Re: [PATCH 9/9] gpio: shared: generalize most code to firmware nodes

[kernel test robot]

Hi Bartosz,

kernel test robot noticed the following build warnings:

[auto build test WARNING on 6628e7d4c6b25c8d18f1345e3a20d21829aae7e4]

url:    https://github.com/intel-lab-lkp/linux/commits/Bartosz-Golaszewski/device-property-fix-fwnode_name_eq-for-empty-node-names/20261104-150343
base:   6628e7d4c6b25c8d18f1345e3a20d21829aae7e4
patch link:    https://lore.kernel.org/r/20261104-fwnode-for-each-prop-v1-9-6e28fe1c72c4%40oss.qualcomm.com
patch subject: [PATCH 9/9] gpio: shared: generalize most code to firmware nodes
config: um-randconfig-1000-20261105 (https://download.01.org/0day-ci/archive/20261105/202611051423.Dk3ycCJc-lkp@xxxxxxxxx/config)
compiler: clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18)
rustc: rustc 1.96.0 (ac68faa20 2026-05-25)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261105/202611051423.Dk3ycCJc-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/202611051423.Dk3ycCJc-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

   In file included from drivers/gpio/gpiolib-shared.c:28:
   In file included from drivers/gpio/gpiolib.h:16:
   In file included from include/linux/gpio/driver.h:8:
   In file included from include/linux/irqchip/chained_irq.h:10:
   In file included from include/linux/irq.h:20:
   In file included from include/linux/io.h:12:
   In file included from arch/um/include/asm/io.h:24:
   include/asm-generic/io.h:1209:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
    1209 |         return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
         |                                                   ~~~~~~~~~~ ^
>> drivers/gpio/gpiolib-shared.c:300:12: warning: function 'gpio_shared_fwnode_traverse' is not needed and will not be emitted [-Wunneeded-internal-declaration]
     300 | static int gpio_shared_fwnode_traverse(struct fwnode_handle *curr)
         |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~
   2 warnings generated.


vim +/gpio_shared_fwnode_traverse +300 drivers/gpio/gpiolib-shared.c

   299	
 > 300	static int gpio_shared_fwnode_traverse(struct fwnode_handle *curr)
   301	{
   302		int ret;
   303	
   304		if (gpio_shared_fwnode_ignore(curr))
   305			return 0;
   306	
   307		ret = gpio_shared_fwnode_scan_properties(curr);
   308		if (ret)
   309			return ret;
   310	
   311		fwnode_for_each_child_node_scoped(curr, child) {
   312			ret = gpio_shared_fwnode_traverse(child);
   313			if (ret)
   314				return ret;
   315		}
   316	
   317		return 0;
   318	}
   319	

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