Hi Lorenzo, kernel test robot noticed the following build errors: [auto build test ERROR on robh/for-next] [also build test ERROR on linus/master thierry-reding-pwm/for-next v6.11-rc2 next-20240809] [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#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Lorenzo-Bianconi/dt-bindings-pwm-Document-Airoha-EN7581-PWM/20240810-143716 base: https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next patch link: https://lore.kernel.org/r/a03f5ea9291e39eab303696eb03fdd44cf04e8d9.1723264979.git.lorenzo%40kernel.org patch subject: [PATCH 2/2] pwm: airoha: Add support for EN7581 SoC config: hexagon-allmodconfig (https://download.01.org/0day-ci/archive/20240811/202408110920.KEW33sRE-lkp@xxxxxxxxx/config) compiler: clang version 20.0.0git (https://github.com/llvm/llvm-project f86594788ce93b696675c94f54016d27a6c21d18) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240811/202408110920.KEW33sRE-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202408110920.KEW33sRE-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): In file included from drivers/pwm/pwm-airoha.c:7: In file included from include/linux/io.h:14: In file included from arch/hexagon/include/asm/io.h:328: include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 548 | val = __raw_readb(PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 561 | val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr)); | ~~~~~~~~~~ ^ include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu' 37 | #define __le16_to_cpu(x) ((__force __u16)(__le16)(x)) | ^ In file included from drivers/pwm/pwm-airoha.c:7: In file included from include/linux/io.h:14: In file included from arch/hexagon/include/asm/io.h:328: include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 574 | val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr)); | ~~~~~~~~~~ ^ include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu' 35 | #define __le32_to_cpu(x) ((__force __u32)(__le32)(x)) | ^ In file included from drivers/pwm/pwm-airoha.c:7: In file included from include/linux/io.h:14: In file included from arch/hexagon/include/asm/io.h:328: include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 585 | __raw_writeb(value, PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 595 | __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 605 | __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr); | ~~~~~~~~~~ ^ >> drivers/pwm/pwm-airoha.c:239:19: error: call to undeclared function '__bf_shf'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 239 | val = (period << __bf_shf(mask)) & mask; | ^ drivers/pwm/pwm-airoha.c:271:24: error: call to undeclared function '__bf_shf'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 271 | val = ((index & 7) << __bf_shf(mask)) & mask; | ^ 6 warnings and 2 errors generated. vim +/__bf_shf +239 drivers/pwm/pwm-airoha.c 231 232 static void airoha_pwm_config_waveform(struct airoha_pwm *pc, int index, 233 u32 duty, u32 period) 234 { 235 u32 mask, val; 236 237 /* Configure frequency divisor */ 238 mask = WAVE_GEN_CYCLE_MASK(index % 4); > 239 val = (period << __bf_shf(mask)) & mask; 240 airoha_pwm_cycle_rmw(pc, REG_CYCLE_CFG_VALUE(index / 4), mask, val); 241 242 /* Configure duty cycle */ 243 duty = ((DUTY_FULL - duty) << 8) | duty; 244 mask = GPIO_FLASH_PRD_MASK(index % 2); 245 val = (duty << __bf_shf(mask)) & mask; 246 airoha_pwm_flash_rmw(pc, REG_GPIO_FLASH_PRD_SET(index / 2), mask, val); 247 } 248 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
