tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: be758a5796c3d280deb877699c41fd0cd04e1deb commit: 5a72d2e54e8ff7c7f9510de875cf201ad18f36c4 [2910/2910] mm/shmem, swap: fix softlockup with mTHP swapin config: x86_64-buildonly-randconfig-002-20250923 (https://download.01.org/0day-ci/archive/20250923/202509231547.ijXKrDIl-lkp@i...) compiler: gcc-14 (Debian 14.2.0-19) 14.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250923/202509231547.ijXKrDIl-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/202509231547.ijXKrDIl-lkp@intel.com/ All errors (new ones prefixed by >>): In file included from mm/shmem.c:43: mm/swap.h: In function 'non_swapcache_batch':

...

mm/swap.h:66:26: error: implicit declaration of function 'swp_offset'; did you mean 'pud_offset'? [-Wimplicit-function-declaration] 66 | pgoff_t offset = swp_offset(entry); | ^~~~~~~~~~ | pud_offset In file included from mm/shmem.c:68: include/linux/swapops.h: At top level: include/linux/swapops.h:107:23: error: conflicting types for 'swp_offset'; have 'long unsigned int(swp_entry_t)' 107 | static inline pgoff_t swp_offset(swp_entry_t entry) | ^~~~~~~~~~ mm/swap.h:66:26: note: previous implicit declaration of 'swp_offset' with type 'int()' 66 | pgoff_t offset = swp_offset(entry); | ^~~~~~~~~~

Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for ACPI_HOTPLUG_IGNORE_OSC Depends on [n]: ACPI [=y] && ACPI_HOTPLUG_CPU [=n] Selected by [y]: - X86 [=y] && ACPI [=y] && HOTPLUG_CPU [=y] vim +66 mm/swap.h 62 63 static inline int non_swapcache_batch(swp_entry_t entry, int max_nr) 64 { 65 struct swap_info_struct *si = swp_swap_info(entry);

66 pgoff_t offset = swp_offset(entry); 67 int i; 68 69 /* 70 * While allocating a large folio and doing mTHP swapin, we need to 71 * ensure all entries are not cached, otherwise, the mTHP folio will 72 * be in conflict with the folio in swap cache. 73 */ 74 for (i = 0; i < max_nr; i++) { 75 if ((si->swap_map[offset + i] & SWAP_HAS_CACHE)) 76 return i; 77 } 78 79 return i; 80 } 81

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