2 files changed, 20 insertions, 3 deletions

diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index 27f4332c7f84..ae216824e8ca 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -985,6 +985,23 @@ int irq_chip_set_affinity_parent(struct irq_data *data,
 }
 
 /**
+ * irq_chip_set_type_parent - Set IRQ type on the parent interrupt
+ * @data:       Pointer to interrupt specific data
+ * @type:       IRQ_TYPE_{LEVEL,EDGE}_* value - see include/linux/irq.h
+ *
+ * Conditional, as the underlying parent chip might not implement it.
+ */
+int irq_chip_set_type_parent(struct irq_data *data, unsigned int type)
+{
+        data = data->parent_data;
+
+        if (data->chip->irq_set_type)
+                return data->chip->irq_set_type(data, type);
+
+        return -ENOSYS;
+}
+
+/**
  * irq_chip_retrigger_hierarchy - Retrigger an interrupt in hardware
  * @data:       Pointer to interrupt specific data
  *
@@ -997,7 +1014,7 @@ int irq_chip_retrigger_hierarchy(struct irq_data *data)
                 if (data->chip && data->chip->irq_retrigger)
                         return data->chip->irq_retrigger(data);
 
-        return -ENOSYS;
+        return 0;
 }
 
 /**
diff --git a/kernel/time/timer.c b/kernel/time/timer.c
index 5e097fa9faf7..84190f02b521 100644
--- a/kernel/time/timer.c
+++ b/kernel/time/timer.c
@@ -807,8 +807,8 @@ __mod_timer(struct timer_list *timer, unsigned long expires,
                         spin_unlock(&base->lock);
                         base = new_base;
                         spin_lock(&base->lock);
-                        timer->flags &= ~TIMER_BASEMASK;
-                        timer->flags |= base->cpu;
+                        WRITE_ONCE(timer->flags,
+                                   (timer->flags & ~TIMER_BASEMASK) | base->cpu);
                 }
         }