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/sync_gk20a.c b/drivers/gpu/nvgpu/gk20a/sync_gk20a.c
index deaf19a1..a8e824b6 100644
--- a/drivers/gpu/nvgpu/gk20a/sync_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/sync_gk20a.c
@@ -43,7 +43,7 @@ struct gk20a_sync_timeline {
  */
 struct gk20a_sync_pt {
         struct gk20a                    *g;
-        struct kref                     refcount;
+        struct nvgpu_ref                        refcount;
         u32                             thresh;
         struct nvgpu_semaphore          *sema;
         struct gk20a_sync_timeline      *obj;
@@ -170,7 +170,7 @@ static struct gk20a_sync_timeline *to_gk20a_timeline(struct sync_timeline *obj)
         return (struct gk20a_sync_timeline *)obj;
 }
 
-static void gk20a_sync_pt_free_shared(struct kref *ref)
+static void gk20a_sync_pt_free_shared(struct nvgpu_ref *ref)
 {
         struct gk20a_sync_pt *pt =
                 container_of(ref, struct gk20a_sync_pt, refcount);
@@ -192,7 +192,7 @@ static struct gk20a_sync_pt *gk20a_sync_pt_create_shared(
         if (!shared)
                 return NULL;
 
-        kref_init(&shared->refcount);
+        nvgpu_ref_init(&shared->refcount);
         shared->g = g;
         shared->obj = obj;
         shared->sema = sema;
@@ -229,7 +229,7 @@ static void gk20a_sync_pt_free_inst(struct sync_pt *sync_pt)
 {
         struct gk20a_sync_pt *pt = to_gk20a_sync_pt(sync_pt);
         if (pt)
-                kref_put(&pt->refcount, gk20a_sync_pt_free_shared);
+                nvgpu_ref_put(&pt->refcount, gk20a_sync_pt_free_shared);
 }
 
 static struct sync_pt *gk20a_sync_pt_dup_inst(struct sync_pt *sync_pt)
@@ -242,7 +242,7 @@ static struct sync_pt *gk20a_sync_pt_dup_inst(struct sync_pt *sync_pt)
         if (!pti)
                 return NULL;
         pti->shared = pt;
-        kref_get(&pt->refcount);
+        nvgpu_ref_get(&pt->refcount);
         return &pti->pt;
 }