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, 5 insertions, 5 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/fence_gk20a.c b/drivers/gpu/nvgpu/gk20a/fence_gk20a.c
index a7250b17..fdfef3da 100644
--- a/drivers/gpu/nvgpu/gk20a/fence_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/fence_gk20a.c
@@ -33,10 +33,10 @@
 struct gk20a_fence_ops {
         int (*wait)(struct gk20a_fence *, long timeout);
         bool (*is_expired)(struct gk20a_fence *);
-        void *(*free)(struct kref *);
+        void *(*free)(struct nvgpu_ref *);
 };
 
-static void gk20a_fence_free(struct kref *ref)
+static void gk20a_fence_free(struct nvgpu_ref *ref)
 {
         struct gk20a_fence *f =
                 container_of(ref, struct gk20a_fence, ref);
@@ -59,13 +59,13 @@ static void gk20a_fence_free(struct kref *ref)
 void gk20a_fence_put(struct gk20a_fence *f)
 {
         if (f)
-                kref_put(&f->ref, gk20a_fence_free);
+                nvgpu_ref_put(&f->ref, gk20a_fence_free);
 }
 
 struct gk20a_fence *gk20a_fence_get(struct gk20a_fence *f)
 {
         if (f)
-                kref_get(&f->ref);
+                nvgpu_ref_get(&f->ref);
         return f;
 }
 
@@ -175,7 +175,7 @@ struct gk20a_fence *gk20a_alloc_fence(struct channel_gk20a *c)
                 fence = nvgpu_kzalloc(c->g, sizeof(struct gk20a_fence));
 
         if (fence) {
-                kref_init(&fence->ref);
+                nvgpu_ref_init(&fence->ref);
                 fence->g = c->g;
         }