-
-
-struct work_queue_work {
- struct work_struct work;
- void (*fn)(void *);
- void *data;
-};
-
-static void execute_in_process_context_work(void *data)
-{
- void (*fn)(void *data);
- struct work_queue_work *wqw = data;
-
- fn = wqw->fn;
- data = wqw->data;
-
- kfree(wqw);
-
- fn(data);
-}
-
-/**
- * scsi_execute_in_process_context - reliably execute the routine with user context
- * @fn: the function to execute
- * @data: data to pass to the function
- *
- * Executes the function immediately if process context is available,
- * otherwise schedules the function for delayed execution.
- *
- * Returns: 0 - function was executed
- * 1 - function was scheduled for execution
- * <0 - error
- */
-int scsi_execute_in_process_context(void (*fn)(void *data), void *data)
-{
- struct work_queue_work *wqw;
-
- if (!in_interrupt()) {
- fn(data);
- return 0;
- }
-
- wqw = kmalloc(sizeof(struct work_queue_work), GFP_ATOMIC);
-
- if (unlikely(!wqw)) {
- printk(KERN_ERR "Failed to allocate memory\n");
- WARN_ON(1);
- return -ENOMEM;
- }
-
- INIT_WORK(&wqw->work, execute_in_process_context_work, wqw);
- wqw->fn = fn;
- wqw->data = data;
- schedule_work(&wqw->work);
-
- return 1;
-}
-EXPORT_SYMBOL_GPL(scsi_execute_in_process_context);