tracing, dma-buf: Remove unused trace event dma_fence_annotate_wait_on

Commit e941759c74 ("fence: dma-buf cross-device synchronization") added
trace event fence_annotate_wait_on, but never used it. It was renamed
to dma_fence_annotate_wait_on by commit f54d186700 ("dma-buf: Rename
struct fence to dma_fence") but still not used. As defined trace events
have data structures and functions created for them, it is a waste of
memory if they are not used. Remove the unused trace event.

Link: http://lkml.kernel.org/r/20171013100625.6c820059@gandalf.local.home

Reviewed-by: Christian König <christian.koenig@amd.com>
Acked-by: Sumit Semwal <sumit.semwal@linaro.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

drivers/dma-buf/dma-fence.c

@@ -27,7 +27,6 @@
 #define CREATE_TRACE_POINTS
 #include <trace/events/dma_fence.h>
 
-EXPORT_TRACEPOINT_SYMBOL(dma_fence_annotate_wait_on);
 EXPORT_TRACEPOINT_SYMBOL(dma_fence_emit);
 EXPORT_TRACEPOINT_SYMBOL(dma_fence_enable_signal);
 

include/trace/events/dma_fence.h

@@ -8,46 +8,6 @@
 
 struct dma_fence;
 
-TRACE_EVENT(dma_fence_annotate_wait_on,
-
-	/* fence: the fence waiting on f1, f1: the fence to be waited on. */
-	TP_PROTO(struct dma_fence *fence, struct dma_fence *f1),
-
-	TP_ARGS(fence, f1),
-
-	TP_STRUCT__entry(
-		__string(driver, fence->ops->get_driver_name(fence))
-		__string(timeline, fence->ops->get_timeline_name(fence))
-		__field(unsigned int, context)
-		__field(unsigned int, seqno)
-
-		__string(waiting_driver, f1->ops->get_driver_name(f1))
-		__string(waiting_timeline, f1->ops->get_timeline_name(f1))
-		__field(unsigned int, waiting_context)
-		__field(unsigned int, waiting_seqno)
-	),
-
-	TP_fast_assign(
-		__assign_str(driver, fence->ops->get_driver_name(fence))
-		__assign_str(timeline, fence->ops->get_timeline_name(fence))
-		__entry->context = fence->context;
-		__entry->seqno = fence->seqno;
-
-		__assign_str(waiting_driver, f1->ops->get_driver_name(f1))
-		__assign_str(waiting_timeline, f1->ops->get_timeline_name(f1))
-		__entry->waiting_context = f1->context;
-		__entry->waiting_seqno = f1->seqno;
-
-	),
-
-	TP_printk("driver=%s timeline=%s context=%u seqno=%u "	\
-		  "waits on driver=%s timeline=%s context=%u seqno=%u",
-		  __get_str(driver), __get_str(timeline), __entry->context,
-		  __entry->seqno,
-		  __get_str(waiting_driver), __get_str(waiting_timeline),
-		  __entry->waiting_context, __entry->waiting_seqno)
-);
-
 DECLARE_EVENT_CLASS(dma_fence,
 
 	TP_PROTO(struct dma_fence *fence),