[PATCH 2/8] sync_file: export some interfaces needed by drm sync objects.

[Daniel Vetter]

On Tue, Apr 04, 2017 at 02:27:27PM +1000, Dave Airlie wrote:
> From: Dave Airlie <airlied at redhat.com>
> 
> These are just alloc and fdget interfaces needed by the drm sync
> objects code.
> 
> Signed-off-by: Dave Airlie <airlied at redhat.com>

Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch>

> ---
>  drivers/dma-buf/sync_file.c | 21 +++++++++++++++++++--
>  include/linux/sync_file.h   |  3 ++-
>  2 files changed, 21 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/dma-buf/sync_file.c b/drivers/dma-buf/sync_file.c
> index b33af9d..153bf03 100644
> --- a/drivers/dma-buf/sync_file.c
> +++ b/drivers/dma-buf/sync_file.c
> @@ -46,7 +46,16 @@ int sync_file_validate_type_flags(uint32_t type, uint32_t flags)
>  }
>  EXPORT_SYMBOL(sync_file_validate_type_flags);
>  
> -static struct sync_file *sync_file_alloc(uint32_t type, uint32_t flags)
> +/**
> + * sync_file_alloc() - allocate an unfenced sync file
> + * @type: type of sync file object
> + * @flags: creation flags for sync file object
> + *
> + * Creates a sync_file.
> + * The sync_file can be released with fput(sync_file->file).
> + * Returns the sync_file or NULL in case of error.
> + */
> +struct sync_file *sync_file_alloc(uint32_t type, uint32_t flags)
>  {
>  	struct sync_file *sync_file;
>  	int ret;
> @@ -78,6 +87,7 @@ static struct sync_file *sync_file_alloc(uint32_t type, uint32_t flags)
>  	kfree(sync_file);
>  	return NULL;
>  }
> +EXPORT_SYMBOL(sync_file_alloc);
>  
>  static void fence_check_cb_func(struct dma_fence *f, struct dma_fence_cb *cb)
>  {
> @@ -118,7 +128,13 @@ struct sync_file *sync_file_create(struct dma_fence *fence,
>  }
>  EXPORT_SYMBOL(sync_file_create);
>  
> -static struct sync_file *sync_file_fdget(int fd)
> +/**
> + * sync_file_fdget - get a reference to the file and return sync_file.
> + * @fd - file descriptor pointing at a sync_file.
> + *
> + * Returns the corresponding sync_file object.
> + */
> +struct sync_file *sync_file_fdget(int fd)
>  {
>  	struct file *file = fget(fd);
>  
> @@ -134,6 +150,7 @@ static struct sync_file *sync_file_fdget(int fd)
>  	fput(file);
>  	return NULL;
>  }
> +EXPORT_SYMBOL(sync_file_fdget);
>  
>  /**
>   * sync_file_get_fence - get the fence related to the sync_file fd
> diff --git a/include/linux/sync_file.h b/include/linux/sync_file.h
> index ede4182..e683dd1 100644
> --- a/include/linux/sync_file.h
> +++ b/include/linux/sync_file.h
> @@ -54,7 +54,8 @@ struct sync_file {
>  #define POLL_ENABLED DMA_FENCE_FLAG_USER_BITS
>  
>  int sync_file_validate_type_flags(uint32_t type, uint32_t flags);
> +struct sync_file *sync_file_alloc(uint32_t type, uint32_t flags);
>  struct sync_file *sync_file_create(struct dma_fence *fence, uint32_t type, uint32_t flags);
>  struct dma_fence *sync_file_get_fence(int fd);
> -
> +struct sync_file *sync_file_fdget(int fd);
>  #endif /* _LINUX_SYNC_H */
> -- 
> 2.9.3
> 
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> dri-devel at lists.freedesktop.org
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch