Re: [PATCH v18 01/10] power: reset: reboot-mode: Remove devres based allocations

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

Hi Shivendra,

kernel test robot noticed the following build errors:

[auto build test ERROR on cc3aa43b44bdb43dfbac0fcb51c56594a11338a8]

url:    https://github.com/intel-lab-lkp/linux/commits/Shivendra-Pratap/power-reset-reboot-mode-Remove-devres-based-allocations/20251224-011508
base:   cc3aa43b44bdb43dfbac0fcb51c56594a11338a8
patch link:    https://lore.kernel.org/r/20251223-arm-psci-system_reset2-vendor-reboots-v18-1-32fa9e76efc3%40oss.qualcomm.com
patch subject: [PATCH v18 01/10] power: reset: reboot-mode: Remove devres based allocations
config: powerpc64-randconfig-r072-20251225 (https://download.01.org/0day-ci/archive/20251225/202512251820.e0ZKwuCc-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 4ef602d446057dabf5f61fb221669ecbeda49279)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251225/202512251820.e0ZKwuCc-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/202512251820.e0ZKwuCc-lkp@intel.com/

All errors (new ones prefixed by >>):

>> drivers/power/reset/reboot-mode.c:94:10: error: call to undeclared function 'kzalloc'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
      94 |                 info = kzalloc(sizeof(*info), GFP_KERNEL);
         |                        ^
>> drivers/power/reset/reboot-mode.c:94:8: error: incompatible integer to pointer conversion assigning to 'struct mode_info *' from 'int' [-Wint-conversion]
      94 |                 info = kzalloc(sizeof(*info), GFP_KERNEL);
         |                      ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/power/reset/reboot-mode.c:120:2: error: call to undeclared function 'kfree'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     120 |         kfree(info);
         |         ^
   drivers/power/reset/reboot-mode.c:145:3: error: call to undeclared function 'kfree'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     145 |                 kfree(info);
         |                 ^
   4 errors generated.


vim +/kzalloc +94 drivers/power/reset/reboot-mode.c

    66	
    67	/**
    68	 * reboot_mode_register - register a reboot mode driver
    69	 * @reboot: reboot mode driver
    70	 *
    71	 * Returns: 0 on success or a negative error code on failure.
    72	 */
    73	int reboot_mode_register(struct reboot_mode_driver *reboot)
    74	{
    75		struct mode_info *info;
    76		struct mode_info *next;
    77		struct property *prop;
    78		struct device_node *np = reboot->dev->of_node;
    79		size_t len = strlen(PREFIX);
    80		u32 magic;
    81		int ret;
    82	
    83		INIT_LIST_HEAD(&reboot->head);
    84	
    85		for_each_property_of_node(np, prop) {
    86			if (strncmp(prop->name, PREFIX, len))
    87				continue;
    88	
    89			if (of_property_read_u32(np, prop->name, &magic)) {
    90				pr_err("reboot mode %s without magic number\n", prop->name);
    91				continue;
    92			}
    93	
  > 94			info = kzalloc(sizeof(*info), GFP_KERNEL);
    95			if (!info) {
    96				ret = -ENOMEM;
    97				goto error;
    98			}
    99	
   100			info->mode = kstrdup_const(prop->name + len, GFP_KERNEL);
   101			if (!info->mode) {
   102				ret =  -ENOMEM;
   103				goto error;
   104			} else if (info->mode[0] == '\0') {
   105				kfree_const(info->mode);
   106				ret = -EINVAL;
   107				pr_err("invalid mode name(%s): too short!\n", prop->name);
   108				goto error;
   109			}
   110	
   111			list_add_tail(&info->list, &reboot->head);
   112		}
   113	
   114		reboot->reboot_notifier.notifier_call = reboot_mode_notify;
   115		register_reboot_notifier(&reboot->reboot_notifier);
   116	
   117		return 0;
   118	
   119	error:
 > 120		kfree(info);
   121		list_for_each_entry_safe(info, next, &reboot->head, list) {
   122			list_del(&info->list);
   123			kfree_const(info->mode);
   124			kfree(info);
   125		}
   126	
   127		return ret;
   128	}
   129	EXPORT_SYMBOL_GPL(reboot_mode_register);
   130	

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