Some machines have an AHCI adapter, but no PCI. To be able to
compile hw/ide/ahci.c without CONFIG_PCI, we still need the two
functions msi_enabled() and msi_notify() for linking.
This is required for the new Kconfig-like build system, if a user
wants to compile a QEMU binary with just one machine that has AHCI,
but no PCI, like the ARM "cubieboard" for example.

Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
 hw/pci/pci-stub.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/hw/pci/pci-stub.c b/hw/pci/pci-stub.c
index b941a0e..c04a5df 100644
--- a/hw/pci/pci-stub.c
+++ b/hw/pci/pci-stub.c
@@ -53,3 +53,14 @@ uint16_t pci_requester_id(PCIDevice *dev)
     g_assert(false);
     return 0;
 }
+
+/* Required by ahci.c */
+bool msi_enabled(const PCIDevice *dev)
+{
+    return false;
+}
+
+void msi_notify(PCIDevice *dev, unsigned int vector)
+{
+    g_assert_not_reached();
+}
-- 
1.8.3.1