1 files changed, 9 insertions, 0 deletions

diff --git a/kernel/rcutree.h b/kernel/rcutree.h
index 0024e5ddcc68..ca560364d8cd 100644
--- a/kernel/rcutree.h
+++ b/kernel/rcutree.h
@@ -80,6 +80,7 @@ struct rcu_dynticks {
  */
 struct rcu_node {
         spinlock_t lock;
+        long    gpnum;          /* Current grace period for this node. */
         unsigned long qsmask;   /* CPUs or groups that need to switch in */
                                 /*  order for current grace period to proceed.*/
         unsigned long qsmaskinit;
@@ -90,6 +91,8 @@ struct rcu_node {
         u8      grpnum;         /* CPU/group number for next level up. */
         u8      level;          /* root is at level 0. */
         struct rcu_node *parent;
+        struct list_head blocked_tasks[2];
+                                /* Tasks blocked in RCU read-side critsect. */
 } ____cacheline_internodealigned_in_smp;
 
 /* Index values for nxttail array in struct rcu_data. */
@@ -111,6 +114,7 @@ struct rcu_data {
         bool            passed_quiesc;  /* User-mode/idle loop etc. */
         bool            qs_pending;     /* Core waits for quiesc state. */
         bool            beenonline;     /* CPU online at least once. */
+        bool            preemptable;    /* Preemptable RCU? */
         struct rcu_node *mynode;        /* This CPU's leaf of hierarchy */
         unsigned long grpmask;          /* Mask to apply to leaf qsmask. */
 
@@ -244,5 +248,10 @@ DECLARE_PER_CPU(struct rcu_data, rcu_sched_data);
 extern struct rcu_state rcu_bh_state;
 DECLARE_PER_CPU(struct rcu_data, rcu_bh_data);
 
+#ifdef CONFIG_TREE_PREEMPT_RCU
+extern struct rcu_state rcu_preempt_state;
+DECLARE_PER_CPU(struct rcu_data, rcu_preempt_data);
+#endif /* #ifdef CONFIG_TREE_PREEMPT_RCU */
+
 #endif /* #ifdef RCU_TREE_NONCORE */