Re: [PATCH] tracing: Simplify conditional compilation code in tracing_set_tracer()

[Steven Rostedt]

On Thu,  2 Jun 2022 10:24:04 +0800
sunliming <sunliming@xxxxxxxxxx> wrote:

> Two conditional compilation directives "#ifdef CONFIG_TRACER_SNAPSHOT"
> are used consecutively, and no other code in between. Simplify conditional
> the compilation code and only use one "#ifdef CONFIG_TRACER_SNAPSHOT".

I think you mean CONFIG_TRACER_MAX_TRACE here.

-- Steve

> 
> Signed-off-by: sunliming <sunliming@xxxxxxxxxx>
> ---
>  kernel/trace/trace.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
> index f400800bc910..dc959e339512 100644
> --- a/kernel/trace/trace.c
> +++ b/kernel/trace/trace.c
> @@ -6430,9 +6430,7 @@ int tracing_set_tracer(struct trace_array *tr, const char *buf)
>  		synchronize_rcu();
>  		free_snapshot(tr);
>  	}
> -#endif
>  
> -#ifdef CONFIG_TRACER_MAX_TRACE
>  	if (t->use_max_tr && !had_max_tr) {
>  		ret = tracing_alloc_snapshot_instance(tr);
>  		if (ret < 0)