1 files changed, 12 insertions, 0 deletions

diff --git a/kernel/rcu/update.c b/kernel/rcu/update.c
index 5f748c5a40f0..8fccda3a794d 100644
--- a/kernel/rcu/update.c
+++ b/kernel/rcu/update.c
@@ -61,6 +61,7 @@ MODULE_ALIAS("rcupdate");
 #define MODULE_PARAM_PREFIX "rcupdate."
 
 module_param(rcu_expedited, int, 0);
+module_param(rcu_normal, int, 0);
 
 #if defined(CONFIG_DEBUG_LOCK_ALLOC) && defined(CONFIG_PREEMPT_COUNT)
 /**
@@ -113,6 +114,17 @@ EXPORT_SYMBOL(rcu_read_lock_sched_held);
 
 #ifndef CONFIG_TINY_RCU
 
+/*
+ * Should expedited grace-period primitives always fall back to their
+ * non-expedited counterparts?  Intended for use within RCU.  Note
+ * that if the user specifies both rcu_expedited and rcu_normal, then
+ * rcu_normal wins.
+ */
+bool rcu_gp_is_normal(void)
+{
+        return READ_ONCE(rcu_normal);
+}
+
 static atomic_t rcu_expedited_nesting =
         ATOMIC_INIT(IS_ENABLED(CONFIG_RCU_EXPEDITE_BOOT) ? 1 : 0);