rcu: Warn when rcu_read_lock() is used in extended quiescent state

[linux-beck.git] / include / linux / rcupdate.h

diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
index bf91fcfe181cee9b32dc5d49548ccc44f8ce3001..d201c155f70c27dbeb2c456dd87d76b2288843dc 100644 (file)
--- a/include/linux/rcupdate.h
+++ b/include/linux/rcupdate.h
@@ -237,21 +237,53 @@ static inline int rcu_is_cpu_idle(void)
 }
 #endif /* else !CONFIG_PROVE_RCU */
 
+static inline void rcu_lock_acquire(struct lockdep_map *map)
+{
+       WARN_ON_ONCE(rcu_is_cpu_idle());
+       lock_acquire(map, 0, 0, 2, 1, NULL, _THIS_IP_);
+}
+
+static inline void rcu_lock_release(struct lockdep_map *map)
+{
+       WARN_ON_ONCE(rcu_is_cpu_idle());
+       lock_release(map, 1, _THIS_IP_);
+}
+
 extern struct lockdep_map rcu_lock_map;
-# define rcu_read_acquire() \
-               lock_acquire(&rcu_lock_map, 0, 0, 2, 1, NULL, _THIS_IP_)
-# define rcu_read_release()    lock_release(&rcu_lock_map, 1, _THIS_IP_)
+
+static inline void rcu_read_acquire(void)
+{
+       rcu_lock_acquire(&rcu_lock_map);
+}
+
+static inline void rcu_read_release(void)
+{
+       rcu_lock_release(&rcu_lock_map);
+}
 
 extern struct lockdep_map rcu_bh_lock_map;
-# define rcu_read_acquire_bh() \
-               lock_acquire(&rcu_bh_lock_map, 0, 0, 2, 1, NULL, _THIS_IP_)
-# define rcu_read_release_bh() lock_release(&rcu_bh_lock_map, 1, _THIS_IP_)
+
+static inline void rcu_read_acquire_bh(void)
+{
+       rcu_lock_acquire(&rcu_bh_lock_map);
+}
+
+static inline void rcu_read_release_bh(void)
+{
+       rcu_lock_release(&rcu_bh_lock_map);
+}
 
 extern struct lockdep_map rcu_sched_lock_map;
-# define rcu_read_acquire_sched() \
-               lock_acquire(&rcu_sched_lock_map, 0, 0, 2, 1, NULL, _THIS_IP_)
-# define rcu_read_release_sched() \
-               lock_release(&rcu_sched_lock_map, 1, _THIS_IP_)
+
+static inline void rcu_read_acquire_sched(void)
+{
+       rcu_lock_acquire(&rcu_sched_lock_map);
+}
+
+static inline void rcu_read_release_sched(void)
+{
+       rcu_lock_release(&rcu_sched_lock_map);
+}
 
 extern int debug_lockdep_rcu_enabled(void);