linux-kernel - Re: [PATCH 2/2] perf annotate: Add error log in symbol_

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Date:   Mon, 26 Jul 2021 16:19:26 +0100
From:   James Clark <james.clark@....com>
To:     Li Huafei <lihuafei1@...wei.com>, acme@...nel.org, jolsa@...nel.org
Cc:     peterz@...radead.org, mark.rutland@....com, mingo@...hat.com,
        alexander.shishkin@...ux.intel.com, namhyung@...nel.org,
        mliska@...e.cz, irogers@...gle.com, dzhu@...ecomp.com,
        rickyman7@...il.com, yao.jin@...ux.intel.com,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
        zhangjinhao2@...wei.com
Subject: Re: [PATCH 2/2] perf annotate: Add error log in symbol__annotate()



On 26/07/2021 13:38, Li Huafei wrote:
> When users use the perf annotate feature on unsupported machines, error
> logs should be printed for user feedback.
> 
> Signed-off-by: Li Huafei <lihuafei1@...wei.com>
> ---
>  tools/perf/util/annotate.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
> index aa04a3655236..cb280de3369f 100644
> --- a/tools/perf/util/annotate.c
> +++ b/tools/perf/util/annotate.c
> @@ -2192,8 +2192,10 @@ int symbol__annotate(struct map_symbol *ms, struct evsel *evsel,
>  		return errno;
>  
>  	args.arch = arch = arch__find(arch_name);
> -	if (arch == NULL)
> +	if (arch == NULL) {
> +		pr_err("%s: unsupported arch %s\n", __func__, arch_name);
>  		return ENOTSUP;
> +	}
>  
>  	if (parch)
>  		*parch = arch;
> 

This one is missing the v2 in the summary so it doesn't work with tools like b4,
but I applied it manually and it works.

Reviewed-by: James Clark <james.clark@....com>