linux-kernel - Re: [PATCH 5/7] perf pmu: Move pmu__find_core

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Message-ID: <ZQC7da2AM9ih8RMz@kernel.org>
Date:   Tue, 12 Sep 2023 16:26:45 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     James Clark <james.clark@....com>
Cc:     linux-perf-users@...r.kernel.org, irogers@...gle.com,
        John Garry <john.g.garry@...cle.com>,
        Will Deacon <will@...nel.org>,
        Mike Leach <mike.leach@...aro.org>,
        Leo Yan <leo.yan@...aro.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Kan Liang <kan.liang@...ux.intel.com>,
        Jing Zhang <renyu.zj@...ux.alibaba.com>,
        Haixin Yu <yuhaixin.yhx@...ux.alibaba.com>,
        Kajol Jain <kjain@...ux.ibm.com>,
        Ravi Bangoria <ravi.bangoria@....com>,
        Yang Jihong <yangjihong1@...wei.com>,
        Eduard Zingerman <eddyz87@...il.com>,
        Chen Zhongjin <chenzhongjin@...wei.com>,
        Miguel Ojeda <ojeda@...nel.org>,
        Liam Howlett <liam.howlett@...cle.com>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 5/7] perf pmu: Move pmu__find_core_pmu() to pmus.c

Em Thu, Aug 31, 2023 at 04:16:16PM +0100, James Clark escreveu:
> pmu__find_core_pmu() more logically belongs in pmus.c because it
> iterates over all PMUs, so move it to pmus.c
> 
> At the same time rename it to perf_pmus__find_core_pmu() to match the
> naming convention in this file.
> 
> Signed-off-by: James Clark <james.clark@....com>

So, this one is hitting this:

  CC      /tmp/build/perf-tools-next/util/expr.o
In file included from /var/home/acme/git/perf-tools-next/tools/include/linux/list.h:7,
                 from util/pmus.c:2:
In function ‘perf_pmus__scan_core’,
    inlined from ‘perf_pmus__find_core_pmu’ at util/pmus.c:601:16:
/var/home/acme/git/perf-tools-next/tools/include/linux/kernel.h:36:45: error: array subscript 0 is outside array bounds of ‘struct list_head[1]’ [-Werror=array-bounds]
   36 |         const typeof(((type *)0)->member) * __mptr = (ptr);     \
      |                                             ^~~~~~
/var/home/acme/git/perf-tools-next/tools/include/linux/list.h:352:9: note: in expansion of macro ‘container_of’
  352 |         container_of(ptr, type, member)
      |         ^~~~~~~~~~~~
/var/home/acme/git/perf-tools-next/tools/include/linux/list.h:404:9: note: in expansion of macro ‘list_entry’
  404 |         list_entry((pos)->member.next, typeof(*(pos)), member)
      |         ^~~~~~~~~~
/var/home/acme/git/perf-tools-next/tools/include/linux/list.h:494:20: note: in expansion of macro ‘list_next_entry’
  494 |         for (pos = list_next_entry(pos, member);                        \
      |                    ^~~~~~~~~~~~~~~
util/pmus.c:274:9: note: in expansion of macro ‘list_for_each_entry_continue’
  274 |         list_for_each_entry_continue(pmu, &core_pmus, list)
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
util/pmus.c: In function ‘perf_pmus__find_core_pmu’:
util/pmus.c:35:18: note: at offset -128 into object ‘core_pmus’ of size 16
   35 | static LIST_HEAD(core_pmus);
      |                  ^~~~~~~~~
/var/home/acme/git/perf-tools-next/tools/include/linux/list.h:23:26: note: in definition of macro ‘LIST_HEAD’
   23 |         struct list_head name = LIST_HEAD_INIT(name)
      |                          ^~~~
cc1: all warnings being treated as errors
make[4]: *** [/var/home/acme/git/perf-tools-next/tools/build/Makefile.build:97: /tmp/build/perf-tools-next/util/pmus.o] Error 1
make[4]: *** Waiting for unfinished jobs....
  LD      /tmp/build/perf-tools-next/ui/browsers/perf-in.o


So I applied up to 4/7

Please continue from what will be in tmp.perf-tools-next in some
jiffies.

- Arnaldo