kernel test robot writes: > tree: https://git.kernel.org/pub/scm/linux/kernel/git/printk/linux.git for-5.15-printk-index > head: ad7d61f159db73974f1b0352f21afe04b0bbd920 > commit: 337015573718b161891a3473d25f59273f2e626b [4/5] printk: Userspace format indexing support > config: arc-allyesconfig (attached as .config) > compiler: arceb-elf-gcc (GCC) 10.3.0 > 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/printk/linux.git/commit/?... > git remote add printk https://git.kernel.org/pub/scm/linux/kernel/git/printk/linux.git > git fetch --no-tags printk for-5.15-printk-index > git checkout 337015573718b161891a3473d25f59273f2e626b > # save the attached .config to linux build tree > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross ARCH=arc > > 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 >>): > > > > kernel/printk/index.c:140:6: warning: no previous prototype for 'pi_create_file' [-Wmissing-prototypes] > 140 | void pi_create_file(struct module *mod) > | ^~~~~~~~~~~~~~ > > > kernel/printk/index.c:146:6: warning: no previous prototype for 'pi_remove_file' [-Wmissing-prototypes] > 146 | void pi_remove_file(struct module *mod) > | ^~~~~~~~~~~~~~ Ah, I missed `static inline', which causes the compiler to think we want to export it even though we don't. diff --git kernel/printk/index.c kernel/printk/index.c index ca062f5e1779..e340e0a8b847 100644 --- kernel/printk/index.c +++ kernel/printk/index.c @@ -137,13 +137,13 @@ static const char *pi_get_module_name(struct module *mod) } #endif -void pi_create_file(struct module *mod) +static inline void pi_create_file(struct module *mod) { debugfs_create_file(pi_get_module_name(mod), 0444, dfs_index, mod, &dfs_index_fops); } -void pi_remove_file(struct module *mod) +static inline void pi_remove_file(struct module *mod) { debugfs_remove(debugfs_lookup(pi_get_module_name(mod), dfs_index)); }