linux-kernel - Re: [PATCH 1/3] tools libc

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Date:   Mon, 26 Jul 2021 06:04:00 +0800
From:   kernel test robot <lkp@...el.com>
To:     Riccardo Mancini <rickyman7@...il.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     kbuild-all@...ts.01.org, Namhyung Kim <namhyung@...nel.org>,
        Ian Rogers <irogers@...gle.com>,
        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@...hat.com>,
        Riccardo Mancini <rickyman7@...il.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] tools libc_compat: add gettid

Hi Riccardo,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on tip/perf/core]
[also build test ERROR on linux/master linus/master v5.14-rc2 next-20210723]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Riccardo-Mancini/tools-add-gettid-to-libc_compat-h/20210722-233601
base:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git c76826a65f50038f050424365dbf3f97203f8710
config: x86_64-rhel-8.3-kselftests (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://github.com/0day-ci/linux/commit/42df183984cce4c25932242bbf9133684e9425db
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Riccardo-Mancini/tools-add-gettid-to-libc_compat-h/20210722-233601
        git checkout 42df183984cce4c25932242bbf9133684e9425db
        # save the attached .config to linux build tree
        mkdir build_dir
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash -C tools/testing/selftests/bpf install

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All errors (new ones prefixed by >>):

   In file included from main.h:15,
                    from xlated_dumper.c:14:
   tools/include/tools/libc_compat.h: In function 'gettid':
   tools/include/tools/libc_compat.h:24:16: warning: implicit declaration of function 'syscall' [-Wimplicit-function-declaration]
      24 |  return (pid_t)syscall(__NR_gettid);
         |                ^~~~~~~
>> tools/include/tools/libc_compat.h:24:24: error: '__NR_gettid' undeclared (first use in this function)
      24 |  return (pid_t)syscall(__NR_gettid);
         |                        ^~~~~~~~~~~
   tools/include/tools/libc_compat.h:24:24: note: each undeclared identifier is reported only once for each function it appears in
--
   In file included from main.h:15,
                    from common.c:27:
>> tools/include/tools/libc_compat.h:22:21: error: static declaration of 'gettid' follows non-static declaration
      22 | static inline pid_t gettid(void)
         |                     ^~~~~~
   In file included from /usr/include/unistd.h:1170,
                    from common.c:15:
   /usr/include/x86_64-linux-gnu/bits/unistd_ext.h:34:16: note: previous declaration of 'gettid' was here
      34 | extern __pid_t gettid (void) __THROW;
         |                ^~~~~~
   In file included from main.h:15,
                    from common.c:27:
   tools/include/tools/libc_compat.h: In function 'gettid':
>> tools/include/tools/libc_compat.h:24:24: error: '__NR_gettid' undeclared (first use in this function)
      24 |  return (pid_t)syscall(__NR_gettid);
         |                        ^~~~~~~~~~~
   tools/include/tools/libc_compat.h:24:24: note: each undeclared identifier is reported only once for each function it appears in
--
   In file included from main.h:15,
                    from btf.c:20:
   tools/include/tools/libc_compat.h: In function 'gettid':
>> tools/include/tools/libc_compat.h:24:24: error: '__NR_gettid' undeclared (first use in this function)
      24 |  return (pid_t)syscall(__NR_gettid);
         |                        ^~~~~~~~~~~
   tools/include/tools/libc_compat.h:24:24: note: each undeclared identifier is reported only once for each function it appears in


vim +/__NR_gettid +24 tools/include/tools/libc_compat.h

    20	
    21	#ifndef HAVE_GETTID
  > 22	static inline pid_t gettid(void)
    23	{
  > 24		return (pid_t)syscall(__NR_gettid);

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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