Hi Per-Daniel, kernel test robot noticed the following build warnings: [auto build test WARNING on 0c559323bbaabee7346c12e74b497e283aaafef5] url: https://github.com/intel-lab-lkp/linux/commits/Per-Daniel-Olsson/dt-bindings-iio-light-Document-TI-OPT4060-RGBW-sensor/20241006-005244 base: 0c559323bbaabee7346c12e74b497e283aaafef5 patch link: https://lore.kernel.org/r/20241005165119.3549472-3-perdaniel.olsson%40axis.com patch subject: [PATCH v2 2/2] iio: light: Add support for TI OPT4060 color sensor config: um-allmodconfig (https://download.01.org/0day-ci/archive/20241007/202410071407.8Vp5xp85-lkp@xxxxxxxxx/config) compiler: clang version 20.0.0git (https://github.com/llvm/llvm-project fef3566a25ff0e34fb87339ba5e13eca17cec00f) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241007/202410071407.8Vp5xp85-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/202410071407.8Vp5xp85-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): In file included from drivers/iio/light/opt4060.c:11: In file included from include/linux/i2c.h:19: In file included from include/linux/regulator/consumer.h:35: In file included from include/linux/suspend.h:5: In file included from include/linux/swap.h:9: In file included from include/linux/memcontrol.h:13: In file included from include/linux/cgroup.h:26: In file included from include/linux/kernel_stat.h:8: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:11: In file included from arch/um/include/asm/hardirq.h:5: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:14: In file included from arch/um/include/asm/io.h:24: 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/iio/light/opt4060.c:11: In file included from include/linux/i2c.h:19: In file included from include/linux/regulator/consumer.h:35: In file included from include/linux/suspend.h:5: In file included from include/linux/swap.h:9: In file included from include/linux/memcontrol.h:13: In file included from include/linux/cgroup.h:26: In file included from include/linux/kernel_stat.h:8: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:11: In file included from arch/um/include/asm/hardirq.h:5: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:14: In file included from arch/um/include/asm/io.h:24: 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/iio/light/opt4060.c:11: In file included from include/linux/i2c.h:19: In file included from include/linux/regulator/consumer.h:35: In file included from include/linux/suspend.h:5: In file included from include/linux/swap.h:9: In file included from include/linux/memcontrol.h:13: In file included from include/linux/cgroup.h:26: In file included from include/linux/kernel_stat.h:8: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:11: In file included from arch/um/include/asm/hardirq.h:5: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:14: In file included from arch/um/include/asm/io.h:24: 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); | ~~~~~~~~~~ ^ include/asm-generic/io.h:693:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 693 | readsb(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:701:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 701 | readsw(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:709:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 709 | readsl(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:718:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 718 | writesb(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:727:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 727 | writesw(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:736:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 736 | writesl(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ In file included from drivers/iio/light/opt4060.c:11: In file included from include/linux/i2c.h:19: In file included from include/linux/regulator/consumer.h:35: In file included from include/linux/suspend.h:5: In file included from include/linux/swap.h:9: In file included from include/linux/memcontrol.h:21: In file included from include/linux/mm.h:2213: include/linux/vmstat.h:518:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion] 518 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_" | ~~~~~~~~~~~ ^ ~~~ >> drivers/iio/light/opt4060.c:1026:8: warning: variable 'chan' is uninitialized when used here [-Wuninitialized] 1026 | chan, | ^~~~ include/linux/iio/events.h:54:51: note: expanded from macro 'IIO_UNMOD_EVENT_CODE' 54 | IIO_EVENT_CODE(chan_type, 0, 0, direction, type, number, 0, 0) | ^~~~~~ include/linux/iio/events.h:29:9: note: expanded from macro 'IIO_EVENT_CODE' 29 | ((u16)chan)) | ^~~~ drivers/iio/light/opt4060.c:994:15: note: initialize the variable 'chan' to silence this warning 994 | int ret, chan, dummy; | ^ | = 0 14 warnings generated. Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for MODVERSIONS Depends on [n]: MODULES [=y] && !COMPILE_TEST [=y] Selected by [y]: - RANDSTRUCT_FULL [=y] && (CC_HAS_RANDSTRUCT [=y] || GCC_PLUGINS [=n]) && MODULES [=y] WARNING: unmet direct dependencies detected for GET_FREE_REGION Depends on [n]: SPARSEMEM [=n] Selected by [m]: - RESOURCE_KUNIT_TEST [=m] && RUNTIME_TESTING_MENU [=y] && KUNIT [=m] vim +/chan +1026 drivers/iio/light/opt4060.c 989 990 static irqreturn_t opt4060_irq_thread(int irq, void *private) 991 { 992 struct iio_dev *idev = private; 993 struct opt4060_chip *chip = iio_priv(idev); 994 int ret, chan, dummy; 995 unsigned int int_res; 996 997 ret = regmap_read(chip->regmap, OPT4060_RES_CTRL, &int_res); 998 if (ret < 0) { 999 dev_err(chip->dev, "Failed to read interrupt reasons.\n"); 1000 return IRQ_NONE; 1001 } 1002 1003 if (!chip->data_trigger_active) { 1004 /* Only trigger interrupts on thresholds */ 1005 ret = opt4060_set_int_state(chip, OPT4060_INT_CTRL_THRESHOLD); 1006 if (ret) { 1007 dev_err(chip->dev, "Failed to set interrupt state\n"); 1008 return IRQ_NONE; 1009 } 1010 } 1011 1012 /* Read OPT4060_CTRL to clear interrupt */ 1013 ret = regmap_read(chip->regmap, OPT4060_CTRL, &dummy); 1014 if (ret < 0) { 1015 dev_err(chip->dev, "Failed to clear interrupt\n"); 1016 return IRQ_NONE; 1017 } 1018 1019 /* Handle events */ 1020 if (int_res & (OPT4060_RES_CTRL_FLAG_H | OPT4060_RES_CTRL_FLAG_L)) { 1021 u64 code; 1022 1023 /* Check if the interrupt is from the lower threshold */ 1024 if (int_res & OPT4060_RES_CTRL_FLAG_L) { 1025 code = IIO_UNMOD_EVENT_CODE(IIO_LIGHT, > 1026 chan, 1027 IIO_EV_TYPE_THRESH, 1028 IIO_EV_DIR_FALLING); 1029 iio_push_event(idev, code, 1030 iio_get_time_ns(idev)); 1031 } 1032 /* Check if the interrupt is from the upper threshold */ 1033 if (int_res & OPT4060_RES_CTRL_FLAG_H) { 1034 code = IIO_UNMOD_EVENT_CODE(IIO_LIGHT, 1035 chan, 1036 IIO_EV_TYPE_THRESH, 1037 IIO_EV_DIR_RISING); 1038 iio_push_event(idev, code, 1039 iio_get_time_ns(idev)); 1040 } 1041 /* Handle threshold triggers */ 1042 if (chip->threshold_trigger_active && iio_buffer_enabled(idev)) 1043 iio_trigger_poll_nested(chip->threshold_trig); 1044 } 1045 1046 /* Handle conversion ready */ 1047 if (int_res & OPT4060_RES_CTRL_CONV_READY) { 1048 /* Signal completion for potentially waiting reads */ 1049 complete(&chip->completion); 1050 1051 /* Handle data ready triggers */ 1052 if (chip->data_trigger_active && iio_buffer_enabled(idev)) 1053 iio_trigger_poll_nested(chip->data_trig); 1054 } 1055 return IRQ_HANDLED; 1056 } 1057 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
