Hi Olivier, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on linus/master] [cannot apply to v5.17-rc5 next-20220225] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Olivier-Langlois/io_uring-Add-support-for-napi_busy_poll/20220228-012140 base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 2293be58d6a18cab800e25e42081bacb75c05752 config: arc-randconfig-r043-20220227 (https://download.01.org/0day-ci/archive/20220228/202202280400.HHUsYqhX-lkp@xxxxxxxxx/config) compiler: arc-elf-gcc (GCC) 11.2.0 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/0day-ci/linux/commit/65e72f78c66272f7cf0e87dfeef88f5b79de2d91 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Olivier-Langlois/io_uring-Add-support-for-napi_busy_poll/20220228-012140 git checkout 65e72f78c66272f7cf0e87dfeef88f5b79de2d91 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arc SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): fs/io_uring.c: In function '__io_submit_flush_completions': fs/io_uring.c:2531:40: warning: variable 'prev' set but not used [-Wunused-but-set-variable] 2531 | struct io_wq_work_node *node, *prev; | ^~~~ In file included from ./arch/arc/include/generated/asm/div64.h:1, from include/linux/math.h:5, from include/linux/kernel.h:25, from fs/io_uring.c:42: fs/io_uring.c: In function 'io_adjust_busy_loop_timeout': >> include/asm-generic/div64.h:222:35: warning: comparison of distinct pointer types lacks a cast 222 | (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \ | ^~ fs/io_uring.c:7840:17: note: in expansion of macro 'do_div' 7840 | do_div(to, 1000); | ^~~~~~ vim +222 include/asm-generic/div64.h ^1da177e4c3f41 Linus Torvalds 2005-04-16 215 ^1da177e4c3f41 Linus Torvalds 2005-04-16 216 /* The unnecessary pointer compare is there ^1da177e4c3f41 Linus Torvalds 2005-04-16 217 * to check for type safety (n must be 64bit) ^1da177e4c3f41 Linus Torvalds 2005-04-16 218 */ ^1da177e4c3f41 Linus Torvalds 2005-04-16 219 # define do_div(n,base) ({ \ ^1da177e4c3f41 Linus Torvalds 2005-04-16 220 uint32_t __base = (base); \ ^1da177e4c3f41 Linus Torvalds 2005-04-16 221 uint32_t __rem; \ ^1da177e4c3f41 Linus Torvalds 2005-04-16 @222 (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \ 911918aa7ef6f8 Nicolas Pitre 2015-11-02 223 if (__builtin_constant_p(__base) && \ 911918aa7ef6f8 Nicolas Pitre 2015-11-02 224 is_power_of_2(__base)) { \ 911918aa7ef6f8 Nicolas Pitre 2015-11-02 225 __rem = (n) & (__base - 1); \ 911918aa7ef6f8 Nicolas Pitre 2015-11-02 226 (n) >>= ilog2(__base); \ c747ce4706190e Geert Uytterhoeven 2021-08-11 227 } else if (__builtin_constant_p(__base) && \ 461a5e51060c93 Nicolas Pitre 2015-10-30 228 __base != 0) { \ 461a5e51060c93 Nicolas Pitre 2015-10-30 229 uint32_t __res_lo, __n_lo = (n); \ 461a5e51060c93 Nicolas Pitre 2015-10-30 230 (n) = __div64_const32(n, __base); \ 461a5e51060c93 Nicolas Pitre 2015-10-30 231 /* the remainder can be computed with 32-bit regs */ \ 461a5e51060c93 Nicolas Pitre 2015-10-30 232 __res_lo = (n); \ 461a5e51060c93 Nicolas Pitre 2015-10-30 233 __rem = __n_lo - __res_lo * __base; \ 911918aa7ef6f8 Nicolas Pitre 2015-11-02 234 } else if (likely(((n) >> 32) == 0)) { \ ^1da177e4c3f41 Linus Torvalds 2005-04-16 235 __rem = (uint32_t)(n) % __base; \ ^1da177e4c3f41 Linus Torvalds 2005-04-16 236 (n) = (uint32_t)(n) / __base; \ c747ce4706190e Geert Uytterhoeven 2021-08-11 237 } else { \ ^1da177e4c3f41 Linus Torvalds 2005-04-16 238 __rem = __div64_32(&(n), __base); \ c747ce4706190e Geert Uytterhoeven 2021-08-11 239 } \ ^1da177e4c3f41 Linus Torvalds 2005-04-16 240 __rem; \ ^1da177e4c3f41 Linus Torvalds 2005-04-16 241 }) ^1da177e4c3f41 Linus Torvalds 2005-04-16 242 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
