Re: [PATCH 5/7] perf pmu: Move pmu__find_core_pmu() to pmus.c

From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: James Clark <james.clark@arm.com>
Cc: linux-perf-users@vger.kernel.org, irogers@google.com,
	John Garry <john.g.garry@oracle.com>,
	Will Deacon <will@kernel.org>, Mike Leach <mike.leach@linaro.org>,
	Leo Yan <leo.yan@linaro.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Ingo Molnar <mingo@redhat.com>,
	Mark Rutland <mark.rutland@arm.com>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Jiri Olsa <jolsa@kernel.org>, Namhyung Kim <namhyung@kernel.org>,
	Adrian Hunter <adrian.hunter@intel.com>,
	Kan Liang <kan.liang@linux.intel.com>,
	Jing Zhang <renyu.zj@linux.alibaba.com>,
	Haixin Yu <yuhaixin.yhx@linux.alibaba.com>,
	Kajol Jain <kjain@linux.ibm.com>,
	Ravi Bangoria <ravi.bangoria@amd.com>,
	Yang Jihong <yangjihong1@huawei.com>,
	Eduard Zingerman <eddyz87@gmail.com>,
	Chen Zhongjin <chenzhongjin@huawei.com>,
	Miguel Ojeda <ojeda@kernel.org>,
	Liam Howlett <liam.howlett@oracle.com>,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 5/7] perf pmu: Move pmu__find_core_pmu() to pmus.c
Date: Tue, 12 Sep 2023 16:26:45 -0300	[thread overview]
Message-ID: <ZQC7da2AM9ih8RMz@kernel.org> (raw)
In-Reply-To: <20230831151632.124985-6-james.clark@arm.com>

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@arm.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