diff options
Diffstat (limited to 'drivers/vhost/vhost.c')
| -rw-r--r-- | drivers/vhost/vhost.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c index c14c42b95ab..947f00d8e09 100644 --- a/drivers/vhost/vhost.c +++ b/drivers/vhost/vhost.c @@ -222,6 +222,8 @@ static int vhost_worker(void *data) if (work) { __set_current_state(TASK_RUNNING); work->fn(work); + if (need_resched()) + schedule(); } else schedule(); @@ -403,7 +405,7 @@ long vhost_dev_reset_owner(struct vhost_dev *dev) if (!memory) return -ENOMEM; - vhost_dev_cleanup(dev); + vhost_dev_cleanup(dev, true); memory->nregions = 0; RCU_INIT_POINTER(dev->memory, memory); @@ -434,8 +436,8 @@ int vhost_zerocopy_signal_used(struct vhost_virtqueue *vq) return j; } -/* Caller should have device mutex */ -void vhost_dev_cleanup(struct vhost_dev *dev) +/* Caller should have device mutex if and only if locked is set */ +void vhost_dev_cleanup(struct vhost_dev *dev, bool locked) { int i; @@ -472,7 +474,8 @@ void vhost_dev_cleanup(struct vhost_dev *dev) dev->log_file = NULL; /* No one will access memory at this point */ kfree(rcu_dereference_protected(dev->memory, - lockdep_is_held(&dev->mutex))); + locked == + lockdep_is_held(&dev->mutex))); RCU_INIT_POINTER(dev->memory, NULL); WARN_ON(!list_empty(&dev->work_list)); if (dev->worker) { @@ -937,9 +940,9 @@ static int set_bit_to_user(int nr, void __user *addr) if (r < 0) return r; BUG_ON(r != 1); - base = kmap_atomic(page, KM_USER0); + base = kmap_atomic(page); set_bit(bit, base); - kunmap_atomic(base, KM_USER0); + kunmap_atomic(base); set_page_dirty_lock(page); put_page(page); return 0; |