linux-kernel - Re: [PATCH tip/master v2] kprobes: extable: Identify kprobes' insn-slots as kernel text area

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Message-ID: <201612270109.bHsESDIb%fengguang.wu@intel.com>
Date:   Tue, 27 Dec 2016 01:46:12 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Masami Hiramatsu <mhiramat@...nel.org>
Cc:     kbuild-all@...org, Ingo Molnar <mingo@...hat.com>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        linux-kernel@...r.kernel.org,
        Peter Zijlstra <peterz@...radead.org>,
        Ananth N Mavinakayanahalli <ananth@...ux.vnet.ibm.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        "H . Peter Anvin" <hpa@...or.com>,
        Andrey Konovalov <andreyknvl@...gle.com>
Subject: Re: [PATCH tip/master v2] kprobes: extable: Identify kprobes'
 insn-slots as kernel text area

Hi Masami,

[auto build test ERROR on tip/master]

url:    https://github.com/0day-ci/linux/commits/Masami-Hiramatsu/kprobes-extable-Identify-kprobes-insn-slots-as-kernel-text-area/20161226-233830
config: sh-r7785rp_defconfig (attached as .config)
compiler: sh4-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705
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
        # save the attached .config to linux build tree
        make.cross ARCH=sh 

All errors (new ones prefixed by >>):

   kernel/built-in.o: In function `init_kernel_text':
>> kernel/extable.c:64: undefined reference to `__is_insn_slot_addr'
>> kernel/extable.c:64: undefined reference to `kprobe_insn_slots'
   kernel/built-in.o: In function `kernel_text_address':
   kernel/extable.c:134: undefined reference to `__is_insn_slot_addr'
   kernel/extable.c:134: undefined reference to `kprobe_insn_slots'

vim +64 kernel/extable.c

^1da177e Linus Torvalds 2005-04-16  58  		e = search_module_extables(addr);
^1da177e Linus Torvalds 2005-04-16  59  	return e;
^1da177e Linus Torvalds 2005-04-16  60  }
^1da177e Linus Torvalds 2005-04-16  61  
4a44bac1 Ingo Molnar    2009-03-19  62  static inline int init_kernel_text(unsigned long addr)
4a44bac1 Ingo Molnar    2009-03-19  63  {
4a44bac1 Ingo Molnar    2009-03-19 @64  	if (addr >= (unsigned long)_sinittext &&
5ecbe3c3 Helge Deller   2013-11-28  65  	    addr < (unsigned long)_einittext)
4a44bac1 Ingo Molnar    2009-03-19  66  		return 1;
4a44bac1 Ingo Molnar    2009-03-19  67  	return 0;

:::::: The code at line 64 was first introduced by commit
:::::: 4a44bac1f98223ed77e47bf3b42fcfd10cddd85f symbols, stacktrace: look up init symbols after module symbols

:::::: TO: Ingo Molnar <mingo@...e.hu>
:::::: CC: Ingo Molnar <mingo@...e.hu>

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