Subject: [PATCH v2] drm: import DMA_BUF module namespace

From: Marcel Ziswiler <[email-masked]>
Date: Wed, 27 Oct 2021 23:25:05 +0200

From: Marcel Ziswiler <[email-masked]>

Today's -next fails building arm64 defconfig as follows:

ERROR: modpost: module drm_cma_helper uses symbol dma_buf_vunmap from
 namespace DMA_BUF, but does not import it.
ERROR: modpost: module drm_cma_helper uses symbol dma_buf_vmap from
 namespace DMA_BUF, but does not import it.

Reported-by: Linux Kernel Functional Testing <[email-masked]>
Fixes: commit 4b2b5e142ff4 ("drm: Move GEM memory managers into modules")
Signed-off-by: Marcel Ziswiler <[email-masked]>

---

Changes in v2:
- After consulting the documentation move it to the bottom of the file
  where the other MODULE statements are as suggested by Thomas.
- Also move it down there for the drm_gem_shmem_helper.c file.

 drivers/gpu/drm/drm_gem_cma_helper.c   | 1 +
 drivers/gpu/drm/drm_gem_shmem_helper.c | 3 +--
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/drm_gem_cma_helper.c b/drivers/gpu/drm/drm_gem_cma_helper.c
index 6f7b3f8ec04d3..2a34241fee025 100644
--- a/drivers/gpu/drm/drm_gem_cma_helper.c
+++ b/drivers/gpu/drm/drm_gem_cma_helper.c
@@ -581,4 +581,5 @@ drm_gem_cma_prime_import_sg_table_vmap(struct drm_device *dev,
 EXPORT_SYMBOL(drm_gem_cma_prime_import_sg_table_vmap);
 
 MODULE_DESCRIPTION("DRM CMA memory-management helpers");
+MODULE_IMPORT_NS(DMA_BUF);
 MODULE_LICENSE("GPL");
diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c
index f7324582afe71..a5b743a83ce99 100644
--- a/drivers/gpu/drm/drm_gem_shmem_helper.c
+++ b/drivers/gpu/drm/drm_gem_shmem_helper.c
@@ -22,8 +22,6 @@
 #include <drm/drm_prime.h>
 #include <drm/drm_print.h>
 
-MODULE_IMPORT_NS(DMA_BUF);
-
 /**
  * DOC: overview
  *
@@ -779,4 +777,5 @@ drm_gem_shmem_prime_import_sg_table(struct drm_device *dev,
 EXPORT_SYMBOL_GPL(drm_gem_shmem_prime_import_sg_table);
 
 MODULE_DESCRIPTION("DRM SHMEM memory-management helpers");
+MODULE_IMPORT_NS(DMA_BUF);
 MODULE_LICENSE("GPL v2");
-- 
2.26.2