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Message-Id: <20180829225405.7275-4-paulmck@linux.vnet.ibm.com>
Date: Wed, 29 Aug 2018 15:53:45 -0700
From: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To: linux-kernel@...r.kernel.org
Cc: mingo@...nel.org, jiangshanlai@...il.com, dipankar@...ibm.com,
akpm@...ux-foundation.org, mathieu.desnoyers@...icios.com,
josh@...htriplett.org, tglx@...utronix.de, peterz@...radead.org,
rostedt@...dmis.org, dhowells@...hat.com, edumazet@...gle.com,
fweisbec@...il.com, oleg@...hat.com, joel@...lfernandes.org,
"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Subject: [PATCH tip/core/rcu 04/24] rcu: Consolidate RCU-sched update-side function definitions
This commit saves a few lines by consolidating the RCU-sched function
definitions at the end of include/linux/rcupdate.h. This consolidation
also makes it easier to remove them all when the time comes.
Signed-off-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
---
include/linux/rcupdate.h | 38 +++++++++++++++++++++-----
include/linux/rcutiny.h | 32 +---------------------
include/linux/rcutree.h | 9 -------
kernel/rcu/tree.c | 58 ----------------------------------------
4 files changed, 32 insertions(+), 105 deletions(-)
diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
index e530f5739033..12103e1bbe67 100644
--- a/include/linux/rcupdate.h
+++ b/include/linux/rcupdate.h
@@ -48,12 +48,6 @@
#define ulong2long(a) (*(long *)(&(a)))
/* Exported common interfaces */
-
-#ifndef CONFIG_TINY_RCU
-void synchronize_sched(void);
-void call_rcu_sched(struct rcu_head *head, rcu_callback_t func);
-#endif
-
void call_rcu(struct rcu_head *head, rcu_callback_t func);
void rcu_barrier_tasks(void);
void synchronize_rcu(void);
@@ -170,7 +164,7 @@ void exit_tasks_rcu_finish(void);
#define rcu_tasks_qs(t) do { } while (0)
#define rcu_note_voluntary_context_switch(t) rcu_all_qs()
#define call_rcu_tasks call_rcu_sched
-#define synchronize_rcu_tasks synchronize_sched
+#define synchronize_rcu_tasks synchronize_rcu
static inline void exit_tasks_rcu_start(void) { }
static inline void exit_tasks_rcu_finish(void) { }
#endif /* #else #ifdef CONFIG_TASKS_RCU */
@@ -892,4 +886,34 @@ static inline void rcu_barrier_bh(void)
rcu_barrier();
}
+static inline void synchronize_sched(void)
+{
+ synchronize_rcu();
+}
+
+static inline void synchronize_sched_expedited(void)
+{
+ synchronize_rcu_expedited();
+}
+
+static inline void call_rcu_sched(struct rcu_head *head, rcu_callback_t func)
+{
+ call_rcu(head, func);
+}
+
+static inline void rcu_barrier_sched(void)
+{
+ rcu_barrier();
+}
+
+static inline unsigned long get_state_synchronize_sched(void)
+{
+ return get_state_synchronize_rcu();
+}
+
+static inline void cond_synchronize_sched(unsigned long oldstate)
+{
+ cond_synchronize_rcu(oldstate);
+}
+
#endif /* __LINUX_RCUPDATE_H */
diff --git a/include/linux/rcutiny.h b/include/linux/rcutiny.h
index df82bada9b19..7fa4fb9e899e 100644
--- a/include/linux/rcutiny.h
+++ b/include/linux/rcutiny.h
@@ -36,11 +36,6 @@ static inline int rcu_dynticks_snap(struct rcu_dynticks *rdtp)
/* Never flag non-existent other CPUs! */
static inline bool rcu_eqs_special_set(int cpu) { return false; }
-static inline void synchronize_sched(void)
-{
- synchronize_rcu();
-}
-
static inline unsigned long get_state_synchronize_rcu(void)
{
return 0;
@@ -51,36 +46,11 @@ static inline void cond_synchronize_rcu(unsigned long oldstate)
might_sleep();
}
-static inline unsigned long get_state_synchronize_sched(void)
-{
- return 0;
-}
-
-static inline void cond_synchronize_sched(unsigned long oldstate)
-{
- might_sleep();
-}
-
extern void rcu_barrier(void);
-static inline void rcu_barrier_sched(void)
-{
- rcu_barrier(); /* Only one CPU, so only one list of callbacks! */
-}
-
static inline void synchronize_rcu_expedited(void)
{
- synchronize_sched();
-}
-
-static inline void synchronize_sched_expedited(void)
-{
- synchronize_sched();
-}
-
-static inline void call_rcu_sched(struct rcu_head *head, rcu_callback_t func)
-{
- call_rcu(head, func);
+ synchronize_rcu();
}
static inline void kfree_call_rcu(struct rcu_head *head, rcu_callback_t func)
diff --git a/include/linux/rcutree.h b/include/linux/rcutree.h
index 94820156aa62..d09a9abe9440 100644
--- a/include/linux/rcutree.h
+++ b/include/linux/rcutree.h
@@ -46,21 +46,12 @@ static inline void rcu_virt_note_context_switch(int cpu)
}
void synchronize_rcu_expedited(void);
-
-static inline void synchronize_sched_expedited(void)
-{
- synchronize_rcu_expedited();
-}
-
void kfree_call_rcu(struct rcu_head *head, rcu_callback_t func);
void rcu_barrier(void);
-void rcu_barrier_sched(void);
bool rcu_eqs_special_set(int cpu);
unsigned long get_state_synchronize_rcu(void);
void cond_synchronize_rcu(unsigned long oldstate);
-unsigned long get_state_synchronize_sched(void);
-void cond_synchronize_sched(unsigned long oldstate);
void rcu_idle_enter(void);
void rcu_idle_exit(void);
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index f1e8a4431ebd..b2ebdd01c8a2 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -2949,19 +2949,6 @@ void call_rcu(struct rcu_head *head, rcu_callback_t func)
}
EXPORT_SYMBOL_GPL(call_rcu);
-/**
- * call_rcu_sched() - Queue an RCU for invocation after sched grace period.
- * @head: structure to be used for queueing the RCU updates.
- * @func: actual callback function to be invoked after the grace period
- *
- * This is transitional.
- */
-void call_rcu_sched(struct rcu_head *head, rcu_callback_t func)
-{
- call_rcu(head, func);
-}
-EXPORT_SYMBOL_GPL(call_rcu_sched);
-
/*
* Queue an RCU callback for lazy invocation after a grace period.
* This will likely be later named something like "call_rcu_lazy()",
@@ -2975,17 +2962,6 @@ void kfree_call_rcu(struct rcu_head *head, rcu_callback_t func)
}
EXPORT_SYMBOL_GPL(kfree_call_rcu);
-/**
- * synchronize_sched - wait until an rcu-sched grace period has elapsed.
- *
- * This is transitional.
- */
-void synchronize_sched(void)
-{
- synchronize_rcu();
-}
-EXPORT_SYMBOL_GPL(synchronize_sched);
-
/**
* get_state_synchronize_rcu - Snapshot current RCU state
*
@@ -3027,29 +3003,6 @@ void cond_synchronize_rcu(unsigned long oldstate)
}
EXPORT_SYMBOL_GPL(cond_synchronize_rcu);
-/**
- * get_state_synchronize_sched - Snapshot current RCU-sched state
- *
- * This is transitional, and only used by rcutorture.
- */
-unsigned long get_state_synchronize_sched(void)
-{
- return get_state_synchronize_rcu();
-}
-EXPORT_SYMBOL_GPL(get_state_synchronize_sched);
-
-/**
- * cond_synchronize_sched - Conditionally wait for an RCU-sched grace period
- * @oldstate: return value from earlier call to get_state_synchronize_sched()
- *
- * This is transitional and only used by rcutorture.
- */
-void cond_synchronize_sched(unsigned long oldstate)
-{
- cond_synchronize_rcu(oldstate);
-}
-EXPORT_SYMBOL_GPL(cond_synchronize_sched);
-
/*
* Check to see if there is any immediate RCU-related work to be done by
* the current CPU, for the specified type of RCU, returning 1 if so and
@@ -3265,17 +3218,6 @@ void rcu_barrier(void)
}
EXPORT_SYMBOL_GPL(rcu_barrier);
-/**
- * rcu_barrier_sched - Wait for in-flight call_rcu_sched() callbacks.
- *
- * This is transitional.
- */
-void rcu_barrier_sched(void)
-{
- rcu_barrier();
-}
-EXPORT_SYMBOL_GPL(rcu_barrier_sched);
-
/*
* Propagate ->qsinitmask bits up the rcu_node tree to account for the
* first CPU in a given leaf rcu_node structure coming online. The caller
--
2.17.1
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