Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6:
vhost: fix barrier pairing
+6
-1
+6
-1
drivers/vhost/vhost.c
+6
-1
drivers/vhost/vhost.c
···
1035
1035
/* This actually signals the guest, using eventfd. */
1036
1036
void vhost_signal(struct vhost_dev *dev, struct vhost_virtqueue *vq)
1037
1037
{
1038
-
__u16 flags = 0;
1038
+
__u16 flags;
1039
+
/* Flush out used index updates. This is paired
1040
+
* with the barrier that the Guest executes when enabling
1041
+
* interrupts. */
1042
+
smp_mb();
1043
+
1039
1044
if (get_user(flags, &vq->avail->flags)) {
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1045
vq_err(vq, "Failed to get flags");
1041
1046
return;