sysfs, driver-core: remove unused {sysfs|device}_schedule_callback_owner()

All device_schedule_callback_owner() users are converted to use
device_remove_file_self().  Remove now unused
{sysfs|device}_schedule_callback_owner().

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 0 insertions, 92 deletions

diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index 1b8b91b67fdb..28cc1acd5439 100644
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -453,95 +453,3 @@ void sysfs_remove_bin_file(struct kobject *kobj,
         kernfs_remove_by_name(kobj->sd, attr->attr.name);
 }
 EXPORT_SYMBOL_GPL(sysfs_remove_bin_file);
-
-struct sysfs_schedule_callback_struct {
-        struct list_head        workq_list;
-        struct kobject          *kobj;
-        void                    (*func)(void *);
-        void                    *data;
-        struct module           *owner;
-        struct work_struct      work;
-};
-
-static struct workqueue_struct *sysfs_workqueue;
-static DEFINE_MUTEX(sysfs_workq_mutex);
-static LIST_HEAD(sysfs_workq);
-static void sysfs_schedule_callback_work(struct work_struct *work)
-{
-        struct sysfs_schedule_callback_struct *ss = container_of(work,
-                        struct sysfs_schedule_callback_struct, work);
-
-        (ss->func)(ss->data);
-        kobject_put(ss->kobj);
-        module_put(ss->owner);
-        mutex_lock(&sysfs_workq_mutex);
-        list_del(&ss->workq_list);
-        mutex_unlock(&sysfs_workq_mutex);
-        kfree(ss);
-}
-
-/**
- * sysfs_schedule_callback - helper to schedule a callback for a kobject
- * @kobj: object we're acting for.
- * @func: callback function to invoke later.
- * @data: argument to pass to @func.
- * @owner: module owning the callback code
- *
- * sysfs attribute methods must not unregister themselves or their parent
- * kobject (which would amount to the same thing).  Attempts to do so will
- * deadlock, since unregistration is mutually exclusive with driver
- * callbacks.
- *
- * Instead methods can call this routine, which will attempt to allocate
- * and schedule a workqueue request to call back @func with @data as its
- * argument in the workqueue's process context.  @kobj will be pinned
- * until @func returns.
- *
- * Returns 0 if the request was submitted, -ENOMEM if storage could not
- * be allocated, -ENODEV if a reference to @owner isn't available,
- * -EAGAIN if a callback has already been scheduled for @kobj.
- */
-int sysfs_schedule_callback(struct kobject *kobj, void (*func)(void *),
-                void *data, struct module *owner)
-{
-        struct sysfs_schedule_callback_struct *ss, *tmp;
-
-        if (!try_module_get(owner))
-                return -ENODEV;
-
-        mutex_lock(&sysfs_workq_mutex);
-        list_for_each_entry_safe(ss, tmp, &sysfs_workq, workq_list)
-                if (ss->kobj == kobj) {
-                        module_put(owner);
-                        mutex_unlock(&sysfs_workq_mutex);
-                        return -EAGAIN;
-                }
-        mutex_unlock(&sysfs_workq_mutex);
-
-        if (sysfs_workqueue == NULL) {
-                sysfs_workqueue = create_singlethread_workqueue("sysfsd");
-                if (sysfs_workqueue == NULL) {
-                        module_put(owner);
-                        return -ENOMEM;
-                }
-        }
-
-        ss = kmalloc(sizeof(*ss), GFP_KERNEL);
-        if (!ss) {
-                module_put(owner);
-                return -ENOMEM;
-        }
-        kobject_get(kobj);
-        ss->kobj = kobj;
-        ss->func = func;
-        ss->data = data;
-        ss->owner = owner;
-        INIT_WORK(&ss->work, sysfs_schedule_callback_work);
-        INIT_LIST_HEAD(&ss->workq_list);
-        mutex_lock(&sysfs_workq_mutex);
-        list_add_tail(&ss->workq_list, &sysfs_workq);
-        mutex_unlock(&sysfs_workq_mutex);
-        queue_work(sysfs_workqueue, &ss->work);
-        return 0;
-}
-EXPORT_SYMBOL_GPL(sysfs_schedule_callback);