tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 34560ced20599a01660a693f464c7c7dc83db1d9 commit: 7bc04ce6b914a06d5823509d1de237787c58e649 [8048/11508] Makefile: Enable -Wimplicit-fallthrough for Clang config: mips-randconfig-r016-20210903 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project c9948e9254fbb6ea00f66c7b4542311d21e060be) 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 mips cross compiling tool for clang build # apt-get install binutils-mips-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=7bc04ce6b914a06d5823509d1de237787c58e649 git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 7bc04ce6b914a06d5823509d1de237787c58e649 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=mips If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): arch/mips/alchemy/devboards/db1550.c:56:12: warning: no previous prototype for function 'db1550_board_setup' [-Wmissing-prototypes] int __init db1550_board_setup(void) ^ arch/mips/alchemy/devboards/db1550.c:56:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int __init db1550_board_setup(void) ^ static >> arch/mips/alchemy/devboards/db1550.c:69:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough] case BCSR_WHOAMI_DB1550: ^ arch/mips/alchemy/devboards/db1550.c:69:2: note: insert 'break;' to avoid fall-through case BCSR_WHOAMI_DB1550: ^ break; arch/mips/alchemy/devboards/db1550.c:500:12: warning: no previous prototype for function 'db1550_pci_setup' [-Wmissing-prototypes] int __init db1550_pci_setup(int id) ^ arch/mips/alchemy/devboards/db1550.c:500:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int __init db1550_pci_setup(int id) ^ static arch/mips/alchemy/devboards/db1550.c:581:12: warning: no previous prototype for function 'db1550_dev_setup' [-Wmissing-prototypes] int __init db1550_dev_setup(void) ^ arch/mips/alchemy/devboards/db1550.c:581:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int __init db1550_dev_setup(void) ^ static 4 warnings generated. -- >> drivers/pcmcia/db1xxx_ss.c:359:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough] case 3: ^ drivers/pcmcia/db1xxx_ss.c:359:2: note: insert 'break;' to avoid fall-through case 3: ^ break; 1 warning generated. vim +69 arch/mips/alchemy/devboards/db1550.c f869d42e580f62 Manuel Lauss 2011-11-10 55 bd8510df881f63 Manuel Lauss 2012-09-13 56 int __init db1550_board_setup(void) f869d42e580f62 Manuel Lauss 2011-11-10 57 { f869d42e580f62 Manuel Lauss 2011-11-10 58 unsigned short whoami; f869d42e580f62 Manuel Lauss 2011-11-10 59 f869d42e580f62 Manuel Lauss 2011-11-10 60 bcsr_init(DB1550_BCSR_PHYS_ADDR, f869d42e580f62 Manuel Lauss 2011-11-10 61 DB1550_BCSR_PHYS_ADDR + DB1550_BCSR_HEXLED_OFS); f869d42e580f62 Manuel Lauss 2011-11-10 62 24e8c1a611a706 Manuel Lauss 2012-09-14 63 whoami = bcsr_read(BCSR_WHOAMI); /* PB1550 hexled offset differs */ 970e268d6ed1f1 Manuel Lauss 2014-02-20 64 switch (BCSR_WHOAMI_BOARD(whoami)) { 970e268d6ed1f1 Manuel Lauss 2014-02-20 65 case BCSR_WHOAMI_PB1550_SDR: 970e268d6ed1f1 Manuel Lauss 2014-02-20 66 case BCSR_WHOAMI_PB1550_DDR: 24e8c1a611a706 Manuel Lauss 2012-09-14 67 bcsr_init(PB1550_BCSR_PHYS_ADDR, 24e8c1a611a706 Manuel Lauss 2012-09-14 68 PB1550_BCSR_PHYS_ADDR + PB1550_BCSR_HEXLED_OFS); 970e268d6ed1f1 Manuel Lauss 2014-02-20 @69 case BCSR_WHOAMI_DB1550: 970e268d6ed1f1 Manuel Lauss 2014-02-20 70 break; 970e268d6ed1f1 Manuel Lauss 2014-02-20 71 default: 970e268d6ed1f1 Manuel Lauss 2014-02-20 72 return -ENODEV; 970e268d6ed1f1 Manuel Lauss 2014-02-20 73 } 24e8c1a611a706 Manuel Lauss 2012-09-14 74 24e8c1a611a706 Manuel Lauss 2012-09-14 75 pr_info("Alchemy/AMD %s Board, CPLD Rev %d Board-ID %d " \ 24e8c1a611a706 Manuel Lauss 2012-09-14 76 "Daughtercard ID %d\n", get_system_type(), f869d42e580f62 Manuel Lauss 2011-11-10 77 (whoami >> 4) & 0xf, (whoami >> 8) & 0xf, whoami & 0xf); f869d42e580f62 Manuel Lauss 2011-11-10 78 f869d42e580f62 Manuel Lauss 2011-11-10 79 db1550_hw_setup(); bd8510df881f63 Manuel Lauss 2012-09-13 80 return 0; f869d42e580f62 Manuel Lauss 2011-11-10 81 } f869d42e580f62 Manuel Lauss 2011-11-10 82 :::::: The code at line 69 was first introduced by commit :::::: 970e268d6ed1f1799829cc0c87ea271a9e127e79 MIPS: Alchemy: Unify Devboard support. :::::: TO: Manuel Lauss <manuel.lauss@xxxxxxxxx> :::::: CC: Ralf Baechle <ralf@xxxxxxxxxxxxxx> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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