Re: [PATCH v1 2/2] devres: Move devm_alloc_percpu() and related to devres.h

[kernel test robot]

Hi Andy,

kernel test robot noticed the following build errors:

[auto build test ERROR on driver-core/driver-core-testing]
[also build test ERROR on driver-core/driver-core-next driver-core/driver-core-linus linus/master v6.18-rc5 next-20251111]
[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/Andy-Shevchenko/devres-Remove-unused-devm_free_percpu/20251111-230827
base:   driver-core/driver-core-testing
patch link:    https://lore.kernel.org/r/20251111144104.910241-3-andriy.shevchenko%40linux.intel.com
patch subject: [PATCH v1 2/2] devres: Move devm_alloc_percpu() and related to devres.h
config: loongarch-allnoconfig (https://download.01.org/0day-ci/archive/20251112/202511120059.G3PR823H-lkp@xxxxxxxxx/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 996639d6ebb86ff15a8c99b67f1c2e2117636ae7)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251112/202511120059.G3PR823H-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/202511120059.G3PR823H-lkp@xxxxxxxxx/

All errors (new ones prefixed by >>):

   In file included from drivers/gpio/gpiolib-devres.c:9:
>> include/linux/device/devres.h:113:6: error: variable has incomplete type 'void'
     113 | void __percpu *__devm_alloc_percpu(struct device *dev, size_t size, size_t align);
         |      ^
   include/linux/compiler_types.h:60:19: note: expanded from macro '__percpu'
      60 | # define __percpu       __percpu_qual BTF_TYPE_TAG(percpu)
         |                         ^
   In file included from drivers/gpio/gpiolib-devres.c:9:
>> include/linux/device/devres.h:113:15: error: expected ';' after top level declarator
     113 | void __percpu *__devm_alloc_percpu(struct device *dev, size_t size, size_t align);
         |               ^
   In file included from drivers/gpio/gpiolib-devres.c:17:
   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:20:
   In file included from include/linux/elf.h:6:
   In file included from arch/loongarch/include/asm/elf.h:9:
   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] |
         |                         ^        ~
   include/uapi/asm-generic/signal.h:62:2: note: array 'sig' declared here
      62 |         unsigned long sig[_NSIG_WORDS];
         |         ^
   In file included from drivers/gpio/gpiolib-devres.c:17:
   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:20:
   In file included from include/linux/elf.h:6:
   In file included from arch/loongarch/include/asm/elf.h:9:
   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] |
         |                                       ^        ~
   include/uapi/asm-generic/signal.h:62:2: note: array 'sig' declared here
      62 |         unsigned long sig[_NSIG_WORDS];
         |         ^
   In file included from drivers/gpio/gpiolib-devres.c:17:
   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:20:
   In file included from include/linux/elf.h:6:
   In file included from arch/loongarch/include/asm/elf.h:9:
   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;
         |                         ^        ~
   include/uapi/asm-generic/signal.h:62:2: note: array 'sig' declared here
      62 |         unsigned long sig[_NSIG_WORDS];
         |         ^
   In file included from drivers/gpio/gpiolib-devres.c:17:
   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:20:
   In file included from include/linux/elf.h:6:
   In file included from arch/loongarch/include/asm/elf.h:9:
   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;
         |                         ^        ~
   include/uapi/asm-generic/signal.h:62:2: note: array 'sig' declared here
      62 |         unsigned long sig[_NSIG_WORDS];
         |         ^
   In file included from drivers/gpio/gpiolib-devres.c:17:
   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:20:
   In file included from include/linux/elf.h:6:
   In file included from arch/loongarch/include/asm/elf.h:9:
   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]) &&
         |                          ^         ~
   include/uapi/asm-generic/signal.h:62:2: note: array 'sig' declared here
      62 |         unsigned long sig[_NSIG_WORDS];
         |         ^
   In file included from drivers/gpio/gpiolib-devres.c:17:
   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:20:
   In file included from include/linux/elf.h:6:
   In file included from arch/loongarch/include/asm/elf.h:9:


vim +/void +113 include/linux/device/devres.h

    98	
    99	/**
   100	 * devm_alloc_percpu - Resource-managed alloc_percpu
   101	 * @dev: Device to allocate per-cpu memory for
   102	 * @type: Type to allocate per-cpu memory for
   103	 *
   104	 * Managed alloc_percpu. Per-cpu memory allocated with this function is
   105	 * automatically freed on driver detach.
   106	 *
   107	 * RETURNS:
   108	 * Pointer to allocated memory on success, NULL on failure.
   109	 */
   110	#define devm_alloc_percpu(dev, type)      \
   111		((typeof(type) __percpu *)__devm_alloc_percpu((dev), sizeof(type), __alignof__(type)))
   112	
 > 113	void __percpu *__devm_alloc_percpu(struct device *dev, size_t size, size_t align);
   114	

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