New helper: deactivate_locked_super()

[safe/jmp/linux-2.6] / include / linux / virtio_pci.h

diff --git a/include/linux/virtio_pci.h b/include/linux/virtio_pci.h
index e13d7eb..cd0fd5d 100644 (file)
--- a/include/linux/virtio_pci.h
+++ b/include/linux/virtio_pci.h
@@ -57,4 +57,8 @@
 /* How many bits to shift physical queue address written to QUEUE_PFN.
  * 12 is historical, and due to x86 page size. */
 #define VIRTIO_PCI_QUEUE_ADDR_SHIFT    12
+
+/* The alignment to use between consumer and producer parts of vring.
+ * x86 pagesize again. */
+#define VIRTIO_PCI_VRING_ALIGN         4096
 #endif