9p: use struct mutex instead of struct semaphore
Replace semaphores protecting use flags with a mutex.
Signed-off-by: Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
Acked-by: Eric Van Hensbergen <ericvh@gmail.com>
diff --git a/net/9p/trans_virtio.c b/net/9p/trans_virtio.c
index 0bab1f2..d23ed60 100644
--- a/net/9p/trans_virtio.c
+++ b/net/9p/trans_virtio.c
@@ -49,7 +49,7 @@
#define VIRTQUEUE_NUM 128
/* a single mutex to manage channel initialization and attachment */
-static DECLARE_MUTEX(virtio_9p_lock);
+static DEFINE_MUTEX(virtio_9p_lock);
/* global which tracks highest initialized channel */
static int chan_index;
@@ -211,9 +211,9 @@
chan->max_tag = 0;
spin_unlock_irqrestore(&chan->lock, flags);
- down(&virtio_9p_lock);
+ mutex_lock(&virtio_9p_lock);
chan->inuse = false;
- up(&virtio_9p_lock);
+ mutex_unlock(&virtio_9p_lock);
kfree(trans);
}
@@ -381,10 +381,10 @@
struct virtio_chan *chan;
int index;
- down(&virtio_9p_lock);
+ mutex_lock(&virtio_9p_lock);
index = chan_index++;
chan = &channels[index];
- up(&virtio_9p_lock);
+ mutex_unlock(&virtio_9p_lock);
if (chan_index > MAX_9P_CHAN) {
printk(KERN_ERR "9p: virtio: Maximum channels exceeded\n");
@@ -413,9 +413,9 @@
out_free_vq:
vdev->config->del_vq(chan->vq);
fail:
- down(&virtio_9p_lock);
+ mutex_lock(&virtio_9p_lock);
chan_index--;
- up(&virtio_9p_lock);
+ mutex_unlock(&virtio_9p_lock);
return err;
}
@@ -449,7 +449,7 @@
struct virtio_chan *chan = channels;
int index = 0;
- down(&virtio_9p_lock);
+ mutex_lock(&virtio_9p_lock);
while (index < MAX_9P_CHAN) {
if (chan->initialized && !chan->inuse) {
chan->inuse = true;
@@ -459,7 +459,7 @@
chan = &channels[index];
}
}
- up(&virtio_9p_lock);
+ mutex_unlock(&virtio_9p_lock);
if (index >= MAX_9P_CHAN) {
printk(KERN_ERR "9p: no channels available\n");