Re: tracing, dma-buf: Remove unused trace event dma_fence_annotate_wait_on

[Christian KÃnig]

Am 13.10.2017 um 16:06 schrieb Steven Rostedt:
> From: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx>
>
> 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.
>
> Signed-off-by: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx>

Reviewed-by: Christian KÃnig <christian.koenig@xxxxxxx>

> ---
> Index: linux-trace.git/drivers/dma-buf/dma-fence.c
> ===================================================================
> --- linux-trace.git.orig/drivers/dma-buf/dma-fence.c
> +++ linux-trace.git/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);
>   
> Index: linux-trace.git/include/trace/events/dma_fence.h
> ===================================================================
> --- linux-trace.git.orig/include/trace/events/dma_fence.h
> +++ linux-trace.git/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),
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