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authorJason Wang <jasowang@redhat.com>2013-06-18 09:04:23 +0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-06-18 22:14:18 +0400
commit35848f68b07df3f917cb13fc3c134718669f569b (patch)
tree6d098733bc0126ad5e133ff23d26caba0ed919e8 /drivers/hv/vmbus_drv.c
parent36dd68319c7b56a76ed450b0e470067b5d74b9b2 (diff)
downloadlinux-35848f68b07df3f917cb13fc3c134718669f569b.tar.xz
drivers: hv: switch to use mb() instead of smp_mb()
Even if guest were compiled without SMP support, it could not assume that host wasn't. So switch to use mb() instead of smp_mb() to force memory barriers for UP guest. Signed-off-by: Jason Wang <jasowang@redhat.com> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: stable <stable@vger.kernel.org> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hv/vmbus_drv.c')
-rw-r--r--drivers/hv/vmbus_drv.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index bf421e0efa1e..4004e54ef05d 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -434,7 +434,7 @@ static void vmbus_on_msg_dpc(unsigned long data)
* will not deliver any more messages since there is
* no empty slot
*/
- smp_mb();
+ mb();
if (msg->header.message_flags.msg_pending) {
/*