 Makefile            |    2 +-
 kernel/sched/core.c |   12 +++++-------
 2 files changed, 6 insertions(+), 8 deletions(-)

Greg Kroah-Hartman (1):
      Linux 6.12.3

Thomas Gleixner (1):
      sched: Initialize idle tasks only once

Re: Linux 6.12.3

[Greg Kroah-Hartman]

diff --git a/Makefile b/Makefile
index da6e99309a4d..e81030ec6831 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 VERSION = 6
 PATCHLEVEL = 12
-SUBLEVEL = 2
+SUBLEVEL = 3
 EXTRAVERSION =
 NAME = Baby Opossum Posse
 
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index a1c353a62c56..76b27b2a9c56 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -4424,7 +4424,8 @@ int wake_up_state(struct task_struct *p, unsigned int state)
  * Perform scheduler related setup for a newly forked process p.
  * p is forked by current.
  *
- * __sched_fork() is basic setup used by init_idle() too:
+ * __sched_fork() is basic setup which is also used by sched_init() to
+ * initialize the boot CPU's idle task.
  */
 static void __sched_fork(unsigned long clone_flags, struct task_struct *p)
 {
@@ -7683,8 +7684,6 @@ void __init init_idle(struct task_struct *idle, int cpu)
 	struct rq *rq = cpu_rq(cpu);
 	unsigned long flags;
 
-	__sched_fork(0, idle);
-
 	raw_spin_lock_irqsave(&idle->pi_lock, flags);
 	raw_spin_rq_lock(rq);
 
@@ -7699,10 +7698,8 @@ void __init init_idle(struct task_struct *idle, int cpu)
 
 #ifdef CONFIG_SMP
 	/*
-	 * It's possible that init_idle() gets called multiple times on a task,
-	 * in that case do_set_cpus_allowed() will not do the right thing.
-	 *
-	 * And since this is boot we can forgo the serialization.
+	 * No validation and serialization required at boot time and for
+	 * setting up the idle tasks of not yet online CPUs.
 	 */
 	set_cpus_allowed_common(idle, &ac);
 #endif
@@ -8546,6 +8543,7 @@ void __init sched_init(void)
 	 * but because we are the idle thread, we just pick up running again
 	 * when this runqueue becomes "idle".
 	 */
+	__sched_fork(0, current);
 	init_idle(current, smp_processor_id());
 
 	calc_load_update = jiffies + LOAD_FREQ;