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-rw-r--r--include/linux/rcutree.h16
1 files changed, 16 insertions, 0 deletions
diff --git a/include/linux/rcutree.h b/include/linux/rcutree.h
index c739d90f5e68..a89307717825 100644
--- a/include/linux/rcutree.h
+++ b/include/linux/rcutree.h
@@ -35,14 +35,30 @@ extern void rcu_bh_qs(int cpu);
extern int rcu_needs_cpu(int cpu);
+#ifdef CONFIG_TREE_PREEMPT_RCU
+
+extern void __rcu_read_lock(void);
+extern void __rcu_read_unlock(void);
+extern void exit_rcu(void);
+
+#else /* #ifdef CONFIG_TREE_PREEMPT_RCU */
+
static inline void __rcu_read_lock(void)
{
preempt_disable();
}
+
static inline void __rcu_read_unlock(void)
{
preempt_enable();
}
+
+static inline void exit_rcu(void)
+{
+}
+
+#endif /* #else #ifdef CONFIG_TREE_PREEMPT_RCU */
+
static inline void __rcu_read_lock_bh(void)
{
local_bh_disable();