linux-kernel - Re: [PATCH 2/7] arm: ftrace: Add call modify mechanism

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Date:   Wed, 7 Dec 2016 18:37:26 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Abel Vesa <abelvesa@...ux.com>
Cc:     kbuild-all@...org, linux@...linux.org.uk, jpoimboe@...hat.com,
        jeyu@...hat.com, jikos@...nel.org, mbenes@...e.cz,
        pmladek@...e.com, rostedt@...dmis.org, mingo@...hat.com,
        gregkh@...uxfoundation.org, geert+renesas@...der.be,
        davem@...emloft.net, akpm@...ux-foundation.org,
        emil.l.velikov@...il.com, mchehab@...nel.org, linux@...ck-us.net,
        ard.biesheuvel@...aro.org, jens.wiklander@...aro.org,
        jean-philippe.brucker@....com, viro@...iv.linux.org.uk,
        stefano.stabellini@...citrix.com, chris.brandt@...esas.com,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        live-patching@...r.kernel.org, Abel Vesa <abelvesa@...ux.com>
Subject: Re: [PATCH 2/7] arm: ftrace: Add call modify mechanism

Hi Abel,

[auto build test ERROR on linus/master]
[also build test ERROR on v4.9-rc8 next-20161206]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Abel-Vesa/arm-Add-livepatch-support/20161207-074210
config: arm-allmodconfig (attached as .config)
compiler: arm-linux-gnueabi-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=arm 

Note: the linux-review/Abel-Vesa/arm-Add-livepatch-support/20161207-074210 HEAD 49113edc744f38a682a4afa9e904384bb00f2988 builds fine.
      It only hurts bisectibility.

All errors (new ones prefixed by >>):

>> arch/arm/kernel/ftrace.c:163:5: error: redefinition of 'ftrace_modify_call'
    int ftrace_modify_call(struct dyn_ftrace *rec, unsigned long old_addr,
        ^~~~~~~~~~~~~~~~~~
   In file included from arch/arm/kernel/ftrace.c:15:0:
   include/linux/ftrace.h:595:19: note: previous definition of 'ftrace_modify_call' was here
    static inline int ftrace_modify_call(struct dyn_ftrace *rec, unsigned long old_addr,
                      ^~~~~~~~~~~~~~~~~~

vim +/ftrace_modify_call +163 arch/arm/kernel/ftrace.c

   157		}
   158	#endif
   159	
   160		return ret;
   161	}
   162	
 > 163	int ftrace_modify_call(struct dyn_ftrace *rec, unsigned long old_addr,
   164		       unsigned long addr)
   165	{
   166		unsigned long pc = rec->ip;

---
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