linux-kernel - [jolsa-perf:kprobe/multi 4/13] kernel/kprobes.c:1757:9: error: no member named 'multi' in 'struct kprobe'

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Message-ID: <202112291313.NBZhynh0-lkp@intel.com>
Date:   Wed, 29 Dec 2021 13:46:28 +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 4/13] kernel/kprobes.c:1757:9: error: no
 member named 'multi' in 'struct kprobe'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git kprobe/multi
head:   774280c9bc95e4e50cda3cd09324bd03fec50b52
commit: b20ae58e76fd39a4b63168d1b8b97db3a45c5680 [4/13] kprobe: Add support to register multiple ftrace kprobes
config: riscv-buildonly-randconfig-r006-20211228 (https://download.01.org/0day-ci/archive/20211229/202112291313.NBZhynh0-lkp@intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 7171af744543433ac75b232eb7dfdaef7efd4d7a)
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
        # install riscv cross compiling tool for clang build
        # apt-get install binutils-riscv64-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git/commit/?id=b20ae58e76fd39a4b63168d1b8b97db3a45c5680
        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 b20ae58e76fd39a4b63168d1b8b97db3a45c5680
        # 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=riscv 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 >>):

>> kernel/kprobes.c:1757:9: error: no member named 'multi' in 'struct kprobe'
           if (p->multi.cnt)
               ~  ^
   kernel/kprobes.c:1989:12: warning: no previous prototype for function 'kprobe_exceptions_notify' [-Wmissing-prototypes]
   int __weak kprobe_exceptions_notify(struct notifier_block *self,
              ^
   kernel/kprobes.c:1989:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int __weak kprobe_exceptions_notify(struct notifier_block *self,
   ^
   static 
   1 warning and 1 error generated.


vim +1757 kernel/kprobes.c

  1745	
  1746	int register_kprobe(struct kprobe *p)
  1747	{
  1748		struct module *probed_mod = NULL;
  1749		struct kprobe *old_p;
  1750		int ret;
  1751	
  1752		/* User can pass only KPROBE_FLAG_DISABLED to register_kprobe */
  1753		p->flags &= KPROBE_FLAG_DISABLED;
  1754		p->nmissed = 0;
  1755		INIT_LIST_HEAD(&p->list);
  1756	
> 1757		if (p->multi.cnt)
  1758			ret = check_ftrace_multi(p);
  1759		else
  1760			ret = check_addr(p, &probed_mod);
  1761		if (ret)
  1762			return ret;
  1763	
  1764		mutex_lock(&kprobe_mutex);
  1765	
  1766		old_p = get_kprobe(p->addr);
  1767		if (old_p) {
  1768			/* Since this may unoptimize 'old_p', locking 'text_mutex'. */
  1769			ret = register_aggr_kprobe(old_p, p);
  1770			goto out;
  1771		}
  1772	
  1773		cpus_read_lock();
  1774		/* Prevent text modification */
  1775		mutex_lock(&text_mutex);
  1776		ret = prepare_kprobe(p);
  1777		mutex_unlock(&text_mutex);
  1778		cpus_read_unlock();
  1779		if (ret)
  1780			goto out;
  1781	
  1782		/*
  1783		 * Multi ftrace kprobes do not have single address,
  1784		 * so they are not stored in the kprobe_table hash.
  1785		 */
  1786		if (kprobe_single(p)) {
  1787			INIT_HLIST_NODE(&p->hlist);
  1788			hlist_add_head_rcu(&p->hlist,
  1789				       &kprobe_table[hash_ptr(p->addr, KPROBE_HASH_BITS)]);
  1790		}
  1791	
  1792		if (!kprobes_all_disarmed && !kprobe_disabled(p)) {
  1793			ret = arm_kprobe(p);
  1794			if (ret) {
  1795				if (kprobe_single(p))
  1796					hlist_del_rcu(&p->hlist);
  1797				synchronize_rcu();
  1798				goto out;
  1799			}
  1800		}
  1801	
  1802		/* Try to optimize kprobe */
  1803		try_to_optimize_kprobe(p);
  1804	out:
  1805		mutex_unlock(&kprobe_mutex);
  1806	
  1807		if (probed_mod)
  1808			module_put(probed_mod);
  1809	
  1810		return ret;
  1811	}
  1812	EXPORT_SYMBOL_GPL(register_kprobe);
  1813	

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