vhost.c (6e9041c6ddd6cbdc61d87bcaca8ca7bb17c28377) vhost.c (05c05351943cc03bf5c77e86953b24ae6fb21368)
1/* Copyright (C) 2009 Red Hat, Inc.
2 * Copyright (C) 2006 Rusty Russell IBM Corporation
3 *
4 * Author: Michael S. Tsirkin <mst@redhat.com>
5 *
6 * Inspiration, some code, and most witty comments come from
7 * Documentation/virtual/lguest/lguest.c, by Rusty Russell
8 *

--- 330 unchanged lines hidden (view full) ---

339 attach.owner = current;
340 vhost_work_init(&attach.work, vhost_attach_cgroups_work);
341 vhost_work_queue(dev, &attach.work);
342 vhost_work_flush(dev, &attach.work);
343 return attach.ret;
344}
345
346/* Caller should have device mutex */
1/* Copyright (C) 2009 Red Hat, Inc.
2 * Copyright (C) 2006 Rusty Russell IBM Corporation
3 *
4 * Author: Michael S. Tsirkin <mst@redhat.com>
5 *
6 * Inspiration, some code, and most witty comments come from
7 * Documentation/virtual/lguest/lguest.c, by Rusty Russell
8 *

--- 330 unchanged lines hidden (view full) ---

339 attach.owner = current;
340 vhost_work_init(&attach.work, vhost_attach_cgroups_work);
341 vhost_work_queue(dev, &attach.work);
342 vhost_work_flush(dev, &attach.work);
343 return attach.ret;
344}
345
346/* Caller should have device mutex */
347bool vhost_dev_has_owner(struct vhost_dev *dev)
348{
349 return dev->mm;
350}
351
352/* Caller should have device mutex */
347long vhost_dev_set_owner(struct vhost_dev *dev)
348{
349 struct task_struct *worker;
350 int err;
351
352 /* Is there an owner already? */
353long vhost_dev_set_owner(struct vhost_dev *dev)
354{
355 struct task_struct *worker;
356 int err;
357
358 /* Is there an owner already? */
353 if (dev->mm) {
359 if (vhost_dev_has_owner(dev)) {
354 err = -EBUSY;
355 goto err_mm;
356 }
357
358 /* No owner, become one */
359 dev->mm = get_task_mm(current);
360 worker = kthread_create(vhost_worker, dev, "vhost-%d", current->pid);
361 if (IS_ERR(worker)) {

--- 1168 unchanged lines hidden --- 		360 err = -EBUSY;
361 goto err_mm;
362 }
363
364 /* No owner, become one */
365 dev->mm = get_task_mm(current);
366 worker = kthread_create(vhost_worker, dev, "vhost-%d", current->pid);
367 if (IS_ERR(worker)) {

--- 1168 unchanged lines hidden ---