linux-kernel - Re: [ammarfaizi2-block:google/android/kernel/common/android13-5.10 9989/9999] main.c:118:5: warning: no previous prototype for 'eprintf'

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Date:   Tue, 18 Jan 2022 20:36:25 -0800
From:   Andrii Nakryiko <andrii.nakryiko@...il.com>
To:     kernel test robot <lkp@...el.com>
Cc:     "Connor O'Brien" <connoro@...gle.com>, kbuild-all@...ts.01.org,
        "GNU/Weeb Mailing List" <gwml@...weeb.org>,
        open list <linux-kernel@...r.kernel.org>,
        Andrii Nakryiko <andrii@...nel.org>
Subject: Re: [ammarfaizi2-block:google/android/kernel/common/android13-5.10
 9989/9999] main.c:118:5: warning: no previous prototype for 'eprintf'

On Tue, Jan 18, 2022 at 8:33 PM kernel test robot <lkp@...el.com> wrote:
>
> tree:   https://github.com/ammarfaizi2/linux-block google/android/kernel/common/android13-5.10
> head:   976a28295a01db618903406bd67cae53a4c29832
> commit: 44b9bfcd4cdbc57889a0fecf79a6d30237f21bed [9989/9999] FROMGIT: tools/resolve_btfids: Build with host flags
> config: x86_64-rhel-8.3-kselftests (https://download.01.org/0day-ci/archive/20220119/202201191239.XKS6Ud9B-lkp@intel.com/config)
> compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
> reproduce (this is a W=1 build):
>         # https://github.com/ammarfaizi2/linux-block/commit/44b9bfcd4cdbc57889a0fecf79a6d30237f21bed
>         git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
>         git fetch --no-tags ammarfaizi2-block google/android/kernel/common/android13-5.10
>         git checkout 44b9bfcd4cdbc57889a0fecf79a6d30237f21bed
>         # save the config file to linux build tree
>         mkdir build_dir
>         make W=1 O=build_dir ARCH=x86_64 prepare
>
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@...el.com>
>
> All warnings (new ones prefixed by >>):
>
> >> main.c:118:5: warning: no previous prototype for 'eprintf' [-Wmissing-prototypes]
>      118 | int eprintf(int level, int var, const char *fmt, ...)
>          |     ^~~~~~~
>    main.c: In function 'symbols_collect':
>    main.c:407:7: warning: unused variable 'err' [-Wunused-variable]
>      407 |   int err = -1;
>          |       ^~~
>    main.c:404:9: warning: unused variable 'tmp' [-Wunused-variable]
>      404 |   char *tmp, *prefix;
>          |         ^~~
>    main.c: In function 'eprintf':
> >> main.c:128:9: warning: 'ret' may be used uninitialized in this function [-Wmaybe-uninitialized]
>      128 |  return ret;
>          |         ^~~
>

All this has been addressed 9 months (!) ago by:

e27bfefb21f2 ("tools/resolve_btfids: Fix warnings")


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