[ast:bpf_tramp 4/6] kernel/bpf/verifier.c:9485:40: error: 'MCOUNT_INSN_SIZE' undeclared; did you mean 'UCOUNT_COUNTS'?

[ast:bpf_tramp 4/6] kernel/bpf/verifier.c:9485:40: error: 'MCOUNT_INSN_SIZE' undeclared; did you mean 'UCOUNT_COUNTS'?

[kbuild test robot]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/ast/bpf.git bpf_tramp
head:   79342704f7a85cae631373124998449f047fa0f1
commit: 1d5c082bc909135b1e206a34e0cfcd57d29dbd62 [4/6] bpf: introduce BPF trampoline
config: m68k-allyesconfig (attached as .config)
compiler: m68k-linux-gcc (GCC) 7.4.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 1d5c082bc909135b1e206a34e0cfcd57d29dbd62
        # save the attached .config to linux build tree
        GCC_VERSION=7.4.0 make.cross ARCH=m68k 

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

All errors (new ones prefixed by >>):

   kernel/bpf/verifier.c: In function 'prepare_bpf_trampoline':
>> kernel/bpf/verifier.c:9485:40: error: 'MCOUNT_INSN_SIZE' undeclared (first use in this function); did you mean 'UCOUNT_COUNTS'?
             prog->aux->attach_func_addr + MCOUNT_INSN_SIZE);
                                           ^~~~~~~~~~~~~~~~
                                           UCOUNT_COUNTS
   kernel/bpf/verifier.c:9485:40: note: each undeclared identifier is reported only once for each function it appears in

vim +9485 kernel/bpf/verifier.c

  9467	
  9468	static int prepare_bpf_trampoline(struct bpf_verifier_env *env)
  9469	{
  9470		struct bpf_prog *prog = env->prog;
  9471		/* flags to attach at fentry */
  9472		u32 flags = BPF_TRAMP_F_RESTORE_REGS;
  9473		void *tramp;
  9474	
  9475		if (!prog->aux->needs_trampoline)
  9476			return 0;
  9477	
  9478		if (prog->expected_attach_type == BPF_TRACE_FEXIT)
  9479			/* flags to attach at fentry with kretprobe-like behavior */
  9480			flags = BPF_TRAMP_F_CALL_ORIG | BPF_TRAMP_F_SKIP_FRAME;
  9481		tramp = arch_prepare_bpf_trampoline(&prog->aux->attach_func_model,
  9482						    flags,
  9483						    __bpf_prog_run_from_trampoline,
  9484						    (long)prog,
> 9485						    prog->aux->attach_func_addr + MCOUNT_INSN_SIZE);
  9486		if (IS_ERR(tramp))
  9487			return PTR_ERR(tramp);
  9488		prog->aux->trampoline = tramp;
  9489		return 0;
  9490	}
  9491	

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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