linux-kernel - [jolsa-perf:bpf/tramp_22 21/21] kernel/bpf/syscall.c:3137:22: error: implicit declaration of function 'bpf_trampoline_multi

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Message-ID: <202207061138.sopuGQ2w-lkp@intel.com>
Date:   Wed, 6 Jul 2022 11:58:22 +0800
From:   kernel test robot <lkp@...el.com>
To:     Jiri Olsa <jolsa@...nel.org>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: [jolsa-perf:bpf/tramp_22 21/21] kernel/bpf/syscall.c:3137:22: error:
 implicit declaration of function 'bpf_trampoline_multi_detach'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git bpf/tramp_22
head:   1d891c46bb689a24985cea58f4eddb053d6b1331
commit: 1d891c46bb689a24985cea58f4eddb053d6b1331 [21/21] bpf: Add support to attach multi trampolines
config: x86_64-randconfig-a013 (https://download.01.org/0day-ci/archive/20220706/202207061138.sopuGQ2w-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-3) 11.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git/commit/?id=1d891c46bb689a24985cea58f4eddb053d6b1331
        git remote add jolsa-perf https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git
        git fetch --no-tags jolsa-perf bpf/tramp_22
        git checkout 1d891c46bb689a24985cea58f4eddb053d6b1331
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash

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

All errors (new ones prefixed by >>):

   In file included from arch/x86/include/asm/bug.h:87,
                    from include/linux/bug.h:5,
                    from include/linux/cpumask.h:14,
                    from arch/x86/include/asm/cpumask.h:5,
                    from arch/x86/include/asm/msr.h:11,
                    from arch/x86/include/asm/processor.h:22,
                    from arch/x86/include/asm/timex.h:5,
                    from include/linux/timex.h:67,
                    from include/linux/time32.h:13,
                    from include/linux/time.h:60,
                    from include/linux/ktime.h:24,
                    from include/linux/timer.h:6,
                    from include/linux/workqueue.h:9,
                    from include/linux/bpf.h:10,
                    from kernel/bpf/syscall.c:4:
   kernel/bpf/syscall.c: In function 'bpf_tracing_multi_link_release':
>> kernel/bpf/syscall.c:3137:22: error: implicit declaration of function 'bpf_trampoline_multi_detach' [-Werror=implicit-function-declaration]
    3137 |         WARN_ON_ONCE(bpf_trampoline_multi_detach(&tr_link->tp, tr_link->id));
         |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/asm-generic/bug.h:110:32: note: in definition of macro 'WARN_ON_ONCE'
     110 |         int __ret_warn_on = !!(condition);                      \
         |                                ^~~~~~~~~
   kernel/bpf/syscall.c: In function 'bpf_tracing_multi_attach':
   kernel/bpf/syscall.c:3307:14: error: implicit declaration of function 'bpf_tramp_id_alloc'; did you mean 'bpf_tramp_id_resolve'? [-Werror=implicit-function-declaration]
    3307 |         id = bpf_tramp_id_alloc(cnt);
         |              ^~~~~~~~~~~~~~~~~~
         |              bpf_tramp_id_resolve
   kernel/bpf/syscall.c:3307:12: warning: assignment to 'struct bpf_tramp_id *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
    3307 |         id = bpf_tramp_id_alloc(cnt);
         |            ^
>> kernel/bpf/syscall.c:3348:15: error: implicit declaration of function 'bpf_trampoline_multi_attach'; did you mean 'bpf_tracing_multi_attach'? [-Werror=implicit-function-declaration]
    3348 |         err = bpf_trampoline_multi_attach(&link->tp, id);
         |               ^~~~~~~~~~~~~~~~~~~~~~~~~~~
         |               bpf_tracing_multi_attach
   cc1: some warnings being treated as errors


vim +/bpf_trampoline_multi_detach +3137 kernel/bpf/syscall.c

  3131	
  3132	static void bpf_tracing_multi_link_release(struct bpf_link *link)
  3133	{
  3134		struct bpf_tracing_multi_link *tr_link =
  3135			container_of(link, struct bpf_tracing_multi_link, link);
  3136	
> 3137		WARN_ON_ONCE(bpf_trampoline_multi_detach(&tr_link->tp, tr_link->id));
  3138	}
  3139	

-- 
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