SUNRPC: Add a new helper rpc_wake_up_queued_task()

In all cases where we currently use rpc_wake_up_task(), we almost always
know on which waitqueue the rpc_task is actually sleeping. This will allows
us to simplify the queue locking in a future patch.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/include/linux/sunrpc/sched.h b/include/linux/sunrpc/sched.h
index fefb0ab5218..83f67779cf0 100644
--- a/include/linux/sunrpc/sched.h
+++ b/include/linux/sunrpc/sched.h
@@ -33,7 +33,6 @@ struct rpc_wait_queue;
 struct rpc_wait {
         struct list_head        list;           /* wait queue links */
         struct list_head        links;          /* Links to related tasks */
-        struct rpc_wait_queue * rpc_waitq;      /* RPC wait queue we're on */
 };
 
 /*
@@ -80,6 +79,7 @@ struct rpc_task {
         struct workqueue_struct *tk_workqueue;  /* Normally rpciod, but could
                                                  * be any workqueue
                                                  */
+        struct rpc_wait_queue   *tk_waitqueue;  /* RPC wait queue we're on */
         union {
                 struct work_struct      tk_work;        /* Async task work queue */
                 struct rpc_wait         tk_wait;        /* RPC wait */
@@ -233,6 +233,8 @@ void		rpc_init_wait_queue(struct rpc_wait_queue *, const char *);
 void            rpc_sleep_on(struct rpc_wait_queue *, struct rpc_task *,
                                         rpc_action action, rpc_action timer);
 void            rpc_wake_up_task(struct rpc_task *);
+void            rpc_wake_up_queued_task(struct rpc_wait_queue *,
+                                        struct rpc_task *);
 void            rpc_wake_up(struct rpc_wait_queue *);
 struct rpc_task *rpc_wake_up_next(struct rpc_wait_queue *);
 void            rpc_wake_up_status(struct rpc_wait_queue *, int);