[kbuild-all] [mkp-scsi:queue 8/24] drivers/scsi/ufs/ufs-mediatek.c:181:5: warning: no previous prototype for 'ufs_mtk_wait_link_state'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/mkp/scsi.git queue head: b1bf66d1d5a8fcb54f0e584db5d196ef015b5172 commit: 9006e3986f6689897c2f1ede2671656b1cb41582 [8/24] scsi: ufs-mediatek: Do not gate clocks if auto-hibern8 is not entered yet config: arm-allyesconfig (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0 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 git checkout 9006e3986f6689897c2f1ede2671656b1cb41582 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm 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 >>, old ones prefixed by <<): 181 | int ufs_mtk_wait_link_state(struct ufs_hba *hba, u32 state, | ^~~~~~~~~~~~~~~~~~~~~~~ vim +/ufs_mtk_wait_link_state +181 drivers/scsi/ufs/ufs-mediatek.c 180 182 unsigned long max_wait_ms) 183 { 184 ktime_t timeout, time_checked; 185 u32 val; 186 187 timeout = ktime_add_us(ktime_get(), ms_to_ktime(max_wait_ms)); 188 do { 189 time_checked = ktime_get(); 190 ufshcd_writel(hba, 0x20, REG_UFS_DEBUG_SEL); 191 val = ufshcd_readl(hba, REG_UFS_PROBE); 192 val = val >> 28; 193 194 if (val == state) 195 return 0; 196 197 /* Sleep for max. 200us */ 198 usleep_range(100, 200); 199 } while (ktime_before(time_checked, timeout)); 200 201 if (val == state) 202 return 0; 203 204 return -ETIMEDOUT; 205 } 206 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org