linux-kernel - pmu-events/jevents.c:72:22: warning: no previous prototype for 'convert'

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Message-ID: <202306012020.E4oEWbWO-lkp@intel.com>
Date:   Thu, 1 Jun 2023 22:33:53 +0800
From:   kernel test robot <lkp@...el.com>
To:     Kajol Jain <kjain@...ux.ibm.com>
Cc:     oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: pmu-events/jevents.c:72:22: warning: no previous prototype for
 'convert'

Hi Kajol,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   929ed21dfdb6ee94391db51c9eedb63314ef6847
commit: 560ccbc4a52c567096023e0c6a9b920048e59017 perf jevents: Add support for parsing perchip/percore events
date:   2 years, 9 months ago
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce:
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=560ccbc4a52c567096023e0c6a9b920048e59017
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 560ccbc4a52c567096023e0c6a9b920048e59017
        make O=/tmp/kselftest headers
        make O=/tmp/kselftest -C tools/testing/selftests

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202306012020.E4oEWbWO-lkp@intel.com/

Note: functions only called from assembly code should be annotated with the asmlinkage attribute
All warnings (new ones prefixed by >>):

   Warning: Kernel ABI header at 'tools/include/uapi/linux/in.h' differs from latest version at 'include/uapi/linux/in.h'
   Warning: Kernel ABI header at 'tools/include/uapi/linux/perf_event.h' differs from latest version at 'include/uapi/linux/perf_event.h'
   Makefile.config:697: No libcrypto.h found, disables jitted code injection, please install openssl-devel or libssl-dev
>> pmu-events/jevents.c:72:22: warning: no previous prototype for 'convert' [-Wmissing-prototypes]
      72 | enum aggr_mode_class convert(const char *aggr_mode)
         |                      ^~~~~~~
   In file included from sigchain.c:3:
   In function 'xrealloc',
       inlined from 'sigchain_push.isra' at sigchain.c:26:2:
   subcmd-util.h:56:23: error: pointer may be used after 'realloc' [-Werror=use-after-free]
      56 |                 ret = realloc(ptr, size);
         |                       ^~~~~~~~~~~~~~~~~~
   subcmd-util.h:52:21: note: call to 'realloc' here
      52 |         void *ret = realloc(ptr, size);
         |                     ^~~~~~~~~~~~~~~~~~
   subcmd-util.h:58:31: error: pointer may be used after 'realloc' [-Werror=use-after-free]
      58 |                         ret = realloc(ptr, 1);
         |                               ^~~~~~~~~~~~~~~
   subcmd-util.h:52:21: note: call to 'realloc' here
      52 |         void *ret = realloc(ptr, size);
         |                     ^~~~~~~~~~~~~~~~~~
   In function 'xrealloc',
       inlined from 'sigchain_push' at sigchain.c:26:2,
       inlined from 'sigchain_push_common' at sigchain.c:53:2:
   subcmd-util.h:56:23: error: pointer may be used after 'realloc' [-Werror=use-after-free]
      56 |                 ret = realloc(ptr, size);
         |                       ^~~~~~~~~~~~~~~~~~
   subcmd-util.h:52:21: note: call to 'realloc' here
      52 |         void *ret = realloc(ptr, size);
         |                     ^~~~~~~~~~~~~~~~~~
   subcmd-util.h:58:31: error: pointer may be used after 'realloc' [-Werror=use-after-free]
      58 |                         ret = realloc(ptr, 1);
         |                               ^~~~~~~~~~~~~~~
   subcmd-util.h:52:21: note: call to 'realloc' here
      52 |         void *ret = realloc(ptr, size);
         |                     ^~~~~~~~~~~~~~~~~~
   cc1: all warnings being treated as errors
   make[6]: *** [tools/build/Makefile.build:96: tools/perf/sigchain.o] Error 1
   make[6]: *** Waiting for unfinished jobs....
   In file included from help.c:12:
   In function 'xrealloc',
       inlined from 'add_cmdname' at help.c:24:2:
   subcmd-util.h:56:23: error: pointer may be used after 'realloc' [-Werror=use-after-free]
      56 |                 ret = realloc(ptr, size);
         |                       ^~~~~~~~~~~~~~~~~~
   subcmd-util.h:52:21: note: call to 'realloc' here
      52 |         void *ret = realloc(ptr, size);
         |                     ^~~~~~~~~~~~~~~~~~
   subcmd-util.h:58:31: error: pointer may be used after 'realloc' [-Werror=use-after-free]
      58 |                         ret = realloc(ptr, 1);
         |                               ^~~~~~~~~~~~~~~
   subcmd-util.h:52:21: note: call to 'realloc' here
      52 |         void *ret = realloc(ptr, size);
         |                     ^~~~~~~~~~~~~~~~~~
   cc1: all warnings being treated as errors
   make[6]: *** [tools/build/Makefile.build:96: tools/perf/help.o] Error 1
   make[5]: *** [Makefile:59: tools/perf/libsubcmd-in.o] Error 2
   make[4]: *** [Makefile.perf:811: tools/perf/libsubcmd.a] Error 2
   make[4]: *** Waiting for unfinished jobs....
     PERF_VERSION = 5.9.rc3.g560ccbc4a52c
   make[3]: *** [Makefile.perf:233: sub-make] Error 2
   make[2]: *** [Makefile:70: all] Error 2

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