ARM: amba: Allow some ARM_AMBA users to compile with COMPILE_TEST

CONFIG_VFIO_AMBA has a light use of AMBA, adding some inline fallbacks
when AMBA is disabled will allow it to be compiled under COMPILE_TEST and
make VFIO easier to maintain.

Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Message-Id: <3-v1-df057e0f92c3+91-vfio_arm_compile_test_jgg@nvidia.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>

diff --git a/drivers/vfio/platform/Kconfig b/drivers/vfio/platform/Kconfig
index 233efde..ab34110 100644 (file)
--- a/drivers/vfio/platform/Kconfig
+++ b/drivers/vfio/platform/Kconfig
@@ -12,7 +12,7 @@ config VFIO_PLATFORM
 
 config VFIO_AMBA
        tristate "VFIO support for AMBA devices"
-       depends on VFIO_PLATFORM && ARM_AMBA
+       depends on VFIO_PLATFORM && (ARM_AMBA || COMPILE_TEST)
        help
          Support for ARM AMBA devices with VFIO. This is required to make
          use of ARM AMBA devices present on the system using the VFIO

diff --git a/include/linux/amba/bus.h b/include/linux/amba/bus.h
index 6cc93ab..c68d87b 100644 (file)
--- a/include/linux/amba/bus.h
+++ b/include/linux/amba/bus.h
@@ -105,8 +105,19 @@ extern struct bus_type amba_bustype;
 #define amba_get_drvdata(d)    dev_get_drvdata(&d->dev)
 #define amba_set_drvdata(d,p)  dev_set_drvdata(&d->dev, p)
 
+#ifdef CONFIG_ARM_AMBA
 int amba_driver_register(struct amba_driver *);
 void amba_driver_unregister(struct amba_driver *);
+#else
+static inline int amba_driver_register(struct amba_driver *drv)
+{
+       return -EINVAL;
+}
+static inline void amba_driver_unregister(struct amba_driver *drv)
+{
+}
+#endif
+
 struct amba_device *amba_device_alloc(const char *, resource_size_t, size_t);
 void amba_device_put(struct amba_device *);
 int amba_device_add(struct amba_device *, struct resource *);