gpu: nvgpu: Replace kref for refcounting in nvgpu

- added wrapper struct nvgpu_ref over nvgpu_atomic_t
- added nvgpu_ref_* APIs to access the above struct

JIRA NVGPU-140

Change-Id: Id47f897995dd4721751f7610b6d4d4fbfe4d6b9a
Signed-off-by: Debarshi Dutta <ddutta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1540899
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: svccoveritychecker <svccoveritychecker@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/tsg_gk20a.h b/drivers/gpu/nvgpu/gk20a/tsg_gk20a.h
index 40e12105..9195d3d3 100644
--- a/drivers/gpu/nvgpu/gk20a/tsg_gk20a.h
+++ b/drivers/gpu/nvgpu/gk20a/tsg_gk20a.h
@@ -25,7 +25,7 @@ struct channel_gk20a;
 
 bool gk20a_is_channel_marked_as_tsg(struct channel_gk20a *ch);
 struct tsg_gk20a *gk20a_tsg_open(struct gk20a *g);
-void gk20a_tsg_release(struct kref *ref);
+void gk20a_tsg_release(struct nvgpu_ref *ref);
 
 int gk20a_init_tsg_support(struct gk20a *g, u32 tsgid);
 struct tsg_gk20a *tsg_gk20a_from_ch(struct channel_gk20a *ch);
@@ -36,7 +36,7 @@ struct tsg_gk20a {
         bool in_use;
         int tsgid;
 
-        struct kref refcount;
+        struct nvgpu_ref refcount;
 
         struct nvgpu_list_node ch_list;
         int num_active_channels;