[PATCH V3 10/13] amdkfd: process pointer of a HIQ should be set to NULL

[Zhu Lingshan]

In kq_initialize, queue->process of a HIQ should
be set to NULL because it does not belong to any kfd_process.

This commit decommisions the function kfd_get_process() because
it can not locate a specific kfd_process among multiple
contexts and not any code path calls it after this commit.

Signed-off-by: Zhu Lingshan <lingshan....@amd.com>
---
 drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.c |  3 ++-
 drivers/gpu/drm/amd/amdkfd/kfd_priv.h         |  1 -
 drivers/gpu/drm/amd/amdkfd/kfd_process.c      | 18 ------------------
 3 files changed, 2 insertions(+), 20 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.c 
b/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.c
index 2b0a830f5b29..ebee37937783 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.c
@@ -144,7 +144,8 @@ static bool kq_initialize(struct kernel_queue *kq, struct 
kfd_node *dev,
                goto err_init_queue;
 
        kq->queue->device = dev;
-       kq->queue->process = kfd_get_process(current);
+       if (type == KFD_QUEUE_TYPE_HIQ)
+               kq->queue->process = NULL;
 
        kq->queue->mqd_mem_obj = kq->mqd_mgr->allocate_mqd(kq->mqd_mgr->dev,
                                        &kq->queue->properties);
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h 
b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
index d140463e221b..25534473c28f 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
@@ -1050,7 +1050,6 @@ void kfd_process_destroy_wq(void);
 void kfd_cleanup_processes(void);
 struct kfd_process *kfd_create_process(struct task_struct *thread);
 int kfd_create_process_sysfs(struct kfd_process *process);
-struct kfd_process *kfd_get_process(const struct task_struct *task);
 struct kfd_process *kfd_lookup_process_by_pasid(u32 pasid,
                                                 struct kfd_process_device 
**pdd);
 struct kfd_process *kfd_lookup_process_by_mm(const struct mm_struct *mm);
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process.c 
b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
index 8e498fd35b8c..0c3f0cc16bf4 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
@@ -989,24 +989,6 @@ struct kfd_process *kfd_create_process(struct task_struct 
*thread)
        return process;
 }
 
-struct kfd_process *kfd_get_process(const struct task_struct *thread)
-{
-       struct kfd_process *process;
-
-       if (!thread->mm)
-               return ERR_PTR(-EINVAL);
-
-       /* Only the pthreads threading model is supported. */
-       if (thread->group_leader->mm != thread->mm)
-               return ERR_PTR(-EINVAL);
-
-       process = find_process(thread, false);
-       if (!process)
-               return ERR_PTR(-EINVAL);
-
-       return process;
-}
-
 static struct kfd_process *find_process_by_mm(const struct mm_struct *mm)
 {
        struct kfd_process *process;
-- 
2.47.1