video: tegra: nvmap: Export API for modules

Export nvmap_ref_to_id() so that external modules can use this
API. This is needed for in kernel unit testing of nvmap.

Change-Id: I342a2f8b8d31251ca853a3efd0647e897408e811
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: http://git-master/r/269694
Reviewed-by: Krishna Reddy <vdumpa@nvidia.com>
Tested-by: Krishna Reddy <vdumpa@nvidia.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/include/linux/nvmap.h b/include/linux/nvmap.h
index b5c69ab17..e6bf69ffc 100644
--- a/include/linux/nvmap.h
+++ b/include/linux/nvmap.h
@@ -53,6 +53,7 @@
 #define NVMAP_HANDLE_ZEROED_PAGES    (0x1ul << 5)
 
 struct nvmap_handle;
+struct nvmap_handle_ref;
 
 #if defined(__KERNEL__)
 
@@ -95,6 +96,8 @@ struct dma_buf *nvmap_dmabuf_export(struct nvmap_client *client, ulong user_id);
 
 struct dma_buf *nvmap_dmabuf_export_from_ref(struct nvmap_handle_ref *ref);
 
+ulong nvmap_ref_to_id(struct nvmap_handle_ref *ref);
+
 ulong nvmap_ref_to_user_id(struct nvmap_handle_ref *ref);
 
 ulong nvmap_dmabuf_to_user_id(struct dma_buf *dmabuf);