linux-kernel - Re: [PATCH v4 00/48] Refactor perf cpumap

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Date:   Mon, 10 Jan 2022 17:42:35 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Ian Rogers <irogers@...gle.com>
Cc:     Andi Kleen <ak@...ux.intel.com>, Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        John Garry <john.garry@...wei.com>,
        Kajol Jain <kjain@...ux.ibm.com>,
        "Paul A . Clarke" <pc@...ibm.com>,
        Riccardo Mancini <rickyman7@...il.com>,
        Kan Liang <kan.liang@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
        Vineet Singh <vineet.singh@...el.com>,
        James Clark <james.clark@....com>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Mike Leach <mike.leach@...aro.org>,
        Leo Yan <leo.yan@...aro.org>, coresight@...ts.linaro.org,
        linux-arm-kernel@...ts.infradead.org, zhengjun.xing@...el.com,
        eranian@...gle.com
Subject: Re: [PATCH v4 00/48] Refactor perf cpumap

Em Mon, Jan 10, 2022 at 05:40:12PM -0300, Arnaldo Carvalho de Melo escreveu:
> > I'm now making it go thru the container builds.
> 
> Not a good start, checking:
> 
> [perfbuilder@...e ~]$ time dm
>    1    50.25 almalinux:8                   : FAIL clang version 12.0.1 (Red Hat 12.0.1-4.module_el8.5.0+1025+93159d6c)
>     builtin-stat.c:1499:31: error: unused function 'perf_env__get_cpu' [-Werror,-Wunused-function]
>     static inline struct perf_cpu perf_env__get_cpu(void *data, struct perf_cpu_map *map, int idx)

                                   ^
Interesting, it builds with gcc, not with clang:

+ make PYTHON=python3 ARCH= CROSS_COMPILE= EXTRA_CFLAGS= -C tools/perf O=/tmp/build/perf CC=clang

And it really isn't used anywhere in builtin-stat.c, will remove it
after figuring out when it stops being used.

- Arnaldo

>     1 error generated.
>    2    54.14 alpine:3.4                    : FAIL clang version 3.8.0 (tags/RELEASE_380/final)
>     builtin-stat.c:1499:31: error: unused function 'perf_env__get_cpu' [-Werror,-Wunused-function]
>     static inline struct perf_cpu perf_env__get_cpu(void *data, struct perf_cpu_map *map, int idx)
>                                   ^
>     1 error generated.
>    3    39.78 alpine:3.5                    : FAIL clang version 3.8.1 (tags/RELEASE_381/final)
>     builtin-stat.c:1499:31: error: unused function 'perf_env__get_cpu' [-Werror,-Wunused-function]
>     static inline struct perf_cpu perf_env__get_cpu(void *data, struct perf_cpu_map *map, int idx)
>                                   ^
>     1 error generated.
>    4    82.52 alpine:3.6                    : FAIL clang version 4.0.0 (tags/RELEASE_400/final)
>     builtin-stat.c:1499:31: error: unused function 'perf_env__get_cpu' [-Werror,-Wunused-function]
>     static inline struct perf_cpu perf_env__get_cpu(void *data, struct perf_cpu_map *map, int idx)
>                                   ^
>     1 error generated.
>    5   113.61 alpine:3.7                    : FAIL gcc version 6.4.0 (Alpine 6.4.0)
>     builtin-stat.c:1499:31: error: unused function 'perf_env__get_cpu' [-Werror,-Wunused-function]
>     static inline struct perf_cpu perf_env__get_cpu(void *data, struct perf_cpu_map *map, int idx)
>                                   ^
>     1 error generated.
>    6   119.02 alpine:3.8                    : FAIL gcc version 6.4.0 (Alpine 6.4.0)
>     builtin-stat.c:1499:31: error: unused function 'perf_env__get_cpu' [-Werror,-Wunused-function]
>     static inline struct perf_cpu perf_env__get_cpu(void *data, struct perf_cpu_map *map, int idx)
>                                   ^
>     1 error generated.
>    7    64.55 alpine:3.9                    : FAIL gcc version 8.3.0 (Alpine 8.3.0)
>     builtin-stat.c:1499:31: error: unused function 'perf_env__get_cpu' [-Werror,-Wunused-function]
>     static inline struct perf_cpu perf_env__get_cpu(void *data, struct perf_cpu_map *map, int idx)
>                                   ^
>     1 error generated.
>    8: alpine:3.10

-- 

- Arnaldo