[thomas-weissschuh:b4/b4-sysfs-const-attr-prep-easy 57/57] drivers/pci/hotplug/pci_hotplug_core.c:255:63: warning: variable 'slot' is uninitialized when used here

[thomas-weissschuh:b4/b4-sysfs-const-attr-prep-easy 57/57] drivers/pci/hotplug/pci_hotplug_core.c:255:63: warning: variable 'slot' is uninitialized when used here

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/thomas.weissschuh/linux.git b4/b4-sysfs-const-attr-prep-easy
head:   67a3c6abb9033d2ce2a9ac12d4cfb9530148b38f
commit: 67a3c6abb9033d2ce2a9ac12d4cfb9530148b38f [57/57] hotplug
config: s390-allmodconfig (https://download.01.org/0day-ci/archive/20260624/202606241242.MfC5ItwK-lkp@intel.com/config)
compiler: clang version 23.0.0git (https://github.com/llvm/llvm-project a9b492db3d50683e446cd1a5c9ffaf4e92cb77a7)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260624/202606241242.MfC5ItwK-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/202606241242.MfC5ItwK-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/pci/hotplug/pci_hotplug_core.c:255:63: warning: variable 'slot' is uninitialized when used here [-Wuninitialized]
     255 |         if (attr == &hotplug_slot_attr_power.attr && !has_power_file(slot))
         |                                                                      ^~~~
   drivers/pci/hotplug/pci_hotplug_core.c:253:27: note: initialize the variable 'slot' to silence this warning
     253 |         struct hotplug_slot *slot;
         |                                  ^
         |                                   = NULL
   1 warning generated.


vim +/slot +255 drivers/pci/hotplug/pci_hotplug_core.c

   250	
   251	static umode_t hotplug_slot_attr_is_visible(struct kobject *kobj, const struct attribute *attr, int idx)
   252	{
   253		struct hotplug_slot *slot;
   254	
 > 255		if (attr == &hotplug_slot_attr_power.attr && !has_power_file(slot))
   256			return 0;
   257	
   258		if (attr == &hotplug_slot_attr_attention.attr && !has_attention_file(slot))
   259			return 0;
   260	
   261		if (attr == &hotplug_slot_attr_latch.attr && !has_latch_file(slot))
   262			return 0;
   263	
   264		if (attr == &hotplug_slot_attr_presence.attr && !has_adapter_file(slot))
   265			return 0;
   266	
   267		if (attr == &hotplug_slot_attr_test.attr && !has_test_file(slot))
   268			return 0;
   269	
   270		return attr->mode;
   271	}
   272	

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