linux-kernel - include/linux/kprobes.h:332:2: error: invalid use of undefined type 'struct kprobe

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Message-ID: <201609040706.ZvMHzm1Z%fengguang.wu@intel.com>
Date:   Sun, 4 Sep 2016 07:35:21 +0800
From:   kbuild test robot <fengguang.wu@...el.com>
To:     Christoph Lameter <cl@...ux-foundation.org>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org,
        Tejun Heo <tj@...nel.org>
Subject: include/linux/kprobes.h:332:2: error: invalid use of undefined type
 'struct kprobe_ctlblk'

Hi Christoph,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   4b30b6d126ca8b23b319f5329570f6855736a095
commit: abec1a806e0c3cf168999667d5fb6218398ef12a percpu: Make __verify_pcu_ptr handle per cpu pointers to arrays
date:   3 years ago
config: mn10300-allmodconfig (attached as .config)
compiler: am33_2.0-linux-gcc (GCC) 4.9.0
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout abec1a806e0c3cf168999667d5fb6218398ef12a
        # save the attached .config to linux build tree
        make.cross ARCH=mn10300 

All errors (new ones prefixed by >>):

   In file included from arch/mn10300/kernel/kprobes.c:20:0:
   include/linux/kprobes.h: In function 'get_kprobe_ctlblk':
>> include/linux/kprobes.h:332:2: error: invalid use of undefined type 'struct kprobe_ctlblk'
     return (&__get_cpu_var(kprobe_ctlblk));
     ^
   In file included from arch/mn10300/include/asm/percpu.h:1:0,
                    from include/linux/percpu.h:10,
                    from include/linux/kprobes.h:38,
                    from arch/mn10300/kernel/kprobes.c:20:
   include/asm-generic/percpu.h:83:29: error: dereferencing pointer to incomplete type
    #define __get_cpu_var(var) (*VERIFY_PERCPU_PTR(&(var)))
                                ^
   include/linux/kprobes.h:332:11: note: in expansion of macro '__get_cpu_var'
     return (&__get_cpu_var(kprobe_ctlblk));
              ^

vim +332 include/linux/kprobes.h

ef53d9c5 Srinivasa D S              2008-07-25  316  void kretprobe_hash_unlock(struct task_struct *tsk, unsigned long *flags);
b94cce92 Hien Nguyen                2005-06-23  317  struct hlist_head * kretprobe_inst_table_head(struct task_struct *tsk);
^1da177e Linus Torvalds             2005-04-16  318  
e6584523 Ananth N Mavinakayanahalli 2005-11-07  319  /* kprobe_running() will just return the current_kprobe on this CPU */
e6584523 Ananth N Mavinakayanahalli 2005-11-07  320  static inline struct kprobe *kprobe_running(void)
e6584523 Ananth N Mavinakayanahalli 2005-11-07  321  {
b76834bc Christoph Lameter          2010-12-06  322  	return (__this_cpu_read(current_kprobe));
e6584523 Ananth N Mavinakayanahalli 2005-11-07  323  }
e6584523 Ananth N Mavinakayanahalli 2005-11-07  324  
e6584523 Ananth N Mavinakayanahalli 2005-11-07  325  static inline void reset_current_kprobe(void)
e6584523 Ananth N Mavinakayanahalli 2005-11-07  326  {
b76834bc Christoph Lameter          2010-12-06  327  	__this_cpu_write(current_kprobe, NULL);
e6584523 Ananth N Mavinakayanahalli 2005-11-07  328  }
e6584523 Ananth N Mavinakayanahalli 2005-11-07  329  
e6584523 Ananth N Mavinakayanahalli 2005-11-07  330  static inline struct kprobe_ctlblk *get_kprobe_ctlblk(void)
e6584523 Ananth N Mavinakayanahalli 2005-11-07  331  {
e6584523 Ananth N Mavinakayanahalli 2005-11-07 @332  	return (&__get_cpu_var(kprobe_ctlblk));
e6584523 Ananth N Mavinakayanahalli 2005-11-07  333  }
e6584523 Ananth N Mavinakayanahalli 2005-11-07  334  
^1da177e Linus Torvalds             2005-04-16  335  int register_kprobe(struct kprobe *p);
^1da177e Linus Torvalds             2005-04-16  336  void unregister_kprobe(struct kprobe *p);
9861668f Masami Hiramatsu           2008-04-28  337  int register_kprobes(struct kprobe **kps, int num);
9861668f Masami Hiramatsu           2008-04-28  338  void unregister_kprobes(struct kprobe **kps, int num);
^1da177e Linus Torvalds             2005-04-16  339  int setjmp_pre_handler(struct kprobe *, struct pt_regs *);
^1da177e Linus Torvalds             2005-04-16  340  int longjmp_break_handler(struct kprobe *, struct pt_regs *);

:::::: The code at line 332 was first introduced by commit
:::::: e65845235c8120be63001fc1a4ac00c819194bbe [PATCH] Kprobes: Track kprobe on a per_cpu basis - base changes

:::::: TO: Ananth N Mavinakayanahalli <ananth@...ibm.com>
:::::: CC: Linus Torvalds <torvalds@...osdl.org>

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