Re: [PATCH] tracing/osnoise: set several trace_osnoise.c variables storage-class-specifier to static

[Google]

On Thu,  9 Mar 2023 10:04:14 -0500
Tom Rix <trix@xxxxxxxxxx> wrote:

> smatch reports several similar warnings
> kernel/trace/trace_osnoise.c:220:1: warning:
>   symbol '__pcpu_scope_per_cpu_osnoise_var' was not declared. Should it be static?
> kernel/trace/trace_osnoise.c:243:1: warning:
>   symbol '__pcpu_scope_per_cpu_timerlat_var' was not declared. Should it be static?
> kernel/trace/trace_osnoise.c:335:14: warning:
>   symbol 'interface_lock' was not declared. Should it be static?
> kernel/trace/trace_osnoise.c:2242:5: warning:
>   symbol 'timerlat_min_period' was not declared. Should it be static?
> kernel/trace/trace_osnoise.c:2243:5: warning:
>   symbol 'timerlat_max_period' was not declared. Should it be static?
> 
> These variables are only used in trace_osnoise.c, so it should be static
> 

Looks good to me.

Acked-by: Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>

Thanks!

> Signed-off-by: Tom Rix <trix@xxxxxxxxxx>
> ---
>  kernel/trace/trace_osnoise.c | 10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/kernel/trace/trace_osnoise.c b/kernel/trace/trace_osnoise.c
> index f68ca1e6460f..cf395d2e8775 100644
> --- a/kernel/trace/trace_osnoise.c
> +++ b/kernel/trace/trace_osnoise.c
> @@ -217,7 +217,7 @@ struct osnoise_variables {
>  /*
>   * Per-cpu runtime information.
>   */
> -DEFINE_PER_CPU(struct osnoise_variables, per_cpu_osnoise_var);
> +static DEFINE_PER_CPU(struct osnoise_variables, per_cpu_osnoise_var);
>  
>  /*
>   * this_cpu_osn_var - Return the per-cpu osnoise_variables on its relative CPU
> @@ -240,7 +240,7 @@ struct timerlat_variables {
>  	u64			count;
>  };
>  
> -DEFINE_PER_CPU(struct timerlat_variables, per_cpu_timerlat_var);
> +static DEFINE_PER_CPU(struct timerlat_variables, per_cpu_timerlat_var);
>  
>  /*
>   * this_cpu_tmr_var - Return the per-cpu timerlat_variables on its relative CPU
> @@ -332,7 +332,7 @@ struct timerlat_sample {
>  /*
>   * Protect the interface.
>   */
> -struct mutex interface_lock;
> +static struct mutex interface_lock;
>  
>  /*
>   * Tracer data.
> @@ -2239,8 +2239,8 @@ static struct trace_min_max_param osnoise_print_stack = {
>  /*
>   * osnoise/timerlat_period: min 100 us, max 1 s
>   */
> -u64 timerlat_min_period = 100;
> -u64 timerlat_max_period = 1000000;
> +static u64 timerlat_min_period = 100;
> +static u64 timerlat_max_period = 1000000;
>  static struct trace_min_max_param timerlat_period = {
>  	.lock	= &interface_lock,
>  	.val	= &osnoise_data.timerlat_period,
> -- 
> 2.27.0
> 


-- 
Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>