Hi Tiezhu,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[also build test WARNING on v6.2-rc3 next-20230113]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Tiezhu-Yang/LoongArch-Simulate-branch-and-PC-instructions/20230114-173012
patch link:    https://lore.kernel.org/r/1673688444-24251-4-git-send-email-yangtiezhu%40loongson.cn
patch subject: [PATCH v11 3/6] LoongArch: Add kretprobe support
config: loongarch-allmodconfig
compiler: loongarch64-linux-gcc (GCC) 12.1.0
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
        # https://github.com/intel-lab-lkp/linux/commit/da766ea35a574bece74a5068aad708b5773b2981
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Tiezhu-Yang/LoongArch-Simulate-branch-and-PC-instructions/20230114-173012
        git checkout da766ea35a574bece74a5068aad708b5773b2981
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=loongarch olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=loongarch SHELL=/bin/bash arch/loongarch/kernel/

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

Note: functions only called from assembly code should be annotated with the asmlinkage attribute
All warnings (new ones prefixed by >>):

>> arch/loongarch/kernel/kprobes.c:376:14: warning: no previous prototype for 'trampoline_probe_handler' [-Wmissing-prototypes]
     376 | void __used *trampoline_probe_handler(struct pt_regs *regs)
         |              ^~~~~~~~~~~~~~~~~~~~~~~~


vim +/trampoline_probe_handler +376 arch/loongarch/kernel/kprobes.c

   374	
   375	/* Called from __kretprobe_trampoline */
 > 376	void __used *trampoline_probe_handler(struct pt_regs *regs)
   377	{
   378		return (void *)kretprobe_trampoline_handler(regs, NULL);
   379	}
   380	NOKPROBE_SYMBOL(trampoline_probe_handler);
   381	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests