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

Thomas Zimmermann
2021-10-29T18:51:57Z

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Hi

Am 27.10.21 um 23:25 schrieb Marcel Ziswiler:
> From: Marcel Ziswiler <marcel.ziswiler@toradex.com>
>
> 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 <lkft@linaro.org>
> Fixes: commit 4b2b5e142ff4 ("drm: Move GEM memory managers into modules")
> Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>

I added this fix into drm-misc-next. Thanks!

However, I had to import linux-next while doing so. 'Git am' did a 3-way
merge, which may result in a conflict when the fix reaches linux-next
again. I also updated the commit description.

Best regards
Thomas

>
> ---
>
> 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");
>

--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer

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