[josef-btrfs:bpf-override-return 1/4] kernel/kprobes.c:2345:2: error: implicit declaration of function 'populate_kernel_kprobe_ei_list'; did you mean 'module_unload_kprobe_ei_list'?

[kbuild test robot <fengguang.wu@xxxxxxxxx>]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/josef/btrfs-next.git bpf-override-return
head:   9d789a052c0b5d31c2c3c0614b1450051508836c
commit: effbb385b04345a1bf39542cebf435bc770c1776 [1/4] add infrastructure for tagging functions as error injectable
config: sparc64-allyesconfig (attached as .config)
compiler: sparc64-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout effbb385b04345a1bf39542cebf435bc770c1776
        # save the attached .config to linux build tree
        make.cross ARCH=sparc64 

All errors (new ones prefixed by >>):

   kernel/kprobes.c: In function 'init_kprobes':
>> kernel/kprobes.c:2345:2: error: implicit declaration of function 'populate_kernel_kprobe_ei_list'; did you mean 'module_unload_kprobe_ei_list'? [-Werror=implicit-function-declaration]
     populate_kernel_kprobe_ei_list();
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     module_unload_kprobe_ei_list
   cc1: some warnings being treated as errors

vim +2345 kernel/kprobes.c

  2325	
  2326	static int __init init_kprobes(void)
  2327	{
  2328		int i, err = 0;
  2329	
  2330		/* FIXME allocate the probe table, currently defined statically */
  2331		/* initialize all list heads */
  2332		for (i = 0; i < KPROBE_TABLE_SIZE; i++) {
  2333			INIT_HLIST_HEAD(&kprobe_table[i]);
  2334			INIT_HLIST_HEAD(&kretprobe_inst_table[i]);
  2335			raw_spin_lock_init(&(kretprobe_table_locks[i].lock));
  2336		}
  2337	
  2338		err = populate_kprobe_blacklist(__start_kprobe_blacklist,
  2339						__stop_kprobe_blacklist);
  2340		if (err) {
  2341			pr_err("kprobes: failed to populate blacklist: %d\n", err);
  2342			pr_err("Please take care of using kprobes.\n");
  2343		}
  2344	
> 2345		populate_kernel_kprobe_ei_list();
  2346	
  2347		if (kretprobe_blacklist_size) {
  2348			/* lookup the function address from its name */
  2349			for (i = 0; kretprobe_blacklist[i].name != NULL; i++) {
  2350				kretprobe_blacklist[i].addr =
  2351					kprobe_lookup_name(kretprobe_blacklist[i].name, 0);
  2352				if (!kretprobe_blacklist[i].addr)
  2353					printk("kretprobe: lookup failed: %s\n",
  2354					       kretprobe_blacklist[i].name);
  2355			}
  2356		}
  2357	

---
0-DAY kernel test infrastructure                Open Source Technology Center
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