[linux-next:master 11855/12471] arch/riscv/net/bpf_jit_comp64.c:462:5: warning: no previous prototype for function 'rv_bpf_fixup_exception'

[kernel test robot <lkp@xxxxxxxxx>]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   503f375baa99edff894eb1a534d2ac0b4f799573
commit: 252c765bd764a246a8bd516fabf6d6123df4a24f [11855/12471] riscv, bpf: Add BPF exception tables
config: riscv-randconfig-r042-20211028 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 5db7568a6a1fcb408eb8988abdaff2a225a8eb72)
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
        # install riscv cross compiling tool for clang build
        # apt-get install binutils-riscv64-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=252c765bd764a246a8bd516fabf6d6123df4a24f
        git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
        git fetch --no-tags linux-next master
        git checkout 252c765bd764a246a8bd516fabf6d6123df4a24f
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=riscv 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All warnings (new ones prefixed by >>):

>> arch/riscv/net/bpf_jit_comp64.c:462:5: warning: no previous prototype for function 'rv_bpf_fixup_exception' [-Wmissing-prototypes]
   int rv_bpf_fixup_exception(const struct exception_table_entry *ex,
       ^
   arch/riscv/net/bpf_jit_comp64.c:462:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int rv_bpf_fixup_exception(const struct exception_table_entry *ex,
   ^
   static 
   1 warning generated.


vim +/rv_bpf_fixup_exception +462 arch/riscv/net/bpf_jit_comp64.c

   461	
 > 462	int rv_bpf_fixup_exception(const struct exception_table_entry *ex,
   463					struct pt_regs *regs)
   464	{
   465		off_t offset = FIELD_GET(BPF_FIXUP_OFFSET_MASK, ex->fixup);
   466		int regs_offset = FIELD_GET(BPF_FIXUP_REG_MASK, ex->fixup);
   467	
   468		*(unsigned long *)((void *)regs + pt_regmap[regs_offset]) = 0;
   469		regs->epc = (unsigned long)&ex->fixup - offset;
   470	
   471		return 1;
   472	}
   473	

---
0-DAY CI Kernel Test Service, Intel Corporation
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Attachment: .config.gz
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