linux-kernel - drivers/spi/spi-pic32-sqi.c:749:34: warning: 'pic32_sqi_of

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Message-ID: <202311051543.C4ewiBWU-lkp@intel.com>
Date:   Sun, 5 Nov 2023 15:29:23 +0800
From:   kernel test robot <lkp@...el.com>
To:     Purna Chandra Mandal <purna.mandal@...rochip.com>
Cc:     oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Mark Brown <broonie@...nel.org>
Subject: drivers/spi/spi-pic32-sqi.c:749:34: warning: 'pic32_sqi_of_ids'
 defined but not used

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   aea6bf908d730b01bd264a8821159db9463c111c
commit: 3270ac230f660843a7f7d631746ee2c8ee63f347 spi: pic32-sqi: add SPI driver for PIC32 SQI controller.
date:   8 years ago
config: x86_64-buildonly-randconfig-001-20231101 (https://download.01.org/0day-ci/archive/20231105/202311051543.C4ewiBWU-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231105/202311051543.C4ewiBWU-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202311051543.C4ewiBWU-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from include/linux/kobject.h:21,
                    from include/linux/device.h:17,
                    from include/linux/dma-mapping.h:6,
                    from drivers/spi/spi-pic32-sqi.c:18:
   include/linux/sysfs.h: In function 'sysfs_get_dirent':
   include/linux/sysfs.h:517:44: warning: pointer targets in passing argument 2 of 'kernfs_find_and_get' differ in signedness [-Wpointer-sign]
     517 |         return kernfs_find_and_get(parent, name);
         |                                            ^~~~
         |                                            |
         |                                            const unsigned char *
   In file included from include/linux/sysfs.h:15:
   include/linux/kernfs.h:437:57: note: expected 'const char *' but argument is of type 'const unsigned char *'
     437 | kernfs_find_and_get(struct kernfs_node *kn, const char *name)
         |                                             ~~~~~~~~~~~~^~~~
   drivers/spi/spi-pic32-sqi.c: At top level:
>> drivers/spi/spi-pic32-sqi.c:749:34: warning: 'pic32_sqi_of_ids' defined but not used [-Wunused-const-variable=]
     749 | static const struct of_device_id pic32_sqi_of_ids[] = {
         |                                  ^~~~~~~~~~~~~~~~

vim +/pic32_sqi_of_ids +749 drivers/spi/spi-pic32-sqi.c

   748	
 > 749	static const struct of_device_id pic32_sqi_of_ids[] = {
   750		{.compatible = "microchip,pic32mzda-sqi",},
   751		{},
   752	};
   753	MODULE_DEVICE_TABLE(of, pic32_sqi_of_ids);
   754	

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https://github.com/intel/lkp-tests/wiki