[PATCH] dma-buf: remove trace_dma_fence_emit

[Christian König]

There was never any significant difference between trace_dma_fence_emit()
and trace_dma_fence_init() and the only place where it would made a
significant difference was never implemented.

So remove trace_dma_fence_emit() since we have an repeating issue that
people are trying to use it for visualization and are surprised that
it actually doesn't work for most drivers.

Signed-off-by: Christian König <christian.koenig at amd.com>
---
 drivers/dma-buf/dma-fence.c             | 1 -
 drivers/gpu/drm/nouveau/nouveau_fence.c | 1 -
 drivers/gpu/drm/qxl/qxl_release.c       | 1 -
 drivers/gpu/drm/virtio/virtgpu_fence.c  | 2 --
 include/trace/events/dma_fence.h        | 7 -------
 5 files changed, 12 deletions(-)

diff --git a/drivers/dma-buf/dma-fence.c b/drivers/dma-buf/dma-fence.c
index 066400ed8841..d0d704f3edae 100644
--- a/drivers/dma-buf/dma-fence.c
+++ b/drivers/dma-buf/dma-fence.c
@@ -20,7 +20,6 @@
 #define CREATE_TRACE_POINTS
 #include <trace/events/dma_fence.h>
 
-EXPORT_TRACEPOINT_SYMBOL(dma_fence_emit);
 EXPORT_TRACEPOINT_SYMBOL(dma_fence_enable_signal);
 EXPORT_TRACEPOINT_SYMBOL(dma_fence_signaled);
 
diff --git a/drivers/gpu/drm/nouveau/nouveau_fence.c b/drivers/gpu/drm/nouveau/nouveau_fence.c
index 7f01dcf81fab..abcac7db4347 100644
--- a/drivers/gpu/drm/nouveau/nouveau_fence.c
+++ b/drivers/gpu/drm/nouveau/nouveau_fence.c
@@ -224,7 +224,6 @@ nouveau_fence_emit(struct nouveau_fence *fence, struct nouveau_channel *chan)
 			       &fctx->lock, fctx->context, ++fctx->sequence);
 	kref_get(&fctx->fence_ref);
 
-	trace_dma_fence_emit(&fence->base);
 	ret = fctx->emit(fence);
 	if (!ret) {
 		dma_fence_get(&fence->base);
diff --git a/drivers/gpu/drm/qxl/qxl_release.c b/drivers/gpu/drm/qxl/qxl_release.c
index 368d26da0d6a..cb9f27771f32 100644
--- a/drivers/gpu/drm/qxl/qxl_release.c
+++ b/drivers/gpu/drm/qxl/qxl_release.c
@@ -424,7 +424,6 @@ void qxl_release_fence_buffer_objects(struct qxl_release *release)
 	 */
 	dma_fence_init(&release->base, &qxl_fence_ops, &qdev->release_lock,
 		       release->id | 0xf0000000, release->base.seqno);
-	trace_dma_fence_emit(&release->base);
 
 	list_for_each_entry(entry, &release->bos, head) {
 		bo = entry->bo;
diff --git a/drivers/gpu/drm/virtio/virtgpu_fence.c b/drivers/gpu/drm/virtio/virtgpu_fence.c
index f28357dbde35..e8b6dec37977 100644
--- a/drivers/gpu/drm/virtio/virtgpu_fence.c
+++ b/drivers/gpu/drm/virtio/virtgpu_fence.c
@@ -111,8 +111,6 @@ void virtio_gpu_fence_emit(struct virtio_gpu_device *vgdev,
 	list_add_tail(&fence->node, &drv->fences);
 	spin_unlock_irqrestore(&drv->lock, irq_flags);
 
-	trace_dma_fence_emit(&fence->f);
-
 	cmd_hdr->flags |= cpu_to_le32(VIRTIO_GPU_FLAG_FENCE);
 	cmd_hdr->fence_id = cpu_to_le64(fence->fence_id);
 
diff --git a/include/trace/events/dma_fence.h b/include/trace/events/dma_fence.h
index 3963e79ca7b4..eb744a6aca49 100644
--- a/include/trace/events/dma_fence.h
+++ b/include/trace/events/dma_fence.h
@@ -34,13 +34,6 @@ DECLARE_EVENT_CLASS(dma_fence,
 		  __entry->seqno)
 );
 
-DEFINE_EVENT(dma_fence, dma_fence_emit,
-
-	TP_PROTO(struct dma_fence *fence),
-
-	TP_ARGS(fence)
-);
-
 DEFINE_EVENT(dma_fence, dma_fence_init,
 
 	TP_PROTO(struct dma_fence *fence),
-- 
2.25.1