tree:   https://git.kernel.org/pub/scm/linux/kernel/git/dinguyen/linux.git socfpga-5.14_v1
head:   cc7ba8d9b34b85acfbeefb77fa57c116c733c2c4
commit: 0f594e3dee07f3a29f4f5f1ac7e71887cf2f0f57 [10/121] FogBugz #398879-2: fpga mgr debugfs
config: powerpc-allyesconfig (attached as .config)
compiler: powerpc-linux-gcc (GCC) 11.2.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://git.kernel.org/pub/scm/linux/kernel/git/dinguyen/linux.git/commit/?id=0f594e3dee07f3a29f4f5f1ac7e71887cf2f0f57
        git remote add dinguyen https://git.kernel.org/pub/scm/linux/kernel/git/dinguyen/linux.git
        git fetch --no-tags dinguyen socfpga-5.14_v1
        git checkout 0f594e3dee07f3a29f4f5f1ac7e71887cf2f0f57
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=powerpc 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> drivers/fpga/fpga-mgr-debugfs.c:171:6: warning: no previous prototype for 'fpga_mgr_debugfs_add' [-Wmissing-prototypes]
     171 | void fpga_mgr_debugfs_add(struct fpga_manager *mgr)
         |      ^~~~~~~~~~~~~~~~~~~~
>> drivers/fpga/fpga-mgr-debugfs.c:204:6: warning: no previous prototype for 'fpga_mgr_debugfs_remove' [-Wmissing-prototypes]
     204 | void fpga_mgr_debugfs_remove(struct fpga_manager *mgr)
         |      ^~~~~~~~~~~~~~~~~~~~~~~
>> drivers/fpga/fpga-mgr-debugfs.c:219:6: warning: no previous prototype for 'fpga_mgr_debugfs_init' [-Wmissing-prototypes]
     219 | void fpga_mgr_debugfs_init(void)
         |      ^~~~~~~~~~~~~~~~~~~~~
>> drivers/fpga/fpga-mgr-debugfs.c:226:6: warning: no previous prototype for 'fpga_mgr_debugfs_uninit' [-Wmissing-prototypes]
     226 | void fpga_mgr_debugfs_uninit(void)
         |      ^~~~~~~~~~~~~~~~~~~~~~~


vim +/fpga_mgr_debugfs_add +171 drivers/fpga/fpga-mgr-debugfs.c

   170	
 > 171	void fpga_mgr_debugfs_add(struct fpga_manager *mgr)
   172	{
   173		struct fpga_mgr_debugfs *debugfs;
   174		struct fpga_image_info *info;
   175	
   176		if (!fpga_mgr_debugfs_root)
   177			return;
   178	
   179		debugfs = kzalloc(sizeof(*debugfs), GFP_KERNEL);
   180		if (!debugfs)
   181			return;
   182	
   183		info = fpga_image_info_alloc(&mgr->dev);
   184		if (!info) {
   185			kfree(debugfs);
   186			return;
   187		}
   188		debugfs->info = info;
   189	
   190		debugfs->debugfs_dir = debugfs_create_dir(dev_name(&mgr->dev),
   191							  fpga_mgr_debugfs_root);
   192	
   193		debugfs_create_file("firmware_name", 0600, debugfs->debugfs_dir, mgr,
   194				    &fpga_mgr_firmware_fops);
   195	
   196		debugfs_create_file("image", 0200, debugfs->debugfs_dir, mgr,
   197				    &fpga_mgr_image_fops);
   198	
   199		debugfs_create_u32("flags", 0600, debugfs->debugfs_dir, &info->flags);
   200	
   201		mgr->debugfs = debugfs;
   202	}
   203	
 > 204	void fpga_mgr_debugfs_remove(struct fpga_manager *mgr)
   205	{
   206		struct fpga_mgr_debugfs *debugfs = mgr->debugfs;
   207	
   208		if (!fpga_mgr_debugfs_root)
   209			return;
   210	
   211		debugfs_remove_recursive(debugfs->debugfs_dir);
   212	
   213		/* this function also frees debugfs->info->firmware_name */
   214		fpga_image_info_free(debugfs->info);
   215	
   216		kfree(debugfs);
   217	}
   218	
 > 219	void fpga_mgr_debugfs_init(void)
   220	{
   221		fpga_mgr_debugfs_root = debugfs_create_dir("fpga_manager", NULL);
   222		if (!fpga_mgr_debugfs_root)
   223			pr_warn("fpga_mgr: Failed to create debugfs root\n");
   224	}
   225	
 > 226	void fpga_mgr_debugfs_uninit(void)
   227	{
   228		debugfs_remove_recursive(fpga_mgr_debugfs_root);
   229	}
   230	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org