Merge branch 'pci/controller/hyperv'

- Fix ring buffer size at 16KB (not 4 pages), which reduces memory usage by
  128KBytes with 64KB pages (Michael Kelley)

* pci/controller/hyperv:
  PCI: hv: Fix ring buffer size calculation

Author: bjorn-helgaas

drivers/pci/controller/pci-hyperv.c

@@ -49,6 +49,7 @@
 #include <linux/refcount.h>
 #include <linux/irqdomain.h>
 #include <linux/acpi.h>
+#include <linux/sizes.h>
 #include <asm/mshyperv.h>
 
 /*
@@ -465,7 +466,7 @@ struct pci_eject_response {
 	u32 status;
 } __packed;
 
-static int pci_ring_size = (4 * PAGE_SIZE);
+static int pci_ring_size = VMBUS_RING_SIZE(SZ_16K);
 
 /*
  * Driver specific state.