SUNRPC: Ensure that rpc_exit() always wakes up a sleeping task

Make rpc_exit() non-inline, and ensure that it always wakes up a task that
has been queued.

Kill off the now unused rpc_wake_up_task().

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

diff --git a/include/linux/sunrpc/sched.h b/include/linux/sunrpc/sched.h
index 7be4f3a..88513fd 100644 (file)
--- a/include/linux/sunrpc/sched.h
+++ b/include/linux/sunrpc/sched.h
@@ -213,6 +213,7 @@ struct rpc_task *rpc_run_bc_task(struct rpc_rqst *req,
                                const struct rpc_call_ops *ops);
 void           rpc_put_task(struct rpc_task *);
 void           rpc_exit_task(struct rpc_task *);
+void           rpc_exit(struct rpc_task *, int);
 void           rpc_release_calldata(const struct rpc_call_ops *, void *);
 void           rpc_killall_tasks(struct rpc_clnt *);
 void           rpc_execute(struct rpc_task *);
@@ -241,12 +242,6 @@ void               rpc_destroy_mempool(void);
 extern struct workqueue_struct *rpciod_workqueue;
 void           rpc_prepare_task(struct rpc_task *task);
 
-static inline void rpc_exit(struct rpc_task *task, int status)
-{
-       task->tk_status = status;
-       task->tk_action = rpc_exit_task;
-}
-
 static inline int rpc_wait_for_completion_task(struct rpc_task *task)
 {
        return __rpc_wait_for_completion_task(task, NULL);

diff --git a/net/sunrpc/sched.c b/net/sunrpc/sched.c
index 4a843b8..3745276 100644 (file)
--- a/net/sunrpc/sched.c
+++ b/net/sunrpc/sched.c
@@ -405,14 +405,6 @@ void rpc_wake_up_queued_task(struct rpc_wait_queue *queue, struct rpc_task *task
 }
 EXPORT_SYMBOL_GPL(rpc_wake_up_queued_task);
 
-/*
- * Wake up the specified task
- */
-static void rpc_wake_up_task(struct rpc_task *task)
-{
-       rpc_wake_up_queued_task(task->tk_waitqueue, task);
-}
-
 /*
  * Wake up the next task on a priority queue.
  */
@@ -600,7 +592,15 @@ void rpc_exit_task(struct rpc_task *task)
                }
        }
 }
-EXPORT_SYMBOL_GPL(rpc_exit_task);
+
+void rpc_exit(struct rpc_task *task, int status)
+{
+       task->tk_status = status;
+       task->tk_action = rpc_exit_task;
+       if (RPC_IS_QUEUED(task))
+               rpc_wake_up_queued_task(task->tk_waitqueue, task);
+}
+EXPORT_SYMBOL_GPL(rpc_exit);
 
 void rpc_release_calldata(const struct rpc_call_ops *ops, void *calldata)
 {
@@ -690,7 +690,6 @@ static void __rpc_execute(struct rpc_task *task)
                        dprintk("RPC: %5u got signal\n", task->tk_pid);
                        task->tk_flags |= RPC_TASK_KILLED;
                        rpc_exit(task, -ERESTARTSYS);
-                       rpc_wake_up_task(task);
                }
                rpc_set_running(task);
                dprintk("RPC: %5u sync task resuming\n", task->tk_pid);
@@ -950,7 +949,6 @@ void rpc_killall_tasks(struct rpc_clnt *clnt)
                if (!(rovr->tk_flags & RPC_TASK_KILLED)) {
                        rovr->tk_flags |= RPC_TASK_KILLED;
                        rpc_exit(rovr, -EIO);
-                       rpc_wake_up_task(rovr);
                }
        }
        spin_unlock(&clnt->cl_lock);