[anolis-intel-cloud:devel-6.6 2/2] mm/ksm.c:146: warning: Function parameter or member 'CK_KABI_RESERVE(1' not described in 'ksm_scan'

[anolis-intel-cloud:devel-6.6 2/2] mm/ksm.c:146: warning: Function parameter or member 'CK_KABI_RESERVE(1' not described in 'ksm_scan'

[kernel test robot]

Hi Guixin,

FYI, the error/warning still remains.

tree:   https://gitee.com/anolis/intel-cloud-kernel.git devel-6.6
head:   f64b5635bc6da0e12f72f202d7ac1b5bb5457209
commit: ef314e56b70f4662163f3e1e094bcfa9627674c5 [2/2] anolis: kabi: reserve some space for kABI
config: x86_64-anolis-intel-cloud-devel-6.6 (https://download.01.org/0day-ci/archive/20260105/202601051237.571fhLvp-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.4.0-5) 12.4.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260105/202601051237.571fhLvp-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202601051237.571fhLvp-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> mm/ksm.c:146: warning: Function parameter or member 'CK_KABI_RESERVE(1' not described in 'ksm_scan'


vim +146 mm/ksm.c

31dbd01f314364 Izik Eidus   2009-09-21  128  
31dbd01f314364 Izik Eidus   2009-09-21  129  /**
31dbd01f314364 Izik Eidus   2009-09-21  130   * struct ksm_scan - cursor for scanning
31dbd01f314364 Izik Eidus   2009-09-21  131   * @mm_slot: the current mm_slot we are scanning
31dbd01f314364 Izik Eidus   2009-09-21  132   * @address: the next address inside that to be scanned
6514d511dbe5a7 Hugh Dickins 2009-12-14  133   * @rmap_list: link to the next rmap to be scanned in the rmap_list
31dbd01f314364 Izik Eidus   2009-09-21  134   * @seqnr: count of completed full scans (needed when removing unstable node)
31dbd01f314364 Izik Eidus   2009-09-21  135   *
31dbd01f314364 Izik Eidus   2009-09-21  136   * There is only the one ksm_scan instance of this cursor structure.
31dbd01f314364 Izik Eidus   2009-09-21  137   */
31dbd01f314364 Izik Eidus   2009-09-21  138  struct ksm_scan {
21fbd59136e077 Qi Zheng     2022-08-31  139  	struct ksm_mm_slot *mm_slot;
31dbd01f314364 Izik Eidus   2009-09-21  140  	unsigned long address;
21fbd59136e077 Qi Zheng     2022-08-31  141  	struct ksm_rmap_item **rmap_list;
31dbd01f314364 Izik Eidus   2009-09-21  142  	unsigned long seqnr;
ef314e56b70f46 Guixin Liu   2024-08-26  143  
ef314e56b70f46 Guixin Liu   2024-08-26  144  	CK_KABI_RESERVE(1)
ef314e56b70f46 Guixin Liu   2024-08-26  145  	CK_KABI_RESERVE(2)
31dbd01f314364 Izik Eidus   2009-09-21 @146  };
31dbd01f314364 Izik Eidus   2009-09-21  147  

:::::: The code at line 146 was first introduced by commit
:::::: 31dbd01f314364b70c2e026a5793a29a4da8a9dc ksm: Kernel SamePage Merging

:::::: TO: Izik Eidus <ieidus@redhat.com>
:::::: CC: Linus Torvalds <torvalds@linux-foundation.org>

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