linux58-rc-tkg: RC4

linux58-rc-tkg/linux58-tkg-patches/0005-v5.8_undead-pds099o.patch

@@ -6723,14 +6723,14 @@ index 000000000000..02d7d5a67c77
 +{
 +	struct mm_struct *mm = current->active_mm;
 +
-+	BUG_ON(cpu_online(smp_processor_id()));
++	BUG_ON(current != this_rq()->idle);
 +
 +	if (mm != &init_mm) {
 +		switch_mm(mm, &init_mm, current);
-+		current->active_mm = &init_mm;
 +		finish_arch_post_lock_switch();
 +	}
-+	mmdrop(mm);
++
++	/* finish_cpu(), as ran on the BP, will clean up the active_mm state */
 +}
 +
 +/*
@@ -8524,19 +8524,3 @@ index b5e3496cf803..0816db0b9c16 100644
  	};
  	struct wakeup_test_data *x = data;
  
-diff --git a/kernel/cpu.c b/kernel/cpu.c
-index 244d305443773..90b77028233b0 100644
---- a/kernel/cpu.c
-+++ b/kernel/cpu.c
-@@ -1565,7 +1565,11 @@ static struct cpuhp_step cpuhp_hp_states[] = {
- 	[CPUHP_BRINGUP_CPU] = {
- 		.name			= "cpu:bringup",
- 		.startup.single		= bringup_cpu,
-+#ifdef CONFIG_SCHED_PDS
-+		.teardown.single	= NULL,
-+#else
- 		.teardown.single	= finish_cpu,
-+#endif
- 		.cant_stop		= true,
- 	},
- 	/* Final state before CPU kills itself */