[kbuild-all] [norov:find_bit_static 5/6] include/asm-generic/bitops/find.h:164:16: error: implicit declaration of function '__fls'; did you mean

tree: https://github.com/norov/linux find_bit_static head: a18d2664b9ad8a08be90d073ef0673f62d8a186e commit: 0cbe876d91e58013824b3628bd98ccf7ec1c87f4 [5/6] lib: add fast path for find_first_*_bit() and find_last_bit() config: sh-allmodconfig (attached as .config) compiler: sh4-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/norov/linux/commit/0cbe876d91e58013824b3628bd98ccf7ec1... git remote add norov https://github.com/norov/linux git fetch --no-tags norov find_bit_static git checkout 0cbe876d91e58013824b3628bd98ccf7ec1c87f4 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=sh 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 arch/sh/include/asm/bitops.h:61, from include/linux/bitops.h:50, from include/linux/kernel.h:11, from include/asm-generic/bug.h:20, from arch/sh/include/asm/bug.h:112, from include/linux/bug.h:5, from include/linux/page-flags.h:10, from kernel/bounds.c:10: include/asm-generic/bitops/find.h: In function 'find_last_bit': 164 | return val ? __fls(val) : size; | ^~~~~ | __ffs In file included from arch/sh/include/asm/bitops.h:69, from include/linux/bitops.h:50, from include/linux/kernel.h:11, from include/asm-generic/bug.h:20, from arch/sh/include/asm/bug.h:112, from include/linux/bug.h:5, from include/linux/page-flags.h:10, from kernel/bounds.c:10: include/asm-generic/bitops/__fls.h: At top level: include/asm-generic/bitops/__fls.h:13:38: error: conflicting types for '__fls' 13 | static __always_inline unsigned long __fls(unsigned long word) | ^~~~~ In file included from arch/sh/include/asm/bitops.h:61, from include/linux/bitops.h:50, from include/linux/kernel.h:11, from include/asm-generic/bug.h:20, from arch/sh/include/asm/bug.h:112, from include/linux/bug.h:5, from include/linux/page-flags.h:10, from kernel/bounds.c:10: include/asm-generic/bitops/find.h:164:16: note: previous implicit declaration of '__fls' was here 164 | return val ? __fls(val) : size; | ^~~~~ cc1: some warnings being treated as errors -- In file included from arch/sh/include/asm/bitops.h:61, from include/linux/bitops.h:50, from include/linux/kernel.h:11, from include/asm-generic/bug.h:20, from arch/sh/include/asm/bug.h:112, from include/linux/bug.h:5, from include/linux/page-flags.h:10, from kernel/bounds.c:10: include/asm-generic/bitops/find.h: In function 'find_last_bit': 164 | return val ? __fls(val) : size; | ^~~~~ | __ffs In file included from arch/sh/include/asm/bitops.h:69, from include/linux/bitops.h:50, from include/linux/kernel.h:11, from include/asm-generic/bug.h:20, from arch/sh/include/asm/bug.h:112, from include/linux/bug.h:5, from include/linux/page-flags.h:10, from kernel/bounds.c:10: include/asm-generic/bitops/__fls.h: At top level: include/asm-generic/bitops/__fls.h:13:38: error: conflicting types for '__fls' 13 | static __always_inline unsigned long __fls(unsigned long word) | ^~~~~ In file included from arch/sh/include/asm/bitops.h:61, from include/linux/bitops.h:50, from include/linux/kernel.h:11, from include/asm-generic/bug.h:20, from arch/sh/include/asm/bug.h:112, from include/linux/bug.h:5, from include/linux/page-flags.h:10, from kernel/bounds.c:10: include/asm-generic/bitops/find.h:164:16: note: previous implicit declaration of '__fls' was here 164 | return val ? __fls(val) : size; | ^~~~~ cc1: some warnings being treated as errors make[2]: *** [scripts/Makefile.build:117: kernel/bounds.s] Error 1 make[2]: Target '__build' not remade because of errors. make[1]: *** [Makefile:1220: prepare0] Error 2 make[1]: Target 'modules_prepare' not remade because of errors. make: *** [Makefile:185: __sub-make] Error 2 make: Target 'modules_prepare' not remade because of errors. -- WARNING: unmet direct dependencies detected for SND_ATMEL_SOC_PDC Depends on SOUND && !UML && SND && SND_SOC && SND_ATMEL_SOC && HAS_DMA Selected by - SND_ATMEL_SOC_SSC && SOUND && !UML && SND && SND_SOC && SND_ATMEL_SOC - SND_ATMEL_SOC_SSC_PDC && SOUND && !UML && SND && SND_SOC && SND_ATMEL_SOC && ATMEL_SSC In file included from arch/sh/include/asm/bitops.h:61, from include/linux/bitops.h:50, from include/linux/kernel.h:11, from include/asm-generic/bug.h:20, from arch/sh/include/asm/bug.h:112, from include/linux/bug.h:5, from include/linux/page-flags.h:10, from kernel/bounds.c:10: include/asm-generic/bitops/find.h: In function 'find_last_bit': 164 | return val __fls(val) : size; | ^~~~~ | __ffs In file included from arch/sh/include/asm/bitops.h:69, from include/linux/bitops.h:50, from include/linux/kernel.h:11, from include/asm-generic/bug.h:20, from arch/sh/include/asm/bug.h:112, from include/linux/bug.h:5, from include/linux/page-flags.h:10, from kernel/bounds.c:10: include/asm-generic/bitops/__fls.h: At top level: include/asm-generic/bitops/__fls.h:13:38: error: conflicting types for '__fls' 13 | static __always_inline unsigned long __fls(unsigned long word) | ^~~~~ In file included from arch/sh/include/asm/bitops.h:61, from include/linux/bitops.h:50, from include/linux/kernel.h:11, from include/asm-generic/bug.h:20, from arch/sh/include/asm/bug.h:112, from include/linux/bug.h:5, from include/linux/page-flags.h:10, from kernel/bounds.c:10: include/asm-generic/bitops/find.h:164:16: note: previous implicit declaration of '__fls' was here 164 | return val __fls(val) : size; | ^~~~~ cc1: some warnings being treated as errors Makefile System.map arch block certs crypto drivers fs include init ipc kernel lib mm modules.builtin modules.builtin.modinfo modules.order net samples scripts security sound source usr virt vmlinux vmlinux.o vmlinux.symvers [scripts/Makefile.build:117: kernel/bounds.s] Error 1 Target '__build' not remade because of errors. Makefile System.map arch block certs crypto drivers fs include init ipc kernel lib mm modules.builtin modules.builtin.modinfo modules.order net samples scripts security sound source usr virt vmlinux vmlinux.o vmlinux.symvers [Makefile:1220: prepare0] Error 2 Target 'prepare' not remade because of errors. make: Makefile System.map arch block certs crypto drivers fs include init ipc kernel lib mm modules.builtin modules.builtin.modinfo modules.order net samples scripts security sound source usr virt vmlinux vmlinux.o vmlinux.symvers [Makefile:185: __sub-make] Error 2 make: Target 'prepare' not remade because of errors. Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for SND_ATMEL_SOC_PDC Depends on SOUND && !UML && SND && SND_SOC && SND_ATMEL_SOC && HAS_DMA Selected by - SND_ATMEL_SOC_SSC && SOUND && !UML && SND && SND_SOC && SND_ATMEL_SOC - SND_ATMEL_SOC_SSC_PDC && SOUND && !UML && SND && SND_SOC && SND_ATMEL_SOC && ATMEL_SSC vim +/__fls +164 include/asm-generic/bitops/find.h 150 151 #ifndef find_last_bit 152 /** 153 * find_last_bit - find the last set bit in a memory region 154 * @addr: The address to start the search at 155 * @size: The number of bits to search 156 * 157 * Returns the bit number of the last set bit, or size. 158 */ 159 static __always_inline 160 unsigned long find_last_bit(const unsigned long *addr, unsigned long size) 161 { 162 if (small_const_nbits(size)) { 163 unsigned long val = *addr & BITMAP_LAST_WORD_MASK(size); 165 } 166 167 return _find_last_bit(addr, size); 168 } 169 #endif 170 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org