Hi Long, FYI, the error/warning still remains. tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: dc90c923fed4944f134644261022885c12631518 commit: 63101913bbd057cea31fb598eeb4a4c91584f0f0 [2687/2687] dax: kabi: Reserve KABI slots for dax_* struct config: x86_64-buildonly-randconfig-2001-20250818 (https://download.01.org/0day-ci/archive/20250818/202508182052.TJO1Yi0k-lkp@i...) compiler: gcc-12 (Debian 12.2.0-14+deb12u1) 12.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250818/202508182052.TJO1Yi0k-lkp@i...) 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/202508182052.TJO1Yi0k-lkp@intel.com/ All warnings (new ones prefixed by >>):

...

drivers/dax/super.c:45: warning: Function parameter or member 'KABI_RESERVE(1' not described in 'dax_device'

vim +45 drivers/dax/super.c 7b6be8444e0f0d Dan Williams 2017-04-11 17 1b7646014e0d83 Christoph Hellwig 2021-08-26 18 /** 1b7646014e0d83 Christoph Hellwig 2021-08-26 19 * struct dax_device - anchor object for dax services 1b7646014e0d83 Christoph Hellwig 2021-08-26 20 * @inode: core vfs 1b7646014e0d83 Christoph Hellwig 2021-08-26 21 * @cdev: optional character interface for "device dax" 1b7646014e0d83 Christoph Hellwig 2021-08-26 22 * @private: dax driver private data 1b7646014e0d83 Christoph Hellwig 2021-08-26 23 * @flags: state and boolean properties db8cd5efeebc49 Ira Weiny 2022-03-04 24 * @ops: operations for this device 8012b866085523 Shiyang Ruan 2022-06-03 25 * @holder_data: holder of a dax_device: could be filesystem or mapped device 8012b866085523 Shiyang Ruan 2022-06-03 26 * @holder_ops: operations for the inner holder 1b7646014e0d83 Christoph Hellwig 2021-08-26 27 */ 1b7646014e0d83 Christoph Hellwig 2021-08-26 28 struct dax_device { 1b7646014e0d83 Christoph Hellwig 2021-08-26 29 struct inode inode; 1b7646014e0d83 Christoph Hellwig 2021-08-26 30 struct cdev cdev; 1b7646014e0d83 Christoph Hellwig 2021-08-26 31 void *private; 1b7646014e0d83 Christoph Hellwig 2021-08-26 32 unsigned long flags; 1b7646014e0d83 Christoph Hellwig 2021-08-26 33 const struct dax_operations *ops; 8012b866085523 Shiyang Ruan 2022-06-03 34 void *holder_data; 8012b866085523 Shiyang Ruan 2022-06-03 35 const struct dax_holder_operations *holder_ops; 63101913bbd057 Long Li 2024-02-07 36 63101913bbd057 Long Li 2024-02-07 37 KABI_RESERVE(1) 63101913bbd057 Long Li 2024-02-07 38 KABI_RESERVE(2) 63101913bbd057 Long Li 2024-02-07 39 KABI_RESERVE(3) 63101913bbd057 Long Li 2024-02-07 40 KABI_RESERVE(4) 63101913bbd057 Long Li 2024-02-07 41 KABI_RESERVE(5) 63101913bbd057 Long Li 2024-02-07 42 KABI_RESERVE(6) 63101913bbd057 Long Li 2024-02-07 43 KABI_RESERVE(7) 63101913bbd057 Long Li 2024-02-07 44 KABI_RESERVE(8) 1b7646014e0d83 Christoph Hellwig 2021-08-26 @45 }; 1b7646014e0d83 Christoph Hellwig 2021-08-26 46 :::::: The code at line 45 was first introduced by commit :::::: 1b7646014e0d838b06be7288e2dec3262948cc56 dax: mark dax_get_by_host static :::::: TO: Christoph Hellwig <hch@lst.de> :::::: CC: Dan Williams <dan.j.williams@intel.com> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki