tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 270315b8235e3d10c2e360cff56c2f9e0915a252 commit: 5b552b198c2557295becd471bff53bb520fefee5 media: atomisp: re-enable warnings again date: 4 months ago config: x86_64-randconfig-a003-20201020 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project ea693a162786d933863ab079648d4261ac0ead47) 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 x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # 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 5b552b198c2557295becd471bff53bb520fefee5 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 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 ia_css_isys_ibuf_rmgr_init(void) ^ drivers/staging/media/atomisp/pci/runtime/isys/src/ibuf_ctrl_rmgr.c:34:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void ia_css_isys_ibuf_rmgr_init(void) ^ static void ia_css_isys_ibuf_rmgr_uninit(void) ^ drivers/staging/media/atomisp/pci/runtime/isys/src/ibuf_ctrl_rmgr.c:40:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void ia_css_isys_ibuf_rmgr_uninit(void) ^ static bool ia_css_isys_ibuf_rmgr_acquire( ^ drivers/staging/media/atomisp/pci/runtime/isys/src/ibuf_ctrl_rmgr.c:46:1: note: declare 'static' if the function is not intended to be used outside of this translation unit bool ia_css_isys_ibuf_rmgr_acquire( ^ static void ia_css_isys_ibuf_rmgr_release( ^ drivers/staging/media/atomisp/pci/runtime/isys/src/ibuf_ctrl_rmgr.c:106:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void ia_css_isys_ibuf_rmgr_release( ^ static 4 warnings generated. vim +/ia_css_isys_ibuf_rmgr_init +34 drivers/staging/media/atomisp/pci/runtime/isys/src/ibuf_ctrl_rmgr.c ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 33 ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 @34 void ia_css_isys_ibuf_rmgr_init(void) ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 35 { ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 36 memset(&ibuf_rsrc, 0, sizeof(ibuf_rsrc)); ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 37 ibuf_rsrc.free_size = MAX_INPUT_BUFFER_SIZE; ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 38 } ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 39 ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 @40 void ia_css_isys_ibuf_rmgr_uninit(void) ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 41 { ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 42 memset(&ibuf_rsrc, 0, sizeof(ibuf_rsrc)); ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 43 ibuf_rsrc.free_size = MAX_INPUT_BUFFER_SIZE; ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 44 } ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 45 ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 @46 bool ia_css_isys_ibuf_rmgr_acquire( bdfe0beb95eebc8 drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 47 u32 size, ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 48 uint32_t *start_addr) ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 49 { ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 50 bool retval = false; ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 51 bool input_buffer_found = false; bdfe0beb95eebc8 drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 52 u32 aligned_size; ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 53 ibuf_handle_t *handle = NULL; bdfe0beb95eebc8 drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 54 u16 i; ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 55 bdfe0beb95eebc8 drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 56 assert(start_addr); ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 57 assert(size > 0); ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 58 ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 59 aligned_size = (size + (IBUF_ALIGN - 1)) & ~(IBUF_ALIGN - 1); ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 60 ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 61 /* Check if there is an available un-used handle with the size ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 62 * that will fulfill the request. ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 63 */ ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 64 if (ibuf_rsrc.num_active < ibuf_rsrc.num_allocated) { ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 65 for (i = 0; i < ibuf_rsrc.num_allocated; i++) { ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 66 handle = getHandle(i); ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 67 if (!handle->active) { ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 68 if (handle->size >= aligned_size) { ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 69 handle->active = true; ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 70 input_buffer_found = true; ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 71 ibuf_rsrc.num_active++; ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 72 break; ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 73 } ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 74 } ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 75 } ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 76 } ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 77 ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 78 if (!input_buffer_found) { ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 79 /* There were no available handles that fulfilled the ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 80 * request. Allocate a new handle with the requested size. ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 81 */ ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 82 if ((ibuf_rsrc.num_allocated < MAX_IBUF_HANDLES) && ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 83 (ibuf_rsrc.free_size >= aligned_size)) { ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 84 handle = getHandle(ibuf_rsrc.num_allocated); ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 85 handle->start_addr = ibuf_rsrc.free_start_addr; ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 86 handle->size = aligned_size; ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 87 handle->active = true; ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 88 ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 89 ibuf_rsrc.free_start_addr += aligned_size; ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 90 ibuf_rsrc.free_size -= aligned_size; ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 91 ibuf_rsrc.num_active++; ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 92 ibuf_rsrc.num_allocated++; ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 93 ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 94 input_buffer_found = true; ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 95 } ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 96 } ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 97 ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 98 if (input_buffer_found && handle) { ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 99 *start_addr = handle->start_addr; ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 100 retval = true; ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 101 } ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 102 ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 103 return retval; ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 104 } ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 105 ad85094b293e40e drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/isys/src/ibuf_ctrl_rmgr.c Mauro Carvalho Chehab 2020-04-19 @106 void ia_css_isys_ibuf_rmgr_release( :::::: The code at line 34 was first introduced by commit :::::: ad85094b293e40e7a2f831b0311a389d952ebd5e Revert "media: staging: atomisp: Remove driver" :::::: TO: Mauro Carvalho Chehab <mchehab+huawei(a)kernel.org&gt; :::::: CC: Mauro Carvalho Chehab <mchehab+huawei(a)kernel.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org