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SubjectRe: [jolsa-perf:bpf/fprobe_link 3/10] include/linux/fprobe.h:20:33: error: field 'ops' has incomplete type
Hi Jiri,

This may happen if CONFIG_FUNCTION_TRACER=n. Let me fix it.

Thank you,


On Thu, 3 Feb 2022 11:20:41 +0800
kernel test robot <lkp@intel.com> wrote:

> tree: https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git bpf/fprobe_link
> head: f35f5b111d32e11c2201dcbfa5e3c8c0560a0a43
> commit: 5292dedae3df76ecaa8b83f3a440172a78fff570 [3/10] bpf: Add support to attach kprobe program with fprobe
> config: arc-randconfig-r043-20220130 (https://download.01.org/0day-ci/archive/20220203/202202031105.OEGj0FZz-lkp@intel.com/config)
> compiler: arc-elf-gcc (GCC) 11.2.0
> 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=5292dedae3df76ecaa8b83f3a440172a78fff570
> git remote add jolsa-perf https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git
> git fetch --no-tags jolsa-perf bpf/fprobe_link
> git checkout 5292dedae3df76ecaa8b83f3a440172a78fff570
> # save the config file to linux build tree
> mkdir build_dir
> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arc 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 errors (new ones prefixed by >>):
>
> In file included from kernel/bpf/syscall.c:35:
> >> include/linux/fprobe.h:20:33: error: field 'ops' has incomplete type
> 20 | struct ftrace_ops ops;
> | ^~~
>
>
> vim +/ops +20 include/linux/fprobe.h
>
> 8249a1c232ade1 Masami Hiramatsu 2022-01-26 9
> 8249a1c232ade1 Masami Hiramatsu 2022-01-26 10 /**
> 8249a1c232ade1 Masami Hiramatsu 2022-01-26 11 * struct fprobe - ftrace based probe.
> 8249a1c232ade1 Masami Hiramatsu 2022-01-26 12 * @ops: The ftrace_ops.
> 8249a1c232ade1 Masami Hiramatsu 2022-01-26 13 * @nmissed: The counter for missing events.
> 8249a1c232ade1 Masami Hiramatsu 2022-01-26 14 * @flags: The status flag.
> 806149decce8b0 Masami Hiramatsu 2022-01-26 15 * @rethook: The rethook data structure. (internal data)
> 8249a1c232ade1 Masami Hiramatsu 2022-01-26 16 * @entry_handler: The callback function for function entry.
> 806149decce8b0 Masami Hiramatsu 2022-01-26 17 * @exit_handler: The callback function for function exit.
> 8249a1c232ade1 Masami Hiramatsu 2022-01-26 18 */
> 8249a1c232ade1 Masami Hiramatsu 2022-01-26 19 struct fprobe {
> 8249a1c232ade1 Masami Hiramatsu 2022-01-26 @20 struct ftrace_ops ops;
> 8249a1c232ade1 Masami Hiramatsu 2022-01-26 21 unsigned long nmissed;
> 8249a1c232ade1 Masami Hiramatsu 2022-01-26 22 unsigned int flags;
> 806149decce8b0 Masami Hiramatsu 2022-01-26 23 struct rethook *rethook;
> 806149decce8b0 Masami Hiramatsu 2022-01-26 24
> 8249a1c232ade1 Masami Hiramatsu 2022-01-26 25 void (*entry_handler)(struct fprobe *fp, unsigned long entry_ip, struct pt_regs *regs);
> 806149decce8b0 Masami Hiramatsu 2022-01-26 26 void (*exit_handler)(struct fprobe *fp, unsigned long entry_ip, struct pt_regs *regs);
> 8249a1c232ade1 Masami Hiramatsu 2022-01-26 27 };
> 8249a1c232ade1 Masami Hiramatsu 2022-01-26 28
>
> :::::: The code at line 20 was first introduced by commit
> :::::: 8249a1c232ade17392af10f640a79a5200744474 fprobe: Add ftrace based probe APIs
>
> :::::: TO: Masami Hiramatsu <mhiramat@kernel.org>
> :::::: CC: Masami Hiramatsu <mhiramat@kernel.org>
>
> ---
> 0-DAY CI Kernel Test Service, Intel Corporation
> https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org


--
Masami Hiramatsu <mhiramat@kernel.org>

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