rcu: Move rnp->lock wrappers for SRCU use

This commit moves the now-generic rnp->lock wrapper macros from
kernel/rcu/tree.h to kernel/rcu/rcu.h, thus allowing SRCU to use them.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

1 files changed, 0 insertions, 53 deletions

diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h
index a7f63f1074b4..baa0bac8da2a 100644
--- a/kernel/rcu/tree.h
+++ b/kernel/rcu/tree.h
@@ -565,56 +565,3 @@ static inline void rcu_nocb_q_lengths(struct rcu_data *rdp, long *ql, long *qll)
 #endif /* #else #ifdef CONFIG_RCU_NOCB_CPU */
 }
 #endif /* #ifdef CONFIG_RCU_TRACE */
-
-/*
- * Wrappers for the rcu_node::lock acquire and release.
- *
- * Because the rcu_nodes form a tree, the tree traversal locking will observe
- * different lock values, this in turn means that an UNLOCK of one level
- * followed by a LOCK of another level does not imply a full memory barrier;
- * and most importantly transitivity is lost.
- *
- * In order to restore full ordering between tree levels, augment the regular
- * lock acquire functions with smp_mb__after_unlock_lock().
- *
- * As ->lock of struct rcu_node is a __private field, therefore one should use
- * these wrappers rather than directly call raw_spin_{lock,unlock}* on ->lock.
- */
-#define raw_spin_lock_rcu_node(p)					\
-do {									\
-	raw_spin_lock(&ACCESS_PRIVATE(p, lock));			\
-	smp_mb__after_unlock_lock();					\
-} while (0)
-
-#define raw_spin_unlock_rcu_node(p) raw_spin_unlock(&ACCESS_PRIVATE(p, lock))
-
-#define raw_spin_lock_irq_rcu_node(p)					\
-do {									\
-	raw_spin_lock_irq(&ACCESS_PRIVATE(p, lock));			\
-	smp_mb__after_unlock_lock();					\
-} while (0)
-
-#define raw_spin_unlock_irq_rcu_node(p)					\
-	raw_spin_unlock_irq(&ACCESS_PRIVATE(p, lock))
-
-#define raw_spin_lock_irqsave_rcu_node(rnp, flags)			\
-do {									\
-	typecheck(unsigned long, flags);				\
-	raw_spin_lock_irqsave(&ACCESS_PRIVATE(rnp, lock), flags);	\
-	smp_mb__after_unlock_lock();					\
-} while (0)
-
-#define raw_spin_unlock_irqrestore_rcu_node(rnp, flags)			\
-do {									\
-	typecheck(unsigned long, flags);				\
-	raw_spin_unlock_irqrestore(&ACCESS_PRIVATE(rnp, lock), flags);	\
-} while (0)
-
-#define raw_spin_trylock_rcu_node(p)					\
-({									\
-	bool ___locked = raw_spin_trylock(&ACCESS_PRIVATE(p, lock));	\
-									\
-	if (___locked)							\
-		smp_mb__after_unlock_lock();				\
-	___locked;							\
-})