Merge branches 'doc.2015.02.26a', 'earlycb.2015.03.03a', 'fixes.2015.03.03a', 'gpexp...

[linux-2.6-block.git] / include / linux / rcupdate.h

diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
index 78097491cd99a693f41b45e2b12ea1a4119cb52d..573a5afd5ed884d5bdcfc4af6cf88c3b9d25214d 100644 (file)
--- a/include/linux/rcupdate.h
+++ b/include/linux/rcupdate.h
@@ -48,6 +48,26 @@
 
 extern int rcu_expedited; /* for sysctl */
 
+#ifdef CONFIG_TINY_RCU
+/* Tiny RCU doesn't expedite, as its purpose in life is instead to be tiny. */
+static inline bool rcu_gp_is_expedited(void)  /* Internal RCU use. */
+{
+       return false;
+}
+
+static inline void rcu_expedite_gp(void)
+{
+}
+
+static inline void rcu_unexpedite_gp(void)
+{
+}
+#else /* #ifdef CONFIG_TINY_RCU */
+bool rcu_gp_is_expedited(void);  /* Internal RCU use. */
+void rcu_expedite_gp(void);
+void rcu_unexpedite_gp(void);
+#endif /* #else #ifdef CONFIG_TINY_RCU */
+
 enum rcutorture_type {
        RCU_FLAVOR,
        RCU_BH_FLAVOR,
@@ -195,6 +215,15 @@ void call_rcu_sched(struct rcu_head *head,
 
 void synchronize_sched(void);
 
+/*
+ * Structure allowing asynchronous waiting on RCU.
+ */
+struct rcu_synchronize {
+       struct rcu_head head;
+       struct completion completion;
+};
+void wakeme_after_rcu(struct rcu_head *head);
+
 /**
  * call_rcu_tasks() - Queue an RCU for invocation task-based grace period
  * @head: structure to be used for queueing the RCU updates.
@@ -258,6 +287,7 @@ static inline int rcu_preempt_depth(void)
 
 /* Internal to kernel */
 void rcu_init(void);
+void rcu_end_inkernel_boot(void);
 void rcu_sched_qs(void);
 void rcu_bh_qs(void);
 void rcu_check_callbacks(int user);
@@ -266,6 +296,8 @@ void rcu_idle_enter(void);
 void rcu_idle_exit(void);
 void rcu_irq_enter(void);
 void rcu_irq_exit(void);
+int rcu_cpu_notify(struct notifier_block *self,
+                  unsigned long action, void *hcpu);
 
 #ifdef CONFIG_RCU_STALL_COMMON
 void rcu_sysrq_start(void);
@@ -720,7 +752,7 @@ static inline void rcu_preempt_sleep_check(void)
  * annotated as __rcu.
  */
 #define rcu_dereference_check(p, c) \
-       __rcu_dereference_check((p), rcu_read_lock_held() || (c), __rcu)
+       __rcu_dereference_check((p), (c) || rcu_read_lock_held(), __rcu)
 
 /**
  * rcu_dereference_bh_check() - rcu_dereference_bh with debug checking
@@ -730,7 +762,7 @@ static inline void rcu_preempt_sleep_check(void)
  * This is the RCU-bh counterpart to rcu_dereference_check().
  */
 #define rcu_dereference_bh_check(p, c) \
-       __rcu_dereference_check((p), rcu_read_lock_bh_held() || (c), __rcu)
+       __rcu_dereference_check((p), (c) || rcu_read_lock_bh_held(), __rcu)
 
 /**
  * rcu_dereference_sched_check() - rcu_dereference_sched with debug checking
@@ -740,7 +772,7 @@ static inline void rcu_preempt_sleep_check(void)
  * This is the RCU-sched counterpart to rcu_dereference_check().
  */
 #define rcu_dereference_sched_check(p, c) \
-       __rcu_dereference_check((p), rcu_read_lock_sched_held() || (c), \
+       __rcu_dereference_check((p), (c) || rcu_read_lock_sched_held(), \
                                __rcu)
 
 #define rcu_dereference_raw(p) rcu_dereference_check(p, 1) /*@@@ needed? @@@*/
@@ -933,9 +965,9 @@ static inline void rcu_read_unlock(void)
 {
        rcu_lockdep_assert(rcu_is_watching(),
                           "rcu_read_unlock() used illegally while idle");
-       rcu_lock_release(&rcu_lock_map);
        __release(RCU);
        __rcu_read_unlock();
+       rcu_lock_release(&rcu_lock_map); /* Keep acq info for rls diags. */
 }
 
 /**