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| author | Stefan Hajnoczi <stefanha@redhat.com> | 2018-11-05 18:33:22 +0100 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2018-12-20 00:23:49 +0100 |
| commit | 6db3d8dc5d73b269987fae60745bb20eae97af61 (patch) | |
| tree | 049875c09693bc70b23dae2ce0dcb99127f74eec /drivers/vhost | |
| parent | virtio_blk: add discard and write zeroes support (diff) | |
| download | linux-6db3d8dc5d73b269987fae60745bb20eae97af61.tar.xz linux-6db3d8dc5d73b269987fae60745bb20eae97af61.zip | |
vhost/vsock: switch to a mutex for vhost_vsock_hash
Now that there are no more data path users of vhost_vsock_lock, it can
be turned into a mutex. It's only used by .release() and in the
.ioctl() path.
Depends-on: <20181105103547.22018-1-stefanha@redhat.com>
Suggested-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Diffstat (limited to 'drivers/vhost')
| -rw-r--r-- | drivers/vhost/vsock.c | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/drivers/vhost/vsock.c b/drivers/vhost/vsock.c index 98ed5be132c6..bc42d38ae031 100644 --- a/drivers/vhost/vsock.c +++ b/drivers/vhost/vsock.c @@ -27,14 +27,14 @@ enum { }; /* Used to track all the vhost_vsock instances on the system. */ -static DEFINE_SPINLOCK(vhost_vsock_lock); +static DEFINE_MUTEX(vhost_vsock_mutex); static DEFINE_READ_MOSTLY_HASHTABLE(vhost_vsock_hash, 8); struct vhost_vsock { struct vhost_dev dev; struct vhost_virtqueue vqs[2]; - /* Link to global vhost_vsock_hash, writes use vhost_vsock_lock */ + /* Link to global vhost_vsock_hash, writes use vhost_vsock_mutex */ struct hlist_node hash; struct vhost_work send_pkt_work; @@ -51,7 +51,7 @@ static u32 vhost_transport_get_local_cid(void) return VHOST_VSOCK_DEFAULT_HOST_CID; } -/* Callers that dereference the return value must hold vhost_vsock_lock or the +/* Callers that dereference the return value must hold vhost_vsock_mutex or the * RCU read lock. */ static struct vhost_vsock *vhost_vsock_get(u32 guest_cid) @@ -584,10 +584,10 @@ static int vhost_vsock_dev_release(struct inode *inode, struct file *file) { struct vhost_vsock *vsock = file->private_data; - spin_lock_bh(&vhost_vsock_lock); + mutex_lock(&vhost_vsock_mutex); if (vsock->guest_cid) hash_del_rcu(&vsock->hash); - spin_unlock_bh(&vhost_vsock_lock); + mutex_unlock(&vhost_vsock_mutex); /* Wait for other CPUs to finish using vsock */ synchronize_rcu(); @@ -631,10 +631,10 @@ static int vhost_vsock_set_cid(struct vhost_vsock *vsock, u64 guest_cid) return -EINVAL; /* Refuse if CID is already in use */ - spin_lock_bh(&vhost_vsock_lock); + mutex_lock(&vhost_vsock_mutex); other = vhost_vsock_get(guest_cid); if (other && other != vsock) { - spin_unlock_bh(&vhost_vsock_lock); + mutex_unlock(&vhost_vsock_mutex); return -EADDRINUSE; } @@ -643,7 +643,7 @@ static int vhost_vsock_set_cid(struct vhost_vsock *vsock, u64 guest_cid) vsock->guest_cid = guest_cid; hash_add_rcu(vhost_vsock_hash, &vsock->hash, guest_cid); - spin_unlock_bh(&vhost_vsock_lock); + mutex_unlock(&vhost_vsock_mutex); return 0; } |