Subject: Re: linux-next: build failure after merge of the char-misc tree

From: Greg KH <[email-masked]>
Date: Wed, 27 Oct 2021 08:51:36 +0200

On Wed, Oct 27, 2021 at 03:48:43PM +1100, Stephen Rothwell wrote:
> Hi all,
> 
> After merging the char-misc tree, today's linux-next build (arm
> multi_v7_defconfig) failed like this:
> 
> ERROR: modpost: module drm_shmem_helper uses symbol dma_buf_vunmap from namespace DMA_BUF, but does not import it.
> ERROR: modpost: module drm_shmem_helper uses symbol dma_buf_mmap from namespace DMA_BUF, but does not import it.
> ERROR: modpost: module drm_shmem_helper uses symbol dma_buf_vmap from namespace DMA_BUF, but does not import it.
> 
> Caused by commit
> 
>   16b0314aa746 ("dma-buf: move dma-buf symbols into the DMA_BUF module namespace")
> 
> I have applied the following patch for today.
> 
> From: Stephen Rothwell <[email-masked]>
> Date: Wed, 27 Oct 2021 15:44:18 +1100
> Subject: [PATCH] fix for "dma-buf: move dma-buf symbols into the DMA_BUF
>  module namespace"
> 
> Signed-off-by: Stephen Rothwell <[email-masked]>
> ---
>  drivers/gpu/drm/drm_gem_shmem_helper.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c
> index 57ceecb3f4d8..f7324582afe7 100644
> --- a/drivers/gpu/drm/drm_gem_shmem_helper.c
> +++ b/drivers/gpu/drm/drm_gem_shmem_helper.c
> @@ -22,6 +22,8 @@
>  #include <drm/drm_prime.h>
>  #include <drm/drm_print.h>
>  
> +MODULE_IMPORT_NS(DMA_BUF);
> +
>  /**
>   * DOC: overview
>   *
> -- 
> 2.33.0
> 
> -- 
> Cheers,
> Stephen Rothwell

Looks good, I'll go apply this to my tree to keep things building
properly.

greg k-h