tree: https://github.com/Freescale/linux-fslc pr/429 head: ff4f45cc3eed2c8292af1f339be1dc24a08d56c7 commit: 9fcedb7df92f0e852d41895c8c25fa15290797b5 [2/10] MA-7633-2 [Android-Reboot]reboot to fastboot\recovery mode config: arm-randconfig-r033-20210913 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 261cbe98c38f8c1ee1a482fe76511110e790f58a) 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 arm cross compiling tool for clang build # apt-get install binutils-arm-linux-gnueabi # https://github.com/Freescale/linux-fslc/commit/9fcedb7df92f0e852d41895c8c... git remote add freescale-fslc https://github.com/Freescale/linux-fslc git fetch --no-tags freescale-fslc pr/429 git checkout 9fcedb7df92f0e852d41895c8c25fa15290797b5 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang 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 >>): void do_switch_recovery(void) ^ arch/arm/mach-imx/reboot.c:31:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void do_switch_recovery(void) ^ static void do_switch_fastboot(void) ^ arch/arm/mach-imx/reboot.c:61:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void do_switch_fastboot(void) ^ static 2 warnings generated. vim +/do_switch_recovery +31 arch/arm/mach-imx/reboot.c 30 32 { 33 u32 reg; 34 void *addr; 35 struct clk *snvs_root; 36 if (cpu_is_imx6()) { 37 addr = ioremap(MX6_SNVS_BASE_ADDR, MX6_SNVS_SIZE); 38 if (!addr) { 39 pr_warn("SNVS ioremap failed!\n"); 40 return; 41 } 42 reg = __raw_readl(addr + MX6_SNVS_LPGPR); 43 reg |= ANDROID_RECOVERY_BOOT; 44 __raw_writel(reg, (addr + MX6_SNVS_LPGPR)); 45 } else { 46 snvs_root = clk_get_sys("imx-snvs.0", "snvs"); 47 addr = ioremap(MX7_SNVS_BASE_ADDR, MX7_SNVS_SIZE); 48 if (!addr) { 49 pr_warn("SNVS ioremap failed!\n"); 50 return; 51 } 52 clk_enable(snvs_root); 53 reg = __raw_readl(addr + MX7_SNVS_LPGPR); 54 reg |= ANDROID_RECOVERY_BOOT; 55 __raw_writel(reg, (addr + MX7_SNVS_LPGPR)); 56 clk_disable(snvs_root); 57 } 58 iounmap(addr); 59 } 60 62 { 63 u32 reg; 64 void *addr; 65 struct clk *snvs_root; 66 if (cpu_is_imx6()) { 67 addr = ioremap(MX6_SNVS_BASE_ADDR, MX6_SNVS_SIZE); 68 if (!addr) { 69 pr_warn("SNVS ioremap failed!\n"); 70 return; 71 } 72 reg = __raw_readl(addr + MX6_SNVS_LPGPR); 73 reg |= ANDROID_FASTBOOT_BOOT; 74 __raw_writel(reg, addr + MX6_SNVS_LPGPR); 75 } else { 76 snvs_root = clk_get_sys("imx-snvs.0", "snvs"); 77 addr = ioremap(MX7_SNVS_BASE_ADDR, MX7_SNVS_SIZE); 78 if (!addr) { 79 pr_warn("SNVS ioremap failed!\n"); 80 return; 81 } 82 clk_enable(snvs_root); 83 reg = __raw_readl(addr + MX7_SNVS_LPGPR); 84 reg |= ANDROID_FASTBOOT_BOOT; 85 __raw_writel(reg, addr + MX7_SNVS_LPGPR); 86 clk_disable(snvs_root); 87 } 88 iounmap(addr); 89 } 90 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org