Hi Alexander, FYI, the error/warning still remains. tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: 89f3a2595f2e3f14f976811d203bd8f55ff4eada commit: 91bac2310ae7eca9d9869222c96fcc3d02851eea [1659/1659] mm: add function __putback_isolated_page config: arm64-allnoconfig (https://download.01.org/0day-ci/archive/20250606/202506061449.nBm6oAvj-lkp@i...) compiler: aarch64-linux-gcc (GCC) 15.1.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250606/202506061449.nBm6oAvj-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/202506061449.nBm6oAvj-lkp@intel.com/ All warnings (new ones prefixed by >>): In function '__cmpxchg_case_acq_4', inlined from '__cmpxchg_acq' at arch/arm64/include/asm/cmpxchg.h:141:1, inlined from 'queued_spin_lock' at include/asm-generic/qspinlock.h:85:8, inlined from 'do_raw_spin_lock' at include/linux/spinlock.h:180:2, inlined from '__raw_spin_lock' at include/linux/spinlock_api_smp.h:143:2, inlined from 'spin_lock' at include/linux/spinlock.h:329:2, inlined from '__build_all_zonelists' at mm/page_alloc.c:5529:2: arch/arm64/include/asm/atomic_ll_sc.h:259:9: warning: array subscript 'long unsigned int[0]' is partly outside array bounds of 'spinlock_t[1]' {aka 'struct spinlock[1]'} [-Warray-bounds=] 259 | asm volatile( \ | ^~~ arch/arm64/include/asm/atomic_ll_sc.h:283:1: note: in expansion of macro '__CMPXCHG_CASE' 283 | __CMPXCHG_CASE(w, , acq_4, , a, , "memory") | ^~~~~~~~~~~~~~ mm/page_alloc.c: In function '__build_all_zonelists': mm/page_alloc.c:5527:32: note: object 'lock' of size 4 5527 | static DEFINE_SPINLOCK(lock); | ^~~~ include/linux/spinlock_types.h:81:44: note: in definition of macro 'DEFINE_SPINLOCK' 81 | #define DEFINE_SPINLOCK(x) spinlock_t x = __SPIN_LOCK_UNLOCKED(x) | ^ In function '__cmpxchg_case_acq_4', inlined from '__cmpxchg_acq' at arch/arm64/include/asm/cmpxchg.h:141:1, inlined from 'queued_spin_lock' at include/asm-generic/qspinlock.h:85:8, inlined from 'do_raw_spin_lock' at include/linux/spinlock.h:180:2, inlined from '__raw_spin_lock' at include/linux/spinlock_api_smp.h:143:2, inlined from 'spin_lock' at include/linux/spinlock.h:329:2, inlined from 'adjust_managed_page_count' at mm/page_alloc.c:7188:2: arch/arm64/include/asm/atomic_ll_sc.h:259:9: warning: array subscript 'long unsigned int[0]' is partly outside array bounds of 'spinlock_t[1]' {aka 'struct spinlock[1]'} [-Warray-bounds=] 259 | asm volatile( \ | ^~~ arch/arm64/include/asm/atomic_ll_sc.h:283:1: note: in expansion of macro '__CMPXCHG_CASE' 283 | __CMPXCHG_CASE(w, , acq_4, , a, , "memory") | ^~~~~~~~~~~~~~ mm/page_alloc.c: In function 'adjust_managed_page_count': mm/page_alloc.c:127:24: note: object 'managed_page_count_lock' of size 4 127 | static DEFINE_SPINLOCK(managed_page_count_lock); | ^~~~~~~~~~~~~~~~~~~~~~~ include/linux/spinlock_types.h:81:44: note: in definition of macro 'DEFINE_SPINLOCK' 81 | #define DEFINE_SPINLOCK(x) spinlock_t x = __SPIN_LOCK_UNLOCKED(x) | ^ In function '__cmpxchg_case_acq_4', inlined from '__cmpxchg_acq' at arch/arm64/include/asm/cmpxchg.h:141:1, inlined from 'queued_spin_lock' at include/asm-generic/qspinlock.h:85:8, inlined from 'do_raw_spin_lock' at include/linux/spinlock.h:180:2, inlined from '__raw_spin_lock' at include/linux/spinlock_api_smp.h:143:2, inlined from 'spin_lock' at include/linux/spinlock.h:329:2, inlined from 'adjust_managed_page_count' at mm/page_alloc.c:7188:2: arch/arm64/include/asm/atomic_ll_sc.h:259:9: warning: array subscript 'long unsigned int[0]' is partly outside array bounds of 'spinlock_t[1]' {aka 'struct spinlock[1]'} [-Warray-bounds=] 259 | asm volatile( \ | ^~~ arch/arm64/include/asm/atomic_ll_sc.h:283:1: note: in expansion of macro '__CMPXCHG_CASE' 283 | __CMPXCHG_CASE(w, , acq_4, , a, , "memory") | ^~~~~~~~~~~~~~ mm/page_alloc.c: In function 'adjust_managed_page_count': mm/page_alloc.c:127:24: note: object 'managed_page_count_lock' of size 4 127 | static DEFINE_SPINLOCK(managed_page_count_lock); | ^~~~~~~~~~~~~~~~~~~~~~~ include/linux/spinlock_types.h:81:44: note: in definition of macro 'DEFINE_SPINLOCK' 81 | #define DEFINE_SPINLOCK(x) spinlock_t x = __SPIN_LOCK_UNLOCKED(x) | ^ In function '__cmpxchg_case_acq_4', inlined from '__cmpxchg_acq' at arch/arm64/include/asm/cmpxchg.h:141:1, inlined from 'queued_spin_lock' at include/asm-generic/qspinlock.h:85:8, inlined from 'do_raw_spin_lock' at include/linux/spinlock.h:180:2, inlined from '__raw_spin_lock' at include/linux/spinlock_api_smp.h:143:2, inlined from 'spin_lock' at include/linux/spinlock.h:329:2, inlined from 'setup_per_zone_wmarks' at mm/page_alloc.c:7504:2: arch/arm64/include/asm/atomic_ll_sc.h:259:9: warning: array subscript 'long unsigned int[0]' is partly outside array bounds of 'spinlock_t[1]' {aka 'struct spinlock[1]'} [-Warray-bounds=] 259 | asm volatile( \ | ^~~ arch/arm64/include/asm/atomic_ll_sc.h:283:1: note: in expansion of macro '__CMPXCHG_CASE' 283 | __CMPXCHG_CASE(w, , acq_4, , a, , "memory") | ^~~~~~~~~~~~~~ mm/page_alloc.c: In function 'setup_per_zone_wmarks': mm/page_alloc.c:7502:32: note: object 'lock' of size 4 7502 | static DEFINE_SPINLOCK(lock); | ^~~~ include/linux/spinlock_types.h:81:44: note: in definition of macro 'DEFINE_SPINLOCK' 81 | #define DEFINE_SPINLOCK(x) spinlock_t x = __SPIN_LOCK_UNLOCKED(x) | ^ In function '__cmpxchg_case_acq_4', inlined from '__cmpxchg_acq' at arch/arm64/include/asm/cmpxchg.h:141:1, inlined from 'queued_spin_lock' at include/asm-generic/qspinlock.h:85:8, inlined from 'do_raw_spin_lock' at include/linux/spinlock.h:180:2, inlined from '__raw_spin_lock' at include/linux/spinlock_api_smp.h:143:2, inlined from 'spin_lock' at include/linux/spinlock.h:329:2, inlined from 'setup_per_zone_wmarks' at mm/page_alloc.c:7504:2: arch/arm64/include/asm/atomic_ll_sc.h:259:9: warning: array subscript 'long unsigned int[0]' is partly outside array bounds of 'spinlock_t[1]' {aka 'struct spinlock[1]'} [-Warray-bounds=] 259 | asm volatile( \ | ^~~ arch/arm64/include/asm/atomic_ll_sc.h:283:1: note: in expansion of macro '__CMPXCHG_CASE' 283 | __CMPXCHG_CASE(w, , acq_4, , a, , "memory") | ^~~~~~~~~~~~~~ mm/page_alloc.c: In function 'setup_per_zone_wmarks': mm/page_alloc.c:7502:32: note: object 'lock' of size 4 7502 | static DEFINE_SPINLOCK(lock); | ^~~~ include/linux/spinlock_types.h:81:44: note: in definition of macro 'DEFINE_SPINLOCK' 81 | #define DEFINE_SPINLOCK(x) spinlock_t x = __SPIN_LOCK_UNLOCKED(x) | ^

...

mm/page_alloc.c:3005: warning: Function parameter or member 'mt' not described in '__putback_isolated_page'

vim +3005 mm/page_alloc.c 2995 2996 /** 2997 * __putback_isolated_page - Return a now-isolated page back where we got it 2998 * @page: Page that was isolated 2999 * @order: Order of the isolated page 3000 * 3001 * This function is meant to return a page pulled from the free lists via 3002 * __isolate_free_page back to the free lists they were pulled from. 3003 */ 3004 void __putback_isolated_page(struct page *page, unsigned int order, int mt)

3005 { 3006 struct zone *zone = page_zone(page); 3007 3008 /* zone lock should be held when this function is called */ 3009 lockdep_assert_held(&zone->lock); 3010 3011 /* Return isolated page to tail of freelist. */ 3012 __free_one_page(page, page_to_pfn(page), zone, order, mt); 3013 } 3014

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