[kbuild-all] kernel/time/clocksource.c:1053:9: warning: no previous prototype for 'sysfs_get_uname'

Hi Arnd, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: cb690f5238d71f543f4ce874aa59237cf53a877c commit: 686092e7daaa9f43396c57ea0044799e47f0d9da parisc: use legacy_timer_tick date: 1 year ago config: parisc-buildonly-randconfig-r005-20210927 (attached as .config) compiler: hppa64-linux-gcc (GCC) 11.2.0 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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 686092e7daaa9f43396c57ea0044799e47f0d9da # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=parisc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): 1053 | ssize_t sysfs_get_uname(const char *buf, char *dst, size_t cnt) | ^~~~~~~~~~~~~~~ vim +/sysfs_get_uname +1053 kernel/time/clocksource.c 734efb467b31e56 John Stultz 2006-06-26 1052 891292a767c2453 Patrick Palka 2013-10-11 @1053 ssize_t sysfs_get_uname(const char *buf, char *dst, size_t cnt) 29b5407819f5973 Thomas Gleixner 2013-04-25 1054 { 29b5407819f5973 Thomas Gleixner 2013-04-25 1055 size_t ret = cnt; 29b5407819f5973 Thomas Gleixner 2013-04-25 1056 29b5407819f5973 Thomas Gleixner 2013-04-25 1057 /* strings from sysfs write are not 0 terminated! */ 29b5407819f5973 Thomas Gleixner 2013-04-25 1058 if (!cnt || cnt >= CS_NAME_LEN) 29b5407819f5973 Thomas Gleixner 2013-04-25 1059 return -EINVAL; 29b5407819f5973 Thomas Gleixner 2013-04-25 1060 29b5407819f5973 Thomas Gleixner 2013-04-25 1061 /* strip of \n: */ 29b5407819f5973 Thomas Gleixner 2013-04-25 1062 if (buf[cnt-1] == '\n') 29b5407819f5973 Thomas Gleixner 2013-04-25 1063 cnt--; 29b5407819f5973 Thomas Gleixner 2013-04-25 1064 if (cnt > 0) 29b5407819f5973 Thomas Gleixner 2013-04-25 1065 memcpy(dst, buf, cnt); 29b5407819f5973 Thomas Gleixner 2013-04-25 1066 dst[cnt] = 0; 29b5407819f5973 Thomas Gleixner 2013-04-25 1067 return ret; 29b5407819f5973 Thomas Gleixner 2013-04-25 1068 } 29b5407819f5973 Thomas Gleixner 2013-04-25 1069 :::::: The code at line 1053 was first introduced by commit :::::: 891292a767c2453af0e5be9465e95b06b4b29ebe time: Fix signedness bug in sysfs_get_uname() and its callers :::::: TO: Patrick Palka <patrick(a)parcs.ath.cx&gt; :::::: CC: John Stultz <john.stultz(a)linaro.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org