Re: [PATCH v5 01/12] gpiolib: add support to register sparse pin range

[kernel test robot <lkp@intel.com>]

Hi Thomas,

kernel test robot noticed the following build errors:

[auto build test ERROR on 8a834b0ac9ceb354a6e0b8cf5b363edca8221bdd]

url:    https://github.com/intel-lab-lkp/linux/commits/Thomas-Richard/gpiolib-add-support-to-register-sparse-pin-range/20250506-232604
base:   8a834b0ac9ceb354a6e0b8cf5b363edca8221bdd
patch link:    https://lore.kernel.org/r/20250506-aaeon-up-board-pinctrl-support-v5-1-3906529757d2%40bootlin.com
patch subject: [PATCH v5 01/12] gpiolib: add support to register sparse pin range
config: x86_64-kexec (https://download.01.org/0day-ci/archive/20250508/202505080122.v2Lm1rIa-lkp@intel.com/config)
compiler: clang version 20.1.2 (https://github.com/llvm/llvm-project 58df0ef89dd64126512e4ee27b4ac3fd8ddf6247)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250508/202505080122.v2Lm1rIa-lkp@intel.com/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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202505080122.v2Lm1rIa-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from drivers/gpio/gpiolib.c:32:
>> include/linux/gpio/driver.h:836:10: error: expected ';' after return statement
     836 |         return 0
         |                 ^
         |                 ;
   1 error generated.
--
   In file included from drivers/gpio/gpiolib-cdev.c:15:
>> include/linux/gpio/driver.h:836:10: error: expected ';' after return statement
     836 |         return 0
         |                 ^
         |                 ;
   drivers/gpio/gpiolib-cdev.c:1665:2: warning: implicit conversion from 'unsigned long' to 'unsigned int' changes value from 18446744073709551615 to 4294967295 [-Wconstant-conversion]
    1665 |         INIT_KFIFO(lr->events);
         |         ^~~~~~~~~~~~~~~~~~~~~~
   include/linux/kfifo.h:135:69: note: expanded from macro 'INIT_KFIFO'
     135 |         __kfifo->mask = __is_kfifo_ptr(__tmp) ? 0 : ARRAY_SIZE(__tmp->buf) - 1;\
         |                       ~                             ~~~~~~~~~~~~~~~~~~~~~~~^~~
   1 warning and 1 error generated.
--
   In file included from drivers/gpio/gpiolib-swnode.c:20:
>> include/linux/gpio/driver.h:836:10: error: expected ';' after return statement
     836 |         return 0
         |                 ^
         |                 ;
   In file included from drivers/gpio/gpiolib-swnode.c:22:
   In file included from drivers/gpio/gpiolib.h:12:
   In file included from include/linux/cdev.h:8:
   In file included from include/linux/device.h:32:
   In file included from include/linux/device/driver.h:21:
   In file included from include/linux/module.h:19:
   In file included from include/linux/elf.h:6:
   In file included from arch/x86/include/asm/elf.h:10:
   In file included from arch/x86/include/asm/ia32.h:7:
   In file included from include/linux/compat.h:17:
   In file included from include/linux/fs.h:34:
   In file included from include/linux/percpu-rwsem.h:7:
   In file included from include/linux/rcuwait.h:6:
   In file included from include/linux/sched/signal.h:6:
   include/linux/signal.h:98:11: warning: array index 3 is past the end of the array (that has type 'unsigned long[1]') [-Warray-bounds]
      98 |                 return (set->sig[3] | set->sig[2] |
         |                         ^        ~
   arch/x86/include/asm/signal.h:24:2: note: array 'sig' declared here
      24 |         unsigned long sig[_NSIG_WORDS];
         |         ^
   In file included from drivers/gpio/gpiolib-swnode.c:22:
   In file included from drivers/gpio/gpiolib.h:12:
   In file included from include/linux/cdev.h:8:
   In file included from include/linux/device.h:32:
   In file included from include/linux/device/driver.h:21:
   In file included from include/linux/module.h:19:
   In file included from include/linux/elf.h:6:
   In file included from arch/x86/include/asm/elf.h:10:
   In file included from arch/x86/include/asm/ia32.h:7:
   In file included from include/linux/compat.h:17:
   In file included from include/linux/fs.h:34:
   In file included from include/linux/percpu-rwsem.h:7:
   In file included from include/linux/rcuwait.h:6:
   In file included from include/linux/sched/signal.h:6:
   include/linux/signal.h:98:25: warning: array index 2 is past the end of the array (that has type 'unsigned long[1]') [-Warray-bounds]
      98 |                 return (set->sig[3] | set->sig[2] |
         |                                       ^        ~
   arch/x86/include/asm/signal.h:24:2: note: array 'sig' declared here
      24 |         unsigned long sig[_NSIG_WORDS];
         |         ^
   In file included from drivers/gpio/gpiolib-swnode.c:22:
   In file included from drivers/gpio/gpiolib.h:12:
   In file included from include/linux/cdev.h:8:
   In file included from include/linux/device.h:32:
   In file included from include/linux/device/driver.h:21:
   In file included from include/linux/module.h:19:
   In file included from include/linux/elf.h:6:
   In file included from arch/x86/include/asm/elf.h:10:
   In file included from arch/x86/include/asm/ia32.h:7:
   In file included from include/linux/compat.h:17:
   In file included from include/linux/fs.h:34:
   In file included from include/linux/percpu-rwsem.h:7:
   In file included from include/linux/rcuwait.h:6:
   In file included from include/linux/sched/signal.h:6:
   include/linux/signal.h:99:4: warning: array index 1 is past the end of the array (that has type 'unsigned long[1]') [-Warray-bounds]
      99 |                         set->sig[1] | set->sig[0]) == 0;
         |                         ^        ~
   arch/x86/include/asm/signal.h:24:2: note: array 'sig' declared here
      24 |         unsigned long sig[_NSIG_WORDS];
         |         ^
   In file included from drivers/gpio/gpiolib-swnode.c:22:
   In file included from drivers/gpio/gpiolib.h:12:
   In file included from include/linux/cdev.h:8:
   In file included from include/linux/device.h:32:
   In file included from include/linux/device/driver.h:21:
   In file included from include/linux/module.h:19:
   In file included from include/linux/elf.h:6:
   In file included from arch/x86/include/asm/elf.h:10:
   In file included from arch/x86/include/asm/ia32.h:7:
   In file included from include/linux/compat.h:17:
   In file included from include/linux/fs.h:34:
   In file included from include/linux/percpu-rwsem.h:7:
   In file included from include/linux/rcuwait.h:6:
   In file included from include/linux/sched/signal.h:6:
   include/linux/signal.h:101:11: warning: array index 1 is past the end of the array (that has type 'unsigned long[1]') [-Warray-bounds]
     101 |                 return (set->sig[1] | set->sig[0]) == 0;
         |                         ^        ~
   arch/x86/include/asm/signal.h:24:2: note: array 'sig' declared here
      24 |         unsigned long sig[_NSIG_WORDS];
         |         ^
   In file included from drivers/gpio/gpiolib-swnode.c:22:
   In file included from drivers/gpio/gpiolib.h:12:
   In file included from include/linux/cdev.h:8:
   In file included from include/linux/device.h:32:
   In file included from include/linux/device/driver.h:21:
   In file included from include/linux/module.h:19:
   In file included from include/linux/elf.h:6:
   In file included from arch/x86/include/asm/elf.h:10:
   In file included from arch/x86/include/asm/ia32.h:7:
   In file included from include/linux/compat.h:17:
   In file included from include/linux/fs.h:34:
   In file included from include/linux/percpu-rwsem.h:7:
   In file included from include/linux/rcuwait.h:6:
   In file included from include/linux/sched/signal.h:6:
   include/linux/signal.h:114:11: warning: array index 3 is past the end of the array (that has type 'const unsigned long[1]') [-Warray-bounds]
     114 |                 return  (set1->sig[3] == set2->sig[3]) &&
         |                          ^         ~


vim +836 include/linux/gpio/driver.h

   830	
   831	static inline int
   832	gpiochip_add_pin_range(struct gpio_chip *gc, const char *pinctl_name,
   833			       unsigned int gpio_offset, unsigned int pin_offset,
   834			       unsigned int npins)
   835	{
 > 836		return 0
   837	}
   838	

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