Merge efdfcd40ad ("Merge tag 'lkmm.2024.09.14b' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu") into android-mainline

Steps on the way to 6.12-rc1

Bug: 367265496
Change-Id: I0a0d83175270f57ba857b91e7c1c403e939fa34f
Signed-off-by: Matthias Maennich <maennich@google.com>

Documentation/admin-guide/kernel-parameters.txt

@@ -4973,6 +4973,10 @@
 			Set maximum number of finished RCU callbacks to
 			process in one batch.
 
+	rcutree.csd_lock_suppress_rcu_stall=	[KNL]
+			Do only a one-line RCU CPU stall warning when
+			there is an ongoing too-long CSD-lock wait.
+
 	rcutree.do_rcu_barrier=	[KNL]
 			Request a call to rcu_barrier().  This is
 			throttled so that userspace tests can safely
@@ -5420,7 +5424,13 @@
 			Time to wait (s) after boot before inducing stall.
 
 	rcutorture.stall_cpu_irqsoff= [KNL]
-			Disable interrupts while stalling if set.
+			Disable interrupts while stalling if set, but only
+			on the first stall in the set.
+
+	rcutorture.stall_cpu_repeat= [KNL]
+			Number of times to repeat the stall sequence,
+			so that rcutorture.stall_cpu_repeat=3 will result
+			in four stall sequences.
 
 	rcutorture.stall_gp_kthread= [KNL]
 			Duration (s) of forced sleep within RCU
@@ -5623,14 +5633,6 @@
 			of zero will disable batching.	Batching is
 			always disabled for synchronize_rcu_tasks().
 
-	rcupdate.rcu_tasks_rude_lazy_ms= [KNL]
-			Set timeout in milliseconds RCU Tasks
-			Rude asynchronous callback batching for
-			call_rcu_tasks_rude().	A negative value
-			will take the default.	A value of zero will
-			disable batching.  Batching is always disabled
-			for synchronize_rcu_tasks_rude().
-
 	rcupdate.rcu_tasks_trace_lazy_ms= [KNL]
 			Set timeout in milliseconds RCU Tasks
 			Trace asynchronous callback batching for
@@ -7405,6 +7407,13 @@
 			it can be updated at runtime by writing to the
 			corresponding sysfs file.
 
+	workqueue.panic_on_stall=<uint>
+			Panic when workqueue stall is detected by
+			CONFIG_WQ_WATCHDOG. It sets the number times of the
+			stall to trigger panic.
+
+			The default is 0, which disables the panic on stall.
+
 	workqueue.cpu_intensive_thresh_us=
 			Per-cpu work items which run for longer than this
 			threshold are automatically considered CPU intensive