Hi Steve, FYI, the error/warning still remains. tree: https://github.com/tobetter/linux odroid-6.6.y head: 506d08468b830f4f71052cf0f23e9f1053f9c9b6 commit: 905d94c26ec85e35bcc9d727a5c49130603afbb9 [42/88] ODROID-M1: Add /dev/gpiomem device config: arm-randconfig-002-20241014 (https://download.01.org/0day-ci/archive/20241014/202410141608.rULXgNM1-lkp@xxxxxxxxx/config) compiler: arm-linux-gnueabi-gcc (GCC) 14.1.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241014/202410141608.rULXgNM1-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/202410141608.rULXgNM1-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> drivers/char/rk3568-gpiomem.c:2: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst * GPIO memory device driver vim +2 drivers/char/rk3568-gpiomem.c > 2 * GPIO memory device driver 3 * 4 * Creates a chardev /dev/gpiomem which will provide user access to 5 * the rk3568's GPIO registers when it is mmap()'d. 6 * No longer need root for user GPIO access, but without relaxing permissions 7 * on /dev/mem. 8 * 9 * Written by Luke Wren <luke@xxxxxxxxxxxxxxx> 10 * Copyright (c) 2015, Raspberry Pi (Trading) Ltd. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions, and the following disclaimer, 17 * without modification. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. The names of the above-listed copyright holders may not be used 22 * to endorse or promote products derived from this software without 23 * specific prior written permission. 24 * 25 * ALTERNATIVELY, this software may be distributed under the terms of the 26 * GNU General Public License ("GPL") version 2, as published by the Free 27 * Software Foundation. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS 30 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 31 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 32 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 33 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 34 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 35 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 36 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 37 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 38 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 39 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 40 */ 41 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki