linux-kernel - [jolsa-perf:kprobe/multi 6/13] kernel/trace/bpf_trace.c:1032:22: error: implicit declaration of function 'kprobe_ftrace_multi

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Message-ID: <202112280625.ZNZllxQ6-lkp@intel.com>
Date:   Tue, 28 Dec 2021 06:54:30 +0800
From:   kernel test robot <lkp@...el.com>
To:     Jiri Olsa <jolsa@...nel.org>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org
Subject: [jolsa-perf:kprobe/multi 6/13] kernel/trace/bpf_trace.c:1032:22:
 error: implicit declaration of function 'kprobe_ftrace_multi_addr'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git kprobe/multi
head:   bc59262730d5cfc95d6cae84f247d2e8690a309b
commit: a1974e6769e507428f52729967e6670a1548c239 [6/13] kprobe: Allow to get traced function address for multi ftrace kprobes
config: x86_64-randconfig-a003-20211227 (https://download.01.org/0day-ci/archive/20211228/202112280625.ZNZllxQ6-lkp@intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 511726c64d3b6cca66f7c54d457d586aa3129f67)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git/commit/?id=a1974e6769e507428f52729967e6670a1548c239
        git remote add jolsa-perf https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git
        git fetch --no-tags jolsa-perf kprobe/multi
        git checkout a1974e6769e507428f52729967e6670a1548c239
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash

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 kernel/trace/bpf_trace.c:14:
   include/linux/kprobes.h:76:21: error: field has incomplete type 'struct ftrace_ops'
                   struct ftrace_ops ops;
                                     ^
   include/linux/ftrace.h:332:8: note: forward declaration of 'struct ftrace_ops'
   struct ftrace_ops;
          ^
>> kernel/trace/bpf_trace.c:1032:22: error: implicit declaration of function 'kprobe_ftrace_multi_addr' [-Werror,-Wimplicit-function-declaration]
                   return (uintptr_t) kprobe_ftrace_multi_addr();
                                      ^
   kernel/trace/bpf_trace.c:1032:22: note: did you mean 'kprobe_ftrace_multi'?
   include/linux/kprobes.h:144:20: note: 'kprobe_ftrace_multi' declared here
   static inline bool kprobe_ftrace_multi(struct kprobe *p)
                      ^
   2 errors generated.


vim +/kprobe_ftrace_multi_addr +1032 kernel/trace/bpf_trace.c

  1024	
  1025	BPF_CALL_1(bpf_get_func_ip_kprobe, struct pt_regs *, regs)
  1026	{
  1027		struct kprobe *kp = kprobe_running();
  1028	
  1029		if (!kp)
  1030			return 0;
  1031		if (kprobe_ftrace_multi(kp))
> 1032			return (uintptr_t) kprobe_ftrace_multi_addr();
  1033		else
  1034			return (uintptr_t) kp->func_addr;
  1035	}
  1036	

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