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SUNRPC: Support for RPC child tasks no longer needed 

The previous patches removed the last user of RPC child tasks, so we can
remove support for child tasks from net/sunrpc/sched.c now.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Chuck Lever 2006-08-22 20:06:16 -04:00 коммит произвёл Trond Myklebust
Родитель c4a5692fb8
Коммит 5b1eacbcd7
2 изменённых файлов: 0 добавлений и 87 удалений
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5
include/linux/sunrpc/sched.h
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@ -127,7 +127,6 @@ struct rpc_call_ops {
*/
#define RPC_TASK_ASYNC 0x0001 /* is an async task */
#define RPC_TASK_SWAPPER 0x0002 /* is swapping in/out */
#define RPC_TASK_CHILD 0x0008 /* is child of other task */
#define RPC_CALL_MAJORSEEN 0x0020 /* major timeout seen */
#define RPC_TASK_ROOTCREDS 0x0040 /* force root creds */
#define RPC_TASK_DYNAMIC 0x0080 /* task was kmalloc'ed */
@ -136,7 +135,6 @@ struct rpc_call_ops {
#define RPC_TASK_NOINTR 0x0400 /* uninterruptible task */
#define RPC_IS_ASYNC(t) ((t)->tk_flags & RPC_TASK_ASYNC)
#define RPC_IS_CHILD(t) ((t)->tk_flags & RPC_TASK_CHILD)
#define RPC_IS_SWAPPER(t) ((t)->tk_flags & RPC_TASK_SWAPPER)
#define RPC_DO_ROOTOVERRIDE(t) ((t)->tk_flags & RPC_TASK_ROOTCREDS)
#define RPC_ASSASSINATED(t) ((t)->tk_flags & RPC_TASK_KILLED)
@ -253,7 +251,6 @@ struct rpc_task *rpc_new_task(struct rpc_clnt *, int flags,
const struct rpc_call_ops *ops, void *data);
struct rpc_task *rpc_run_task(struct rpc_clnt *clnt, int flags,
const struct rpc_call_ops *ops, void *data);
struct rpc_task *rpc_new_child(struct rpc_clnt *, struct rpc_task *parent);
void rpc_init_task(struct rpc_task *task, struct rpc_clnt *clnt,
int flags, const struct rpc_call_ops *ops,
void *data);
@ -261,8 +258,6 @@ void rpc_release_task(struct rpc_task *);
void rpc_exit_task(struct rpc_task *);
void rpc_killall_tasks(struct rpc_clnt *);
int rpc_execute(struct rpc_task *);
void rpc_run_child(struct rpc_task *parent, struct rpc_task *child,
rpc_action action);
void rpc_init_priority_wait_queue(struct rpc_wait_queue *, const char *);
void rpc_init_wait_queue(struct rpc_wait_queue *, const char *);
void rpc_sleep_on(struct rpc_wait_queue *, struct rpc_task *,

82
net/sunrpc/sched.c
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@ -44,12 +44,6 @@ static void __rpc_default_timer(struct rpc_task *task);
static void rpciod_killall(void);
static void rpc_async_schedule(void *);
/*
* RPC tasks that create another task (e.g. for contacting the portmapper)
* will wait on this queue for their child's completion
*/
static RPC_WAITQ(childq, "childq");
/*
* RPC tasks sit here while waiting for conditions to improve.
*/
@ -323,16 +317,6 @@ static void rpc_make_runnable(struct rpc_task *task)
wake_up_bit(&task->tk_runstate, RPC_TASK_QUEUED);
}
/*
* Place a newly initialized task on the workqueue.
*/
static inline void
rpc_schedule_run(struct rpc_task *task)
{
rpc_set_active(task);
rpc_make_runnable(task);
}
/*
* Prepare for sleeping on a wait queue.
* By always appending tasks to the list we ensure FIFO behavior.
@ -933,72 +917,6 @@ struct rpc_task *rpc_run_task(struct rpc_clnt *clnt, int flags,
}
EXPORT_SYMBOL(rpc_run_task);
/**
* rpc_find_parent - find the parent of a child task.
* @child: child task
* @parent: parent task
*
* Checks that the parent task is still sleeping on the
* queue 'childq'. If so returns a pointer to the parent.
* Upon failure returns NULL.
*
* Caller must hold childq.lock
*/
static inline struct rpc_task *rpc_find_parent(struct rpc_task *child, struct rpc_task *parent)
{
struct rpc_task *task;
struct list_head *le;
task_for_each(task, le, &childq.tasks[0])
if (task == parent)
return parent;
return NULL;
}
static void rpc_child_exit(struct rpc_task *child, void *calldata)
{
struct rpc_task *parent;
spin_lock_bh(&childq.lock);
if ((parent = rpc_find_parent(child, calldata)) != NULL) {
parent->tk_status = child->tk_status;
__rpc_wake_up_task(parent);
}
spin_unlock_bh(&childq.lock);
}
static const struct rpc_call_ops rpc_child_ops = {
.rpc_call_done = rpc_child_exit,
};
/*
* Note: rpc_new_task releases the client after a failure.
*/
struct rpc_task *
rpc_new_child(struct rpc_clnt *clnt, struct rpc_task *parent)
{
struct rpc_task *task;
task = rpc_new_task(clnt, RPC_TASK_ASYNC | RPC_TASK_CHILD, &rpc_child_ops, parent);
if (!task)
goto fail;
return task;
fail:
parent->tk_status = -ENOMEM;
return NULL;
}
void rpc_run_child(struct rpc_task *task, struct rpc_task *child, rpc_action func)
{
spin_lock_bh(&childq.lock);
/* N.B. Is it possible for the child to have already finished? */
__rpc_sleep_on(&childq, task, func, NULL);
rpc_schedule_run(child);
spin_unlock_bh(&childq.lock);
}
/*
* Kill all tasks for the given client.
* XXX: kill their descendants as well?