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Subject[csky-linux:v5.14-rc2-of-delay-cpu-available 3/5] arch/riscv/mm/init.c:905:13: warning: no previous prototype for function 'pbmt_init'
tree:   https://github.com/c-sky/csky-linux v5.14-rc2-of-delay-cpu-available
head: f6c22a2278708ce7227c42294e351ff53e8b279a
commit: 04be54eab2e8df9ac47f9d7e6ede22953f9f78e2 [3/5] riscv: pgtable: Add "PBMT" extension supported
config: riscv-randconfig-r035-20210727 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project c658b472f3e61e1818e1909bf02f3d65470018a5)
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://github.com/c-sky/csky-linux/commit/04be54eab2e8df9ac47f9d7e6ede22953f9f78e2
git remote add csky-linux https://github.com/c-sky/csky-linux
git fetch --no-tags csky-linux v5.14-rc2-of-delay-cpu-available
git checkout 04be54eab2e8df9ac47f9d7e6ede22953f9f78e2
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv

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

All warnings (new ones prefixed by >>):

>> arch/riscv/mm/init.c:905:13: warning: no previous prototype for function 'pbmt_init' [-Wmissing-prototypes]
void __init pbmt_init(void)
^
arch/riscv/mm/init.c:905:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void __init pbmt_init(void)
^
static
1 warning generated.


vim +/pbmt_init +905 arch/riscv/mm/init.c

903
904 #ifdef CONFIG_64BIT
> 905 void __init pbmt_init(void)
906 {
907 struct device_node *cpu;
908
909 cpu = of_find_node_by_path("/cpus");
910 if (!cpu || of_property_read_bool(cpu, "pbmt-extension"))
911 return;
912
913 memset(&__riscv_pbmt, 0, sizeof(__riscv_pbmt));
914 }
915 #endif
916

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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