[linux-next:master 6625/7194] include/linux/kprobes.h:477:9: error: implicit declaration of function 'kprobe_fault_handler'; did you mean 'kprobe_page_fault'?

[linux-next:master 6625/7194] include/linux/kprobes.h:477:9: error: implicit declaration of function 'kprobe_fault_handler'; did you mean 'kprobe_page_fault'?

[kbuild test robot]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   1c6b40509daf5190b1fd2c758649f7df1da4827b
commit: 7df81401e5edf8079c61b99f00b1ce683308d47a [6625/7194] mm, kprobes: generalize and rename notify_page_fault() as kprobe_page_fault()
config: mips-allmodconfig (attached as .config)
compiler: mips-linux-gcc (GCC) 7.4.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 7df81401e5edf8079c61b99f00b1ce683308d47a
        # save the attached .config to linux build tree
        GCC_VERSION=7.4.0 make.cross ARCH=mips 

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   In file included from arch/mips//kernel/traps.c:36:0:
   include/linux/kprobes.h: In function 'kprobe_page_fault':
>> include/linux/kprobes.h:477:9: error: implicit declaration of function 'kprobe_fault_handler'; did you mean 'kprobe_page_fault'? [-Werror=implicit-function-declaration]
     return kprobe_fault_handler(regs, trap);
            ^~~~~~~~~~~~~~~~~~~~
            kprobe_page_fault
   cc1: all warnings being treated as errors
--
   In file included from arch/mips//kernel/kprobes.c:14:0:
   include/linux/kprobes.h: In function 'kprobe_page_fault':
>> include/linux/kprobes.h:477:9: error: implicit declaration of function 'kprobe_fault_handler'; did you mean 'kprobe_page_fault'? [-Werror=implicit-function-declaration]
     return kprobe_fault_handler(regs, trap);
            ^~~~~~~~~~~~~~~~~~~~
            kprobe_page_fault
   arch/mips//kernel/kprobes.c: At top level:
>> arch/mips//kernel/kprobes.c:401:19: error: static declaration of 'kprobe_fault_handler' follows non-static declaration
    static inline int kprobe_fault_handler(struct pt_regs *regs, int trapnr)
                      ^~~~~~~~~~~~~~~~~~~~
   In file included from arch/mips//kernel/kprobes.c:14:0:
   include/linux/kprobes.h:477:9: note: previous implicit declaration of 'kprobe_fault_handler' was here
     return kprobe_fault_handler(regs, trap);
            ^~~~~~~~~~~~~~~~~~~~
   cc1: all warnings being treated as errors
--
   In file included from arch/mips/kernel/kprobes.c:14:0:
   include/linux/kprobes.h: In function 'kprobe_page_fault':
>> include/linux/kprobes.h:477:9: error: implicit declaration of function 'kprobe_fault_handler'; did you mean 'kprobe_page_fault'? [-Werror=implicit-function-declaration]
     return kprobe_fault_handler(regs, trap);
            ^~~~~~~~~~~~~~~~~~~~
            kprobe_page_fault
   arch/mips/kernel/kprobes.c: At top level:
   arch/mips/kernel/kprobes.c:401:19: error: static declaration of 'kprobe_fault_handler' follows non-static declaration
    static inline int kprobe_fault_handler(struct pt_regs *regs, int trapnr)
                      ^~~~~~~~~~~~~~~~~~~~
   In file included from arch/mips/kernel/kprobes.c:14:0:
   include/linux/kprobes.h:477:9: note: previous implicit declaration of 'kprobe_fault_handler' was here
     return kprobe_fault_handler(regs, trap);
            ^~~~~~~~~~~~~~~~~~~~
   cc1: all warnings being treated as errors

vim +477 include/linux/kprobes.h

   460	
   461	/* Returns true if kprobes handled the fault */
   462	static nokprobe_inline bool kprobe_page_fault(struct pt_regs *regs,
   463						      unsigned int trap)
   464	{
   465		if (!kprobes_built_in())
   466			return false;
   467		if (user_mode(regs))
   468			return false;
   469		/*
   470		 * To be potentially processing a kprobe fault and to be allowed
   471		 * to call kprobe_running(), we have to be non-preemptible.
   472		 */
   473		if (preemptible())
   474			return false;
   475		if (!kprobe_running())
   476			return false;
 > 477		return kprobe_fault_handler(regs, trap);
   478	}
   479	

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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