1 files changed, 15 insertions, 0 deletions

diff --git a/kernel/rcutree.c b/kernel/rcutree.c
index 6b82a9565149..d2e74c8d4b0e 100644
--- a/kernel/rcutree.c
+++ b/kernel/rcutree.c
@@ -717,6 +717,21 @@ int rcu_is_cpu_idle(void)
 }
 EXPORT_SYMBOL(rcu_is_cpu_idle);
 
+#ifdef CONFIG_RCU_USER_QS
+void rcu_user_hooks_switch(struct task_struct *prev,
+                           struct task_struct *next)
+{
+        struct rcu_dynticks *rdtp;
+
+        /* Interrupts are disabled in context switch */
+        rdtp = &__get_cpu_var(rcu_dynticks);
+        if (!rdtp->ignore_user_qs) {
+                clear_tsk_thread_flag(prev, TIF_NOHZ);
+                set_tsk_thread_flag(next, TIF_NOHZ);
+        }
+}
+#endif /* #ifdef CONFIG_RCU_USER_QS */
+
 #if defined(CONFIG_PROVE_RCU) && defined(CONFIG_HOTPLUG_CPU)
 
 /*