cdx: Create symbol namespaces for cdx subsystem

Create CDX_BUS and CDX_BUS_CONTROLLER symbol namespace for cdx bus
subsystem. CDX controller modules are required to import symbols from
CDX_BUS_CONTROLLER namespace and other than controller modules to
import from CDX_BUS namespace.

Signed-off-by: Abhijit Gangurde <abhijit.gangurde@amd.com>
Link: https://lore.kernel.org/r/20231017160505.10640-4-abhijit.gangurde@amd.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/cdx/Makefile b/drivers/cdx/Makefile
index 0324e4914f6e2497cbe142f23fc7cae3bb7af73e..5d1ea482419f046e090f22ec81b37e3d0c237651 100644 (file)
--- a/drivers/cdx/Makefile
+++ b/drivers/cdx/Makefile
@@ -5,4 +5,6 @@
 # Copyright (C) 2022-2023, Advanced Micro Devices, Inc.
 #
 
+ccflags-y += -DDEFAULT_SYMBOL_NAMESPACE=CDX_BUS
+
 obj-$(CONFIG_CDX_BUS) += cdx.o controller/

diff --git a/drivers/cdx/cdx.c b/drivers/cdx/cdx.c
index 75760388f5e7edf5a8e3957df0f3cbe368016d03..ee0913f047588846ba55c7334cb83c1c264b12c1 100644 (file)
--- a/drivers/cdx/cdx.c
+++ b/drivers/cdx/cdx.c
@@ -530,7 +530,7 @@ fail:
 
        return ret;
 }
-EXPORT_SYMBOL_GPL(cdx_device_add);
+EXPORT_SYMBOL_NS_GPL(cdx_device_add, CDX_BUS_CONTROLLER);
 
 int cdx_register_controller(struct cdx_controller *cdx)
 {
@@ -555,7 +555,7 @@ int cdx_register_controller(struct cdx_controller *cdx)
 
        return 0;
 }
-EXPORT_SYMBOL_GPL(cdx_register_controller);
+EXPORT_SYMBOL_NS_GPL(cdx_register_controller, CDX_BUS_CONTROLLER);
 
 void cdx_unregister_controller(struct cdx_controller *cdx)
 {
@@ -570,7 +570,7 @@ void cdx_unregister_controller(struct cdx_controller *cdx)
 
        mutex_unlock(&cdx_controller_lock);
 }
-EXPORT_SYMBOL_GPL(cdx_unregister_controller);
+EXPORT_SYMBOL_NS_GPL(cdx_unregister_controller, CDX_BUS_CONTROLLER);
 
 static int __init cdx_bus_init(void)
 {

diff --git a/drivers/cdx/controller/cdx_controller.c b/drivers/cdx/controller/cdx_controller.c
index bb4ae7970e215152b33ed050f141e02d3fc9a825..3f86663fbacf970581bf4af9976ced734f6c120d 100644 (file)
--- a/drivers/cdx/controller/cdx_controller.c
+++ b/drivers/cdx/controller/cdx_controller.c
@@ -229,3 +229,4 @@ module_exit(cdx_controller_exit);
 MODULE_AUTHOR("AMD Inc.");
 MODULE_DESCRIPTION("CDX controller for AMD devices");
 MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS(CDX_BUS_CONTROLLER);

diff --git a/drivers/vfio/cdx/main.c b/drivers/vfio/cdx/main.c
index de56686581ae4f7314aeb2aee5cc1a6af982fe01..b3e482fa717bf0804e1f5bafd3b3baaae82ed57d 100644 (file)
--- a/drivers/vfio/cdx/main.c
+++ b/drivers/vfio/cdx/main.c
@@ -231,3 +231,4 @@ module_driver(vfio_cdx_driver, cdx_driver_register, cdx_driver_unregister);
 
 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("VFIO for CDX devices - User Level meta-driver");
+MODULE_IMPORT_NS(CDX_BUS);