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virtio-balloon: kzalloc the vb struct

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Zero all the vb fields at alloaction, so that we don't need to
zero-initialize each field one by one later.

Signed-off-by: Wei Wang <wei.w.wang@intel.com>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Wei Wang 2018-08-16 15:50:57 +08:00 committed by Michael S. Tsirkin
parent 74cf5b169c
commit c51d8fca0c
1 changed files with 1 additions and 4 deletions
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5
drivers/virtio/virtio_balloon.c
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@ -561,7 +561,7 @@ static int virtballoon_probe(struct virtio_device *vdev)
return -EINVAL;
}
vdev->priv = vb = kmalloc(sizeof(*vb), GFP_KERNEL);
vdev->priv = vb = kzalloc(sizeof(*vb), GFP_KERNEL);
if (!vb) {
err = -ENOMEM;
goto out;
@ -570,8 +570,6 @@ static int virtballoon_probe(struct virtio_device *vdev)
INIT_WORK(&vb->update_balloon_stats_work, update_balloon_stats_func);
INIT_WORK(&vb->update_balloon_size_work, update_balloon_size_func);
spin_lock_init(&vb->stop_update_lock);
vb->stop_update = false;
vb->num_pages = 0;
mutex_init(&vb->balloon_lock);
init_waitqueue_head(&vb->acked);
vb->vdev = vdev;
@ -602,7 +600,6 @@ static int virtballoon_probe(struct virtio_device *vdev)
err = PTR_ERR(vb->vb_dev_info.inode);
kern_unmount(balloon_mnt);
unregister_oom_notifier(&vb->nb);
vb->vb_dev_info.inode = NULL;
goto out_del_vqs;
}
vb->vb_dev_info.inode->i_mapping->a_ops = &balloon_aops;