drm/amdkfd: Minor cleanups

These were missed previously when rebasing changes for upstreaming.

v2: Remove redundant sched_policy conditions

Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
index 78b5d61..9e4134c 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
@@ -507,6 +507,8 @@ struct kfd_process {
 	 * In any process, the thread that started main() is the lead
 	 * thread and outlives the rest.
 	 * It is here because amd_iommu_bind_pasid wants a task_struct.
+	 * It can also be used for safely getting a reference to the
+	 * mm_struct of the process.
 	 */
 	struct task_struct *lead_thread;