Re: [PATCH] tracing/function-graph-tracer: strip ending newlines on comments

[Ingo Molnar <mingo@elte.hu>]

* Frederic Weisbecker <fweisbec@gmail.com> wrote:

> Impact: trivial output improvement
> 
> Ending newlines are appended automatically on comments by the function graph tracer
> because the newlines needs to be placed after the "*/" characters.
> So if the user puts an ending whitespace, we want to strip it.
> 
> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>

applied to tip/tracing/function-graph-tracer, thanks Frederic!

> @@ -584,6 +585,11 @@ print_graph_comment(struct print_entry *trace, struct trace_seq *s,
>  				return TRACE_TYPE_PARTIAL_LINE;
>  		}
>  
> +	/* Strip ending newline on the comment */
> +	len = strlen(trace->buf);
> +	if (trace->buf[len - 1] == '\n')
> +		trace->buf[len - 1] = '\0';
> +

Hm, dont we know the length of the buffer already, so that we could avoid 
the strlen() overhead?

	Ingo