Re: [RFC PATCH 6/6] bpf: Add kprobe link for attaching raw kprobes

[kernel test robot <lkp@intel.com>]

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Hi Masami,

[FYI, it's a private test report for your RFC patch.]
[auto build test WARNING on rostedt-trace/for-next]
[also build test WARNING on bpf-next/master bpf/master linus/master v5.16]
[cannot apply to next-20220112]
[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/Masami-Hiramatsu/fprobe-Add-ftrace-based-probe-APIs/20220112-000050
base:   https://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git for-next
config: x86_64-randconfig-a011 (https://download.01.org/0day-ci/archive/20220113/202201130621.vPqexP9P-lkp(a)intel.com/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/ba002e6556acd9e0af16442f4226ddb2a8759567
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Masami-Hiramatsu/fprobe-Add-ftrace-based-probe-APIs/20220112-000050
        git checkout ba002e6556acd9e0af16442f4226ddb2a8759567
        # save the config file to linux build tree
        mkdir build_dir
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash kernel/bpf/

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

All warnings (new ones prefixed by >>):

   In file included from kernel/bpf/syscall.c:34:
>> include/linux/fprobes.h:57:22: warning: no previous prototype for 'fprobe_find_entry' [-Wmissing-prototypes]
      57 | struct fprobe_entry *fprobe_find_entry(struct fprobe *fp, unsigned long addr)
         |                      ^~~~~~~~~~~~~~~~~


vim +/fprobe_find_entry +57 include/linux/fprobes.h

7b8ed3653f3755 Masami Hiramatsu 2022-01-12  43  
7b8ed3653f3755 Masami Hiramatsu 2022-01-12  44  #ifdef CONFIG_FPROBES
7b8ed3653f3755 Masami Hiramatsu 2022-01-12  45  int register_fprobe(struct fprobe *fp);
7b8ed3653f3755 Masami Hiramatsu 2022-01-12  46  int unregister_fprobe(struct fprobe *fp);
7b8ed3653f3755 Masami Hiramatsu 2022-01-12  47  struct fprobe_entry *fprobe_find_entry(struct fprobe *fp, unsigned long addr);
7b8ed3653f3755 Masami Hiramatsu 2022-01-12  48  #else
7b8ed3653f3755 Masami Hiramatsu 2022-01-12  49  static inline int register_fprobe(struct fprobe *fp)
7b8ed3653f3755 Masami Hiramatsu 2022-01-12  50  {
7b8ed3653f3755 Masami Hiramatsu 2022-01-12  51  	return -ENOTSUPP;
7b8ed3653f3755 Masami Hiramatsu 2022-01-12  52  }
7b8ed3653f3755 Masami Hiramatsu 2022-01-12  53  static inline int unregister_fprobe(struct fprobe *fp)
7b8ed3653f3755 Masami Hiramatsu 2022-01-12  54  {
7b8ed3653f3755 Masami Hiramatsu 2022-01-12  55  	return -ENOTSUPP;
7b8ed3653f3755 Masami Hiramatsu 2022-01-12  56  }
7b8ed3653f3755 Masami Hiramatsu 2022-01-12 @57  struct fprobe_entry *fprobe_find_entry(struct fprobe *fp, unsigned long addr)
7b8ed3653f3755 Masami Hiramatsu 2022-01-12  58  {
7b8ed3653f3755 Masami Hiramatsu 2022-01-12  59  	return NULL;
7b8ed3653f3755 Masami Hiramatsu 2022-01-12  60  }
7b8ed3653f3755 Masami Hiramatsu 2022-01-12  61  #endif
7b8ed3653f3755 Masami Hiramatsu 2022-01-12  62  

---
0-DAY CI Kernel Test Service, Intel Corporation
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