diff options
author | Asias He <asias@redhat.com> | 2013-05-07 14:54:36 +0800 |
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committer | Michael S. Tsirkin <mst@redhat.com> | 2013-07-11 15:38:40 +0300 |
commit | 22fa90c7fb479694d6affebc049d21f06b714be6 (patch) | |
tree | fd62ad11e27171f38d29470e5935736d835d3a4c /drivers/vhost/vhost.h | |
parent | e7802212ea4bbbd5db99181942a19ab36ca4b914 (diff) | |
download | talos-obmc-linux-22fa90c7fb479694d6affebc049d21f06b714be6.tar.gz talos-obmc-linux-22fa90c7fb479694d6affebc049d21f06b714be6.zip |
vhost: Remove custom vhost rcu usage
Now, vq->private_data is always accessed under vq mutex. No need to play
the vhost rcu trick.
Signed-off-by: Asias He <asias@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers/vhost/vhost.h')
-rw-r--r-- | drivers/vhost/vhost.h | 10 |
1 files changed, 2 insertions, 8 deletions
diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h index 42298cd23c73..4465ed5f316d 100644 --- a/drivers/vhost/vhost.h +++ b/drivers/vhost/vhost.h @@ -103,14 +103,8 @@ struct vhost_virtqueue { struct iovec iov[UIO_MAXIOV]; struct iovec *indirect; struct vring_used_elem *heads; - /* We use a kind of RCU to access private pointer. - * All readers access it from worker, which makes it possible to - * flush the vhost_work instead of synchronize_rcu. Therefore readers do - * not need to call rcu_read_lock/rcu_read_unlock: the beginning of - * vhost_work execution acts instead of rcu_read_lock() and the end of - * vhost_work execution acts instead of rcu_read_unlock(). - * Writers use virtqueue mutex. */ - void __rcu *private_data; + /* Protected by virtqueue mutex. */ + void *private_data; /* Log write descriptors */ void __user *log_base; struct vhost_log *log; |