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, 8 insertions, 8 deletions

diff --git a/drivers/gpu/nvgpu/common/semaphore.c b/drivers/gpu/nvgpu/common/semaphore.c
index ac45aaaa..5496f5ec 100644
--- a/drivers/gpu/nvgpu/common/semaphore.c
+++ b/drivers/gpu/nvgpu/common/semaphore.c
@@ -156,7 +156,7 @@ struct nvgpu_semaphore_pool *nvgpu_semaphore_pool_alloc(
         p->sema_sea = sea;
         nvgpu_init_list_node(&p->hw_semas);
         nvgpu_init_list_node(&p->pool_list_entry);
-        kref_init(&p->ref);
+        nvgpu_ref_init(&p->ref);
 
         sea->page_count++;
         nvgpu_list_add(&p->pool_list_entry, &sea->pool_list);
@@ -285,7 +285,7 @@ void nvgpu_semaphore_pool_unmap(struct nvgpu_semaphore_pool *p,
  * Completely free a semaphore_pool. You should make sure this pool is not
  * mapped otherwise there's going to be a memory leak.
  */
-static void nvgpu_semaphore_pool_free(struct kref *ref)
+static void nvgpu_semaphore_pool_free(struct nvgpu_ref *ref)
 {
         struct nvgpu_semaphore_pool *p =
                 container_of(ref, struct nvgpu_semaphore_pool, ref);
@@ -314,12 +314,12 @@ static void nvgpu_semaphore_pool_free(struct kref *ref)
 
 void nvgpu_semaphore_pool_get(struct nvgpu_semaphore_pool *p)
 {
-        kref_get(&p->ref);
+        nvgpu_ref_get(&p->ref);
 }
 
 void nvgpu_semaphore_pool_put(struct nvgpu_semaphore_pool *p)
 {
-        kref_put(&p->ref, nvgpu_semaphore_pool_free);
+        nvgpu_ref_put(&p->ref, nvgpu_semaphore_pool_free);
 }
 
 /*
@@ -423,7 +423,7 @@ struct nvgpu_semaphore *nvgpu_semaphore_alloc(struct channel_gk20a *ch)
         if (!s)
                 return NULL;
 
-        kref_init(&s->ref);
+        nvgpu_ref_init(&s->ref);
         s->hw_sema = ch->hw_sema;
         nvgpu_atomic_set(&s->value, 0);
 
@@ -438,7 +438,7 @@ struct nvgpu_semaphore *nvgpu_semaphore_alloc(struct channel_gk20a *ch)
         return s;
 }
 
-static void nvgpu_semaphore_free(struct kref *ref)
+static void nvgpu_semaphore_free(struct nvgpu_ref *ref)
 {
         struct nvgpu_semaphore *s =
                 container_of(ref, struct nvgpu_semaphore, ref);
@@ -450,10 +450,10 @@ static void nvgpu_semaphore_free(struct kref *ref)
 
 void nvgpu_semaphore_put(struct nvgpu_semaphore *s)
 {
-        kref_put(&s->ref, nvgpu_semaphore_free);
+        nvgpu_ref_put(&s->ref, nvgpu_semaphore_free);
 }
 
 void nvgpu_semaphore_get(struct nvgpu_semaphore *s)
 {
-        kref_get(&s->ref);
+        nvgpu_ref_get(&s->ref);
 }