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rcu: Consolidate rcu_synchronize and wakeme_after_rcu()

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There are currently duplicate identical definitions of the
rcu_synchronize() structure and the wakeme_after_rcu() function.
Thie commit therefore consolidates them.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
This commit is contained in:
Paul E. McKenney 2015-01-10 19:47:10 -08:00
parent c517d838eb
commit ee376dbdf2
3 changed files with 15 additions and 26 deletions
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9
include/linux/rcupdate.h
View File

@ -195,6 +195,15 @@ void call_rcu_sched(struct rcu_head *head,
void synchronize_sched(void); 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 * call_rcu_tasks() - Queue an RCU for invocation task-based grace period
* @head: structure to be used for queueing the RCU updates. * @head: structure to be used for queueing the RCU updates.

17
kernel/rcu/srcu.c
View File

@ -402,23 +402,6 @@ void call_srcu(struct srcu_struct *sp, struct rcu_head *head,
} }
EXPORT_SYMBOL_GPL(call_srcu); EXPORT_SYMBOL_GPL(call_srcu);
struct rcu_synchronize {
struct rcu_head head;
struct completion completion;
};
/*
* Awaken the corresponding synchronize_srcu() instance now that a
* grace period has elapsed.
*/
static void wakeme_after_rcu(struct rcu_head *head)
{
struct rcu_synchronize *rcu;
rcu = container_of(head, struct rcu_synchronize, head);
complete(&rcu->completion);
}
static void srcu_advance_batches(struct srcu_struct *sp, int trycount); static void srcu_advance_batches(struct srcu_struct *sp, int trycount);
static void srcu_reschedule(struct srcu_struct *sp); static void srcu_reschedule(struct srcu_struct *sp);

15
kernel/rcu/update.c
View File

@ -199,16 +199,13 @@ EXPORT_SYMBOL_GPL(rcu_read_lock_bh_held);
#endif /* #ifdef CONFIG_DEBUG_LOCK_ALLOC */ #endif /* #ifdef CONFIG_DEBUG_LOCK_ALLOC */
struct rcu_synchronize { /**
struct rcu_head head; * wakeme_after_rcu() - Callback function to awaken a task after grace period
struct completion completion; * @head: Pointer to rcu_head member within rcu_synchronize structure
}; *
* Awaken the corresponding task now that a grace period has elapsed.
/*
* Awaken the corresponding synchronize_rcu() instance now that a
* grace period has elapsed.
*/ */
static void wakeme_after_rcu(struct rcu_head *head) void wakeme_after_rcu(struct rcu_head *head)
{ {
struct rcu_synchronize *rcu; struct rcu_synchronize *rcu;