Hi Adrian, FYI, the error/warning still remains. tree: https://github.com/Freescale/linux-fslc pr/391 head: 48afde5dc8ee425a1517ac38d6eca0fec76ad57e commit: cdfd304a32248295f7d77f61d32137f1bb5bf64e [11826/19640] MLK-24423: sound: soc: fsl: imx pdm: fixed mclk improve voice config: h8300-allyesconfig (attached as .config) compiler: h8300-linux-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 # https://github.com/Freescale/linux-fslc/commit/cdfd304a32248295f7d77f61d3... git remote add freescale-fslc https://github.com/Freescale/linux-fslc git fetch --no-tags freescale-fslc pr/391 git checkout cdfd304a32248295f7d77f61d32137f1bb5bf64e # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=h8300 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): In file included from include/linux/kernel.h:11, from include/linux/list.h:9, from include/linux/module.h:9, from sound/soc/fsl/imx-pdm.c:12: include/linux/scatterlist.h: In function 'sg_set_buf': include/asm-generic/page.h:93:50: warning: ordered comparison of pointer with null pointer [-Wextra] 93 | #define virt_addr_valid(kaddr) (((void *)(kaddr) >= (void *)PAGE_OFFSET) && \ | ^~ include/linux/compiler.h:78:42: note: in definition of macro 'unlikely' 78 | # define unlikely(x) __builtin_expect(!!(x), 0) | ^ include/linux/scatterlist.h:143:2: note: in expansion of macro 'BUG_ON' 143 | BUG_ON(!virt_addr_valid(buf)); | ^~~~~~ include/linux/scatterlist.h:143:10: note: in expansion of macro 'virt_addr_valid' 143 | BUG_ON(!virt_addr_valid(buf)); | ^~~~~~~~~~~~~~~ In file included from ./arch/h8300/include/generated/asm/div64.h:1, from include/linux/kernel.h:18, from include/linux/list.h:9, from include/linux/module.h:9, from sound/soc/fsl/imx-pdm.c:12: sound/soc/fsl/imx-pdm.c: In function 'imx_pdm_mic_hw_params': include/asm-generic/div64.h:226:28: warning: comparison of distinct pointer types lacks a cast 226 | (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \ | ^~ sound/soc/fsl/imx-pdm.c:241:16: note: in expansion of macro 'do_div' 241 | mclk_freq = (do_div(sample_rate, 8000) ? | ^~~~~~ In file included from include/linux/kernel.h:11, from include/linux/list.h:9, from include/linux/module.h:9, from sound/soc/fsl/imx-pdm.c:12: include/asm-generic/div64.h:239:25: warning: right shift count >= width of type [-Wshift-count-overflow] 239 | } else if (likely(((n) >> 32) == 0)) { \ | ^~ include/linux/compiler.h:77:40: note: in definition of macro 'likely' 77 | # define likely(x) __builtin_expect(!!(x), 1) | ^ sound/soc/fsl/imx-pdm.c:241:16: note: in expansion of macro 'do_div' 241 | mclk_freq = (do_div(sample_rate, 8000) ? | ^~~~~~ In file included from ./arch/h8300/include/generated/asm/div64.h:1, from include/linux/kernel.h:18, from include/linux/list.h:9, from include/linux/module.h:9, from sound/soc/fsl/imx-pdm.c:12: 243 | __rem = __div64_32(&(n), __base); \ | ^~~~ | | | unsigned int * sound/soc/fsl/imx-pdm.c:241:16: note: in expansion of macro 'do_div' 241 | mclk_freq = (do_div(sample_rate, 8000) ? | ^~~~~~ include/asm-generic/div64.h:217:38: note: expected 'uint64_t *' {aka 'long long unsigned int *'} but argument is of type 'unsigned int *' 217 | extern uint32_t __div64_32(uint64_t *dividend, uint32_t divisor); | ~~~~~~~~~~^~~~~~~~ cc1: some warnings being treated as errors vim +/__div64_32 +243 include/asm-generic/div64.h ^1da177e4c3f41 Linus Torvalds 2005-04-16 219 ^1da177e4c3f41 Linus Torvalds 2005-04-16 220 /* The unnecessary pointer compare is there ^1da177e4c3f41 Linus Torvalds 2005-04-16 221 * to check for type safety (n must be 64bit) ^1da177e4c3f41 Linus Torvalds 2005-04-16 222 */ ^1da177e4c3f41 Linus Torvalds 2005-04-16 223 # define do_div(n,base) ({ \ ^1da177e4c3f41 Linus Torvalds 2005-04-16 224 uint32_t __base = (base); \ ^1da177e4c3f41 Linus Torvalds 2005-04-16 225 uint32_t __rem; \ ^1da177e4c3f41 Linus Torvalds 2005-04-16 226 (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \ 911918aa7ef6f8 Nicolas Pitre 2015-11-02 227 if (__builtin_constant_p(__base) && \ 911918aa7ef6f8 Nicolas Pitre 2015-11-02 228 is_power_of_2(__base)) { \ 911918aa7ef6f8 Nicolas Pitre 2015-11-02 229 __rem = (n) & (__base - 1); \ 911918aa7ef6f8 Nicolas Pitre 2015-11-02 230 (n) >>= ilog2(__base); \ 461a5e51060c93 Nicolas Pitre 2015-10-30 231 } else if (__div64_const32_is_OK && \ 461a5e51060c93 Nicolas Pitre 2015-10-30 232 __builtin_constant_p(__base) && \ 461a5e51060c93 Nicolas Pitre 2015-10-30 233 __base != 0) { \ 461a5e51060c93 Nicolas Pitre 2015-10-30 234 uint32_t __res_lo, __n_lo = (n); \ 461a5e51060c93 Nicolas Pitre 2015-10-30 235 (n) = __div64_const32(n, __base); \ 461a5e51060c93 Nicolas Pitre 2015-10-30 236 /* the remainder can be computed with 32-bit regs */ \ 461a5e51060c93 Nicolas Pitre 2015-10-30 237 __res_lo = (n); \ 461a5e51060c93 Nicolas Pitre 2015-10-30 238 __rem = __n_lo - __res_lo * __base; \ 911918aa7ef6f8 Nicolas Pitre 2015-11-02 239 } else if (likely(((n) >> 32) == 0)) { \ ^1da177e4c3f41 Linus Torvalds 2005-04-16 240 __rem = (uint32_t)(n) % __base; \ ^1da177e4c3f41 Linus Torvalds 2005-04-16 241 (n) = (uint32_t)(n) / __base; \ ^1da177e4c3f41 Linus Torvalds 2005-04-16 242 } else \ ^1da177e4c3f41 Linus Torvalds 2005-04-16 @243 __rem = __div64_32(&(n), __base); \ ^1da177e4c3f41 Linus Torvalds 2005-04-16 244 __rem; \ ^1da177e4c3f41 Linus Torvalds 2005-04-16 245 }) ^1da177e4c3f41 Linus Torvalds 2005-04-16 246 :::::: The code at line 243 was first introduced by commit :::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2 :::::: TO: Linus Torvalds <torvalds(a)ppc970.osdl.org&gt; :::::: CC: Linus Torvalds <torvalds(a)ppc970.osdl.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org