linux-kernel - Re: [PATCH v3 13/13] coresight: trace-id: Add debug & test macros to Trace ID allocation

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Message-ID: <231e1e51-ab6c-2084-bb97-0594eb5fcbad@arm.com>
Date:   Mon, 3 Oct 2022 12:06:49 +0100
From:   Suzuki K Poulose <suzuki.poulose@....com>
To:     Mike Leach <mike.leach@...aro.org>, coresight@...ts.linaro.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     mathieu.poirier@...aro.org, peterz@...radead.org, mingo@...hat.com,
        acme@...nel.org, linux-perf-users@...r.kernel.org,
        leo.yan@...aro.org, quic_jinlmao@...cinc.com
Subject: Re: [PATCH v3 13/13] coresight: trace-id: Add debug & test macros to
 Trace ID allocation

On 09/08/2022 23:34, Mike Leach wrote:
> Adds in a number of pr_debug macros to allow the debugging and test of
> the trace ID allocation system.
> 
> Signed-off-by: Mike Leach <mike.leach@...aro.org>
> ---
>   .../hwtracing/coresight/coresight-trace-id.c  | 36 +++++++++++++++++++
>   1 file changed, 36 insertions(+)
> 
> diff --git a/drivers/hwtracing/coresight/coresight-trace-id.c b/drivers/hwtracing/coresight/coresight-trace-id.c
> index ac9092896dec..24c19ff493a9 100644
> --- a/drivers/hwtracing/coresight/coresight-trace-id.c
> +++ b/drivers/hwtracing/coresight/coresight-trace-id.c
> @@ -69,6 +69,30 @@ static void coresight_trace_id_set_pend_rel(int id, struct coresight_trace_id_ma
>   	set_bit(id, id_map->pend_rel_ids);
>   }
>   
> +/* #define TRACE_ID_DEBUG 1 */
> +#ifdef TRACE_ID_DEBUG
> +static char page_buf[PAGE_SIZE];
> +
> +static void coresight_trace_id_dump_table(struct coresight_trace_id_map *id_map,
> +					  const char *func_name)
> +{
> +	pr_debug("%s id_map::\n", func_name);
> +	bitmap_print_to_pagebuf(0, page_buf, id_map->used_ids, CORESIGHT_TRACE_IDS_MAX);
> +	pr_debug("Avial= %s\n", page_buf);

Could we not use %pb directly and skip the bitmap_print_to_pagebuf  ?

Suzuki