drivers: Fix MODULE_IMPORT_NS for Linux v6.13

In Linux v6.13, commit cdd30ebb1b9f ("module: Convert symbol namespace
to string literal") updated the MODULE_IMPORT_NS macro to take a string
literal as an argument in Linux v6.13. Use conftest to detect if
MODULE_IMPORT_NS takes a string literal as an argument and update the
various drivers accordingly.

Bug 4991705

Change-Id: I8f34860648965dc2334e2916d5404522510778ff
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3263798
(cherry picked from commit 2e3d9e2ad27ffc6743ad1f0bca06b9a802182a7a)
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3499752
GVS: buildbot_gerritrpt <buildbot_gerritrpt@nvidia.com>
Tested-by: Brad Griffis <bgriffis@nvidia.com>

drivers/gpu/drm/tegra/gem.c

@@ -3,7 +3,7 @@
  * NVIDIA Tegra DRM GEM helper functions
  *
  * Copyright (C) 2012 Sascha Hauer, Pengutronix
- * Copyright (C) 2013-2023 NVIDIA CORPORATION, All rights reserved.
+ * Copyright (C) 2013-2024 NVIDIA CORPORATION, All rights reserved.
  *
  * Based on the GEM/CMA helpers
  *
@@ -24,7 +24,11 @@
 #include "drm.h"
 #include "gem.h"
 
+#if defined(NV_MODULE_IMPORT_NS_CALLS_STRINGIFY)
 MODULE_IMPORT_NS(DMA_BUF);
+#else
+MODULE_IMPORT_NS("DMA_BUF");
+#endif
 
 static unsigned int sg_dma_count_chunks(struct scatterlist *sgl, unsigned int nents)
 {

drivers/media/platform/tegra/camera/fusa-capture/capture-vi.c

@@ -1762,6 +1762,10 @@ static void __exit capture_vi_exit(void)
 module_init(capture_vi_init);
 module_exit(capture_vi_exit);
 
+#if defined(NV_MODULE_IMPORT_NS_CALLS_STRINGIFY)
 MODULE_IMPORT_NS(DMA_BUF);
+#else
+MODULE_IMPORT_NS("DMA_BUF");
+#endif
 MODULE_DESCRIPTION("tegra fusa-capture driver");
 MODULE_LICENSE("GPL");

drivers/misc/mods/mods_dmabuf.c

@@ -8,7 +8,11 @@
 
 #include "mods_internal.h"
 
+#if defined(NV_MODULE_IMPORT_NS_CALLS_STRINGIFY)
 MODULE_IMPORT_NS(DMA_BUF);
+#else
+MODULE_IMPORT_NS("DMA_BUF");
+#endif
 
 static struct device *dummy_device;
 

drivers/misc/nvscic2c-pcie/vmap-pin.c

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-only
-// Copyright (c) 2022-2023, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+// SPDX-FileCopyrightText: Copyright (c) 2022-2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 
 #define pr_fmt(fmt)	"nvscic2c-pcie: vmap-pin: " fmt
 
@@ -380,4 +380,8 @@ err:
 	return ret;
 }
 
+#if defined(NV_MODULE_IMPORT_NS_CALLS_STRINGIFY)
 MODULE_IMPORT_NS(DMA_BUF);
+#else
+MODULE_IMPORT_NS("DMA_BUF");
+#endif

drivers/platform/tegra/tegra-fsicom.c

@@ -489,7 +489,11 @@ static struct platform_driver fsicom_client = {
 
 module_platform_driver(fsicom_client);
 
+#if defined(NV_MODULE_IMPORT_NS_CALLS_STRINGIFY)
 MODULE_IMPORT_NS(DMA_BUF);
+#else
+MODULE_IMPORT_NS("DMA_BUF");
+#endif
 MODULE_DESCRIPTION("FSI-CCPLEX-COM driver");
 MODULE_AUTHOR("Prashant Shaw <pshaw@nvidia.com>");
 MODULE_LICENSE("GPL v2");

drivers/video/tegra/host/nvdla/nvdla.c

@@ -1589,6 +1589,10 @@ static void __exit nvdla_exit(void)
 module_exit(nvdla_exit);
 #endif
 
+#if defined(NV_MODULE_IMPORT_NS_CALLS_STRINGIFY)
 MODULE_IMPORT_NS(DMA_BUF);
+#else
+MODULE_IMPORT_NS("DMA_BUF");
+#endif
 MODULE_AUTHOR("Shridhar Rasal <srasal@nvidia.com>");
 MODULE_LICENSE("GPL v2");

drivers/video/tegra/host/pva/pva.c

@@ -1800,5 +1800,9 @@ static void __exit nvpva_exit(void)
 module_exit(nvpva_exit);
 #endif
 
+#if defined(NV_MODULE_IMPORT_NS_CALLS_STRINGIFY)
 MODULE_IMPORT_NS(DMA_BUF);
+#else
+MODULE_IMPORT_NS("DMA_BUF");
+#endif
 MODULE_LICENSE("GPL v2");

drivers/video/tegra/nvmap/nvmap_init.c

@@ -1068,7 +1068,11 @@ static void __exit nvmap_exit_driver(void)
 	nvmap_dev = NULL;
 }
 module_exit(nvmap_exit_driver);
+#if defined(NV_MODULE_IMPORT_NS_CALLS_STRINGIFY)
 MODULE_IMPORT_NS(DMA_BUF);
+#else
+MODULE_IMPORT_NS("DMA_BUF");
+#endif
 MODULE_DESCRIPTION("NvMap: Nvidia Tegra Memory Management Driver");
 MODULE_AUTHOR("Puneet Saxena <puneets@nvidia.com>");
 MODULE_LICENSE("GPL v2");

scripts/conftest/Makefile

@@ -149,6 +149,7 @@ NV_CONFTEST_FUNCTION_COMPILE_TESTS += media_entity_remote_pad
 NV_CONFTEST_FUNCTION_COMPILE_TESTS += mm_struct_struct_has_percpu_counter_rss_stat
 NV_CONFTEST_FUNCTION_COMPILE_TESTS += mii_bus_struct_has_read_c45
 NV_CONFTEST_FUNCTION_COMPILE_TESTS += mii_bus_struct_has_write_c45
+NV_CONFTEST_FUNCTION_COMPILE_TESTS += module_import_ns_calls_stringify
 NV_CONFTEST_FUNCTION_COMPILE_TESTS += netif_set_tso_max_size
 NV_CONFTEST_FUNCTION_COMPILE_TESTS += netif_napi_add_weight
 NV_CONFTEST_FUNCTION_COMPILE_TESTS += no_llseek

scripts/conftest/conftest.sh

@@ -7619,6 +7619,24 @@ compile_test() {
             compile_check_conftest "$CODE" "NV_MM_STRUCT_STRUCT_HAS_PERCPU_COUNTER_RSS_STAT" "" "types"
         ;;
 
+        module_import_ns_calls_stringify)
+           #
+           # Determine if the MODULE_IMPORT_NS macro takes a string literal as
+           # an argument.
+           #
+           # Commit cdd30ebb1b9f ("module: Convert symbol namespace to string
+           # literal") updated the symbol namespace macros to take a string
+           # literal as an argument and removes the call to __stringify from
+           # within the macro for Linux v6.13.
+           #
+           CODE="
+           #include <linux/module.h>
+           MODULE_IMPORT_NS(DMA_BUF);
+           "
+
+           compile_check_conftest "$CODE" "NV_MODULE_IMPORT_NS_CALLS_STRINGIFY" "" "types"
+        ;;
+
         no_llseek)
             #
             # Determine if the function no_llseek() is present.