linux kernel: update to 4.9.144 based fslc

Update to L4.9.123-2.3.0_8mm_ga release.

Update to branch toradex_4.9-2.3.x-imx based on 4.9-2.3.x-imx branch of
linux-fslc currently re-based to 4.9.144.

Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Acked-by: Philippe Schenker <philippe.schenker@toradex.com>

1 files changed, 114 insertions, 0 deletions

diff --git a/recipes-kernel/linux/linux-toradex-rt-4.9-2.3.x/002i.patch b/recipes-kernel/linux/linux-toradex-rt-4.9-2.3.x/002i.patch
new file mode 100644
index 0000000..0733908
--- /dev/null
+++ b/recipes-kernel/linux/linux-toradex-rt-4.9-2.3.x/002i.patch
@@ -0,0 +1,114 @@
+--- b/kernel/cpu.c
++++ a/kernel/cpu.c
+@@ -54,7 +54,6 @@
+ 	bool			rollback;
+ 	bool			single;
+ 	bool			bringup;
+-	bool			booted_once;
+ 	struct hlist_node	*node;
+ 	enum cpuhp_state	cb_state;
+ 	int			result;
+@@ -356,40 +355,6 @@
+ EXPORT_SYMBOL_GPL(cpu_hotplug_enable);
+ #endif	/* CONFIG_HOTPLUG_CPU */
+ 
+-#ifdef CONFIG_HOTPLUG_SMT
+-enum cpuhp_smt_control cpu_smt_control __read_mostly = CPU_SMT_ENABLED;
+-
+-static int __init smt_cmdline_disable(char *str)
+-{
+-	cpu_smt_control = CPU_SMT_DISABLED;
+-	if (str && !strcmp(str, "force")) {
+-		pr_info("SMT: Force disabled\n");
+-		cpu_smt_control = CPU_SMT_FORCE_DISABLED;
+-	}
+-	return 0;
+-}
+-early_param("nosmt", smt_cmdline_disable);
+-
+-static inline bool cpu_smt_allowed(unsigned int cpu)
+-{
+-	if (cpu_smt_control == CPU_SMT_ENABLED)
+-		return true;
+-
+-	if (topology_is_primary_thread(cpu))
+-		return true;
+-
+-	/*
+-	 * On x86 it's required to boot all logical CPUs at least once so
+-	 * that the init code can get a chance to set CR4.MCE on each
+-	 * CPU. Otherwise, a broadacasted MCE observing CR4.MCE=0b on any
+-	 * core will shutdown the machine.
+-	 */
+-	return !per_cpu(cpuhp_state, cpu).booted_once;
+-}
+-#else
+-static inline bool cpu_smt_allowed(unsigned int cpu) { return true; }
+-#endif
+-
+ /* Need to know about CPUs going up/down? */
+ int register_cpu_notifier(struct notifier_block *nb)
+ {
+@@ -466,16 +431,6 @@
+ 	stop_machine_unpark(cpu);
+ 	kthread_unpark(st->thread);
+ 
+-	/*
+-	 * SMT soft disabling on X86 requires to bring the CPU out of the
+-	 * BIOS 'wait for SIPI' state in order to set the CR4.MCE bit.  The
+-	 * CPU marked itself as booted_once in cpu_notify_starting() so the
+-	 * cpu_smt_allowed() check will now return false if this is not the
+-	 * primary sibling.
+-	 */
+-	if (!cpu_smt_allowed(cpu))
+-		return -ECANCELED;
+-
+ 	/* Should we go further up ? */
+ 	if (st->target > CPUHP_AP_ONLINE_IDLE) {
+ 		__cpuhp_kick_ap_work(st);
+@@ -1023,6 +978,29 @@
+ EXPORT_SYMBOL(cpu_down);
+ #endif /*CONFIG_HOTPLUG_CPU*/
+ 
++#ifdef CONFIG_HOTPLUG_SMT
++enum cpuhp_smt_control cpu_smt_control __read_mostly = CPU_SMT_ENABLED;
++
++static int __init smt_cmdline_disable(char *str)
++{
++	cpu_smt_control = CPU_SMT_DISABLED;
++	if (str && !strcmp(str, "force")) {
++		pr_info("SMT: Force disabled\n");
++		cpu_smt_control = CPU_SMT_FORCE_DISABLED;
++	}
++	return 0;
++}
++early_param("nosmt", smt_cmdline_disable);
++
++static inline bool cpu_smt_allowed(unsigned int cpu)
++{
++	return cpu_smt_control == CPU_SMT_ENABLED ||
++		topology_is_primary_thread(cpu);
++}
++#else
++static inline bool cpu_smt_allowed(unsigned int cpu) { return true; }
++#endif
++
+ /**
+  * notify_cpu_starting(cpu) - Invoke the callbacks on the starting CPU
+  * @cpu: cpu that just started
+@@ -1036,7 +1014,6 @@
+ 	enum cpuhp_state target = min((int)st->target, CPUHP_AP_ONLINE);
+ 
+ 	rcu_cpu_starting(cpu);	/* Enables RCU usage on this CPU. */
+-	st->booted_once = true;
+ 	while (st->state < target) {
+ 		st->state++;
+ 		cpuhp_invoke_callback(cpu, st->state, true, NULL);
+@@ -2137,6 +2114,5 @@
+  */
+ void __init boot_cpu_hotplug_init(void)
+ {
++	per_cpu_ptr(&cpuhp_state, smp_processor_id())->state = CPUHP_ONLINE;
+-	this_cpu_write(cpuhp_state.booted_once, true);
+-	this_cpu_write(cpuhp_state.state, CPUHP_ONLINE);
+ }