Re: [PATCH] mm: use enum for vm_flags

From: kernel test robot
Date: Fri Oct 10 2025 - 20:19:07 EST

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Hi Jakub,

kernel test robot noticed the following build errors:

[auto build test ERROR on akpm-mm/mm-everything]

url: https://github.com/intel-lab-lkp/linux/commits/Jakub-Acs/mm-use-enum-for-vm_flags/20251010-124738
base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link: https://lore.kernel.org/r/20251008125427.68735-1-acsjakub%40amazon.de
patch subject: [PATCH] mm: use enum for vm_flags
config: s390-randconfig-001-20251011 (https://download.01.org/0day-ci/archive/20251011/202510110743.9G4osLTr-lkp@xxxxxxxxx/config)
compiler: s390-linux-gcc (GCC) 9.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251011/202510110743.9G4osLTr-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/202510110743.9G4osLTr-lkp@xxxxxxxxx/

All error/warnings (new ones prefixed by >>):

In file included from arch/s390/include/asm/mmu_context.h:11,
from arch/s390/include/asm/elf.h:178,
from include/linux/elf.h:6,
from include/linux/module.h:20,
from include/linux/device/driver.h:21,
from include/linux/device.h:32,
from include/linux/node.h:18,
from include/linux/cpu.h:17,
from include/linux/static_call.h:135,
from include/linux/tracepoint.h:22,
from include/linux/mm.h:39,
from include/linux/pid_namespace.h:7,
from include/linux/ptrace.h:10,
from arch/s390/include/asm/stacktrace.h:7,
from arch/s390/kernel/asm-offsets.c:15:
arch/s390/include/asm/pgalloc.h: In function 'p4d_alloc_one_noprof':
>> arch/s390/include/asm/pgalloc.h:62:2: error: implicit declaration of function 'pagetable_p4d_ctor' [-Werror=implicit-function-declaration]
62 | pagetable_p4d_ctor(virt_to_ptdesc(table));
| ^~~~~~~~~~~~~~~~~~
>> arch/s390/include/asm/pgalloc.h:62:21: error: implicit declaration of function 'virt_to_ptdesc'; did you mean 'virt_to_kpte'? [-Werror=implicit-function-declaration]
62 | pagetable_p4d_ctor(virt_to_ptdesc(table));
| ^~~~~~~~~~~~~~
| virt_to_kpte
arch/s390/include/asm/pgalloc.h: In function 'p4d_free':
>> arch/s390/include/asm/pgalloc.h:73:2: error: implicit declaration of function 'pagetable_dtor'; did you mean 'page_table_free'? [-Werror=implicit-function-declaration]
73 | pagetable_dtor(virt_to_ptdesc(p4d));
| ^~~~~~~~~~~~~~
| page_table_free
arch/s390/include/asm/pgalloc.h: In function 'pud_alloc_one_noprof':
>> arch/s390/include/asm/pgalloc.h:84:2: error: implicit declaration of function 'pagetable_pud_ctor' [-Werror=implicit-function-declaration]
84 | pagetable_pud_ctor(virt_to_ptdesc(table));
| ^~~~~~~~~~~~~~~~~~
arch/s390/include/asm/pgalloc.h: In function 'pmd_alloc_one_noprof':
>> arch/s390/include/asm/pgalloc.h:106:7: error: implicit declaration of function 'pagetable_pmd_ctor' [-Werror=implicit-function-declaration]
106 | if (!pagetable_pmd_ctor(mm, virt_to_ptdesc(table))) {
| ^~~~~~~~~~~~~~~~~~
arch/s390/include/asm/pgalloc.h: In function 'pgd_alloc_noprof':
>> arch/s390/include/asm/pgalloc.h:143:2: error: implicit declaration of function 'pagetable_pgd_ctor' [-Werror=implicit-function-declaration]
143 | pagetable_pgd_ctor(virt_to_ptdesc(table));
| ^~~~~~~~~~~~~~~~~~
In file included from include/linux/pid_namespace.h:7,
from include/linux/ptrace.h:10,
from arch/s390/include/asm/stacktrace.h:7,
from arch/s390/kernel/asm-offsets.c:15:
include/linux/mm.h: At top level:
>> include/linux/mm.h:3011:30: error: conflicting types for 'virt_to_ptdesc'
3011 | static inline struct ptdesc *virt_to_ptdesc(const void *x)
| ^~~~~~~~~~~~~~
In file included from arch/s390/include/asm/mmu_context.h:11,
from arch/s390/include/asm/elf.h:178,
from include/linux/elf.h:6,
from include/linux/module.h:20,
from include/linux/device/driver.h:21,
from include/linux/device.h:32,
from include/linux/node.h:18,
from include/linux/cpu.h:17,
from include/linux/static_call.h:135,
from include/linux/tracepoint.h:22,
from include/linux/mm.h:39,
from include/linux/pid_namespace.h:7,
from include/linux/ptrace.h:10,
from arch/s390/include/asm/stacktrace.h:7,
from arch/s390/kernel/asm-offsets.c:15:
arch/s390/include/asm/pgalloc.h:62:21: note: previous implicit declaration of 'virt_to_ptdesc' was here
62 | pagetable_p4d_ctor(virt_to_ptdesc(table));
| ^~~~~~~~~~~~~~
In file included from include/linux/pid_namespace.h:7,
from include/linux/ptrace.h:10,
from arch/s390/include/asm/stacktrace.h:7,
from arch/s390/kernel/asm-offsets.c:15:
>> include/linux/mm.h:3152:20: warning: conflicting types for 'pagetable_dtor'
3152 | static inline void pagetable_dtor(struct ptdesc *ptdesc)
| ^~~~~~~~~~~~~~
>> include/linux/mm.h:3152:20: error: static declaration of 'pagetable_dtor' follows non-static declaration
In file included from arch/s390/include/asm/mmu_context.h:11,
from arch/s390/include/asm/elf.h:178,
from include/linux/elf.h:6,
from include/linux/module.h:20,
from include/linux/device/driver.h:21,
from include/linux/device.h:32,
from include/linux/node.h:18,
from include/linux/cpu.h:17,
from include/linux/static_call.h:135,
from include/linux/tracepoint.h:22,
from include/linux/mm.h:39,
from include/linux/pid_namespace.h:7,
from include/linux/ptrace.h:10,
from arch/s390/include/asm/stacktrace.h:7,
from arch/s390/kernel/asm-offsets.c:15:
arch/s390/include/asm/pgalloc.h:73:2: note: previous implicit declaration of 'pagetable_dtor' was here
73 | pagetable_dtor(virt_to_ptdesc(p4d));
| ^~~~~~~~~~~~~~
In file included from include/linux/pid_namespace.h:7,
from include/linux/ptrace.h:10,
from arch/s390/include/asm/stacktrace.h:7,
from arch/s390/kernel/asm-offsets.c:15:
>> include/linux/mm.h:3274:20: error: conflicting types for 'pagetable_pmd_ctor'
3274 | static inline bool pagetable_pmd_ctor(struct mm_struct *mm,
| ^~~~~~~~~~~~~~~~~~
In file included from arch/s390/include/asm/mmu_context.h:11,
from arch/s390/include/asm/elf.h:178,
from include/linux/elf.h:6,
from include/linux/module.h:20,
from include/linux/device/driver.h:21,
from include/linux/device.h:32,
from include/linux/node.h:18,
from include/linux/cpu.h:17,
from include/linux/static_call.h:135,
from include/linux/tracepoint.h:22,
from include/linux/mm.h:39,
from include/linux/pid_namespace.h:7,
from include/linux/ptrace.h:10,
from arch/s390/include/asm/stacktrace.h:7,
from arch/s390/kernel/asm-offsets.c:15:
arch/s390/include/asm/pgalloc.h:106:7: note: previous implicit declaration of 'pagetable_pmd_ctor' was here
106 | if (!pagetable_pmd_ctor(mm, virt_to_ptdesc(table))) {
| ^~~~~~~~~~~~~~~~~~
In file included from include/linux/pid_namespace.h:7,
from include/linux/ptrace.h:10,
from arch/s390/include/asm/stacktrace.h:7,
from arch/s390/kernel/asm-offsets.c:15:
>> include/linux/mm.h:3303:20: warning: conflicting types for 'pagetable_pud_ctor'
3303 | static inline void pagetable_pud_ctor(struct ptdesc *ptdesc)
| ^~~~~~~~~~~~~~~~~~
>> include/linux/mm.h:3303:20: error: static declaration of 'pagetable_pud_ctor' follows non-static declaration
In file included from arch/s390/include/asm/mmu_context.h:11,
from arch/s390/include/asm/elf.h:178,
from include/linux/elf.h:6,
from include/linux/module.h:20,
from include/linux/device/driver.h:21,
from include/linux/device.h:32,
from include/linux/node.h:18,
from include/linux/cpu.h:17,
from include/linux/static_call.h:135,
from include/linux/tracepoint.h:22,
from include/linux/mm.h:39,
from include/linux/pid_namespace.h:7,
from include/linux/ptrace.h:10,
from arch/s390/include/asm/stacktrace.h:7,
from arch/s390/kernel/asm-offsets.c:15:
arch/s390/include/asm/pgalloc.h:84:2: note: previous implicit declaration of 'pagetable_pud_ctor' was here
84 | pagetable_pud_ctor(virt_to_ptdesc(table));
| ^~~~~~~~~~~~~~~~~~
In file included from include/linux/pid_namespace.h:7,
from include/linux/ptrace.h:10,
from arch/s390/include/asm/stacktrace.h:7,
from arch/s390/kernel/asm-offsets.c:15:
>> include/linux/mm.h:3308:20: warning: conflicting types for 'pagetable_p4d_ctor'
3308 | static inline void pagetable_p4d_ctor(struct ptdesc *ptdesc)
| ^~~~~~~~~~~~~~~~~~
>> include/linux/mm.h:3308:20: error: static declaration of 'pagetable_p4d_ctor' follows non-static declaration
In file included from arch/s390/include/asm/mmu_context.h:11,
from arch/s390/include/asm/elf.h:178,
from include/linux/elf.h:6,
from include/linux/module.h:20,
from include/linux/device/driver.h:21,
from include/linux/device.h:32,
from include/linux/node.h:18,
from include/linux/cpu.h:17,
from include/linux/static_call.h:135,
from include/linux/tracepoint.h:22,
from include/linux/mm.h:39,
from include/linux/pid_namespace.h:7,
from include/linux/ptrace.h:10,
from arch/s390/include/asm/stacktrace.h:7,
from arch/s390/kernel/asm-offsets.c:15:
arch/s390/include/asm/pgalloc.h:62:2: note: previous implicit declaration of 'pagetable_p4d_ctor' was here
62 | pagetable_p4d_ctor(virt_to_ptdesc(table));
| ^~~~~~~~~~~~~~~~~~
In file included from include/linux/pid_namespace.h:7,
from include/linux/ptrace.h:10,
from arch/s390/include/asm/stacktrace.h:7,
from arch/s390/kernel/asm-offsets.c:15:
>> include/linux/mm.h:3313:20: warning: conflicting types for 'pagetable_pgd_ctor'
3313 | static inline void pagetable_pgd_ctor(struct ptdesc *ptdesc)
| ^~~~~~~~~~~~~~~~~~
>> include/linux/mm.h:3313:20: error: static declaration of 'pagetable_pgd_ctor' follows non-static declaration
In file included from arch/s390/include/asm/mmu_context.h:11,
from arch/s390/include/asm/elf.h:178,
from include/linux/elf.h:6,
from include/linux/module.h:20,
from include/linux/device/driver.h:21,
from include/linux/device.h:32,
from include/linux/node.h:18,
from include/linux/cpu.h:17,
from include/linux/static_call.h:135,
from include/linux/tracepoint.h:22,
from include/linux/mm.h:39,
from include/linux/pid_namespace.h:7,
from include/linux/ptrace.h:10,
from arch/s390/include/asm/stacktrace.h:7,
from arch/s390/kernel/asm-offsets.c:15:
arch/s390/include/asm/pgalloc.h:143:2: note: previous implicit declaration of 'pagetable_pgd_ctor' was here
143 | pagetable_pgd_ctor(virt_to_ptdesc(table));
| ^~~~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors
make[3]: *** [scripts/Makefile.build:182: arch/s390/kernel/asm-offsets.s] Error 1 shuffle=2098624972
make[3]: Target 'prepare' not remade because of errors.
make[2]: *** [Makefile:1280: prepare0] Error 2 shuffle=2098624972
make[2]: Target 'prepare' not remade because of errors.
make[1]: *** [Makefile:248: __sub-make] Error 2 shuffle=2098624972
make[1]: Target 'prepare' not remade because of errors.
make: *** [Makefile:248: __sub-make] Error 2 shuffle=2098624972
make: Target 'prepare' not remade because of errors.

vim +/virt_to_ptdesc +3011 include/linux/mm.h

522abd92279a8e Matthew Wilcox (Oracle 2025-09-08 3010)
bf2d4334f72e4e Vishal Moola (Oracle 2023-08-07 @3011) static inline struct ptdesc *virt_to_ptdesc(const void *x)
bf2d4334f72e4e Vishal Moola (Oracle 2023-08-07 3012) {
bf2d4334f72e4e Vishal Moola (Oracle 2023-08-07 3013) return page_ptdesc(virt_to_page(x));
bf2d4334f72e4e Vishal Moola (Oracle 2023-08-07 3014) }
bf2d4334f72e4e Vishal Moola (Oracle 2023-08-07 3015)
90ec2df9dd3165 Matthew Wilcox (Oracle 2025-09-08 3016) /**
90ec2df9dd3165 Matthew Wilcox (Oracle 2025-09-08 3017) * ptdesc_address - Virtual address of page table.
90ec2df9dd3165 Matthew Wilcox (Oracle 2025-09-08 3018) * @pt: Page table descriptor.
90ec2df9dd3165 Matthew Wilcox (Oracle 2025-09-08 3019) *
90ec2df9dd3165 Matthew Wilcox (Oracle 2025-09-08 3020) * Return: The first byte of the page table described by @pt.
90ec2df9dd3165 Matthew Wilcox (Oracle 2025-09-08 3021) */
bf2d4334f72e4e Vishal Moola (Oracle 2023-08-07 3022) static inline void *ptdesc_address(const struct ptdesc *pt)
bf2d4334f72e4e Vishal Moola (Oracle 2023-08-07 3023) {
bf2d4334f72e4e Vishal Moola (Oracle 2023-08-07 3024) return folio_address(ptdesc_folio(pt));
bf2d4334f72e4e Vishal Moola (Oracle 2023-08-07 3025) }
bf2d4334f72e4e Vishal Moola (Oracle 2023-08-07 3026)
bf2d4334f72e4e Vishal Moola (Oracle 2023-08-07 3027) static inline bool pagetable_is_reserved(struct ptdesc *pt)
bf2d4334f72e4e Vishal Moola (Oracle 2023-08-07 3028) {
522abd92279a8e Matthew Wilcox (Oracle 2025-09-08 3029) return test_bit(PT_reserved, &pt->pt_flags.f);
bf2d4334f72e4e Vishal Moola (Oracle 2023-08-07 3030) }
bf2d4334f72e4e Vishal Moola (Oracle 2023-08-07 3031)
bf2d4334f72e4e Vishal Moola (Oracle 2023-08-07 3032) /**
bf2d4334f72e4e Vishal Moola (Oracle 2023-08-07 3033) * pagetable_alloc - Allocate pagetables
bf2d4334f72e4e Vishal Moola (Oracle 2023-08-07 3034) * @gfp: GFP flags
bf2d4334f72e4e Vishal Moola (Oracle 2023-08-07 3035) * @order: desired pagetable order
bf2d4334f72e4e Vishal Moola (Oracle 2023-08-07 3036) *
bf2d4334f72e4e Vishal Moola (Oracle 2023-08-07 3037) * pagetable_alloc allocates memory for page tables as well as a page table
bf2d4334f72e4e Vishal Moola (Oracle 2023-08-07 3038) * descriptor to describe that memory.
bf2d4334f72e4e Vishal Moola (Oracle 2023-08-07 3039) *
bf2d4334f72e4e Vishal Moola (Oracle 2023-08-07 3040) * Return: The ptdesc describing the allocated page tables.
bf2d4334f72e4e Vishal Moola (Oracle 2023-08-07 3041) */
2c321f3f70bc28 Suren Baghdasaryan 2024-04-14 3042 static inline struct ptdesc *pagetable_alloc_noprof(gfp_t gfp, unsigned int order)
bf2d4334f72e4e Vishal Moola (Oracle 2023-08-07 3043) {
2c321f3f70bc28 Suren Baghdasaryan 2024-04-14 3044 struct page *page = alloc_pages_noprof(gfp | __GFP_COMP, order);
bf2d4334f72e4e Vishal Moola (Oracle 2023-08-07 3045)
bf2d4334f72e4e Vishal Moola (Oracle 2023-08-07 3046) return page_ptdesc(page);
bf2d4334f72e4e Vishal Moola (Oracle 2023-08-07 3047) }
2c321f3f70bc28 Suren Baghdasaryan 2024-04-14 3048 #define pagetable_alloc(...) alloc_hooks(pagetable_alloc_noprof(__VA_ARGS__))
bf2d4334f72e4e Vishal Moola (Oracle 2023-08-07 3049)
bf2d4334f72e4e Vishal Moola (Oracle 2023-08-07 3050) /**
bf2d4334f72e4e Vishal Moola (Oracle 2023-08-07 3051) * pagetable_free - Free pagetables
bf2d4334f72e4e Vishal Moola (Oracle 2023-08-07 3052) * @pt: The page table descriptor
bf2d4334f72e4e Vishal Moola (Oracle 2023-08-07 3053) *
bf2d4334f72e4e Vishal Moola (Oracle 2023-08-07 3054) * pagetable_free frees the memory of all page tables described by a page
bf2d4334f72e4e Vishal Moola (Oracle 2023-08-07 3055) * table descriptor and the memory for the descriptor itself.
bf2d4334f72e4e Vishal Moola (Oracle 2023-08-07 3056) */
bf2d4334f72e4e Vishal Moola (Oracle 2023-08-07 3057) static inline void pagetable_free(struct ptdesc *pt)
bf2d4334f72e4e Vishal Moola (Oracle 2023-08-07 3058) {
bf2d4334f72e4e Vishal Moola (Oracle 2023-08-07 3059) struct page *page = ptdesc_page(pt);
bf2d4334f72e4e Vishal Moola (Oracle 2023-08-07 3060)
bf2d4334f72e4e Vishal Moola (Oracle 2023-08-07 3061) __free_pages(page, compound_order(page));
bf2d4334f72e4e Vishal Moola (Oracle 2023-08-07 3062) }
bf2d4334f72e4e Vishal Moola (Oracle 2023-08-07 3063)
394290cba9664e David Hildenbrand 2024-07-26 3064 #if defined(CONFIG_SPLIT_PTE_PTLOCKS)
597d795a2a786d Kirill A. Shutemov 2013-12-20 3065 #if ALLOC_SPLIT_PTLOCKS
b35f1819acd924 Kirill A. Shutemov 2014-01-21 3066 void __init ptlock_cache_init(void);
f5ecca06b3a5d0 Vishal Moola (Oracle 2023-08-07 3067) bool ptlock_alloc(struct ptdesc *ptdesc);
6ed1b8a09deb0b Vishal Moola (Oracle 2023-08-07 3068) void ptlock_free(struct ptdesc *ptdesc);
539edb5846c740 Peter Zijlstra 2013-11-14 3069
1865484af6b2ce Vishal Moola (Oracle 2023-08-07 3070) static inline spinlock_t *ptlock_ptr(struct ptdesc *ptdesc)
539edb5846c740 Peter Zijlstra 2013-11-14 3071 {
1865484af6b2ce Vishal Moola (Oracle 2023-08-07 3072) return ptdesc->ptl;
539edb5846c740 Peter Zijlstra 2013-11-14 3073 }
597d795a2a786d Kirill A. Shutemov 2013-12-20 3074 #else /* ALLOC_SPLIT_PTLOCKS */
b35f1819acd924 Kirill A. Shutemov 2014-01-21 3075 static inline void ptlock_cache_init(void)
b35f1819acd924 Kirill A. Shutemov 2014-01-21 3076 {
b35f1819acd924 Kirill A. Shutemov 2014-01-21 3077 }
b35f1819acd924 Kirill A. Shutemov 2014-01-21 3078
f5ecca06b3a5d0 Vishal Moola (Oracle 2023-08-07 3079) static inline bool ptlock_alloc(struct ptdesc *ptdesc)
49076ec2ccaf68 Kirill A. Shutemov 2013-11-14 3080 {
49076ec2ccaf68 Kirill A. Shutemov 2013-11-14 3081 return true;
49076ec2ccaf68 Kirill A. Shutemov 2013-11-14 3082 }
539edb5846c740 Peter Zijlstra 2013-11-14 3083
6ed1b8a09deb0b Vishal Moola (Oracle 2023-08-07 3084) static inline void ptlock_free(struct ptdesc *ptdesc)
49076ec2ccaf68 Kirill A. Shutemov 2013-11-14 3085 {
49076ec2ccaf68 Kirill A. Shutemov 2013-11-14 3086 }
49076ec2ccaf68 Kirill A. Shutemov 2013-11-14 3087
1865484af6b2ce Vishal Moola (Oracle 2023-08-07 3088) static inline spinlock_t *ptlock_ptr(struct ptdesc *ptdesc)
49076ec2ccaf68 Kirill A. Shutemov 2013-11-14 3089 {
1865484af6b2ce Vishal Moola (Oracle 2023-08-07 3090) return &ptdesc->ptl;
49076ec2ccaf68 Kirill A. Shutemov 2013-11-14 3091 }
597d795a2a786d Kirill A. Shutemov 2013-12-20 3092 #endif /* ALLOC_SPLIT_PTLOCKS */
49076ec2ccaf68 Kirill A. Shutemov 2013-11-14 3093
49076ec2ccaf68 Kirill A. Shutemov 2013-11-14 3094 static inline spinlock_t *pte_lockptr(struct mm_struct *mm, pmd_t *pmd)
49076ec2ccaf68 Kirill A. Shutemov 2013-11-14 3095 {
1865484af6b2ce Vishal Moola (Oracle 2023-08-07 3096) return ptlock_ptr(page_ptdesc(pmd_page(*pmd)));
49076ec2ccaf68 Kirill A. Shutemov 2013-11-14 3097 }
49076ec2ccaf68 Kirill A. Shutemov 2013-11-14 3098
5f75cfbd6bb022 David Hildenbrand 2024-08-01 3099 static inline spinlock_t *ptep_lockptr(struct mm_struct *mm, pte_t *pte)
5f75cfbd6bb022 David Hildenbrand 2024-08-01 3100 {
5f75cfbd6bb022 David Hildenbrand 2024-08-01 3101 BUILD_BUG_ON(IS_ENABLED(CONFIG_HIGHPTE));
5f75cfbd6bb022 David Hildenbrand 2024-08-01 3102 BUILD_BUG_ON(MAX_PTRS_PER_PTE * sizeof(pte_t) > PAGE_SIZE);
5f75cfbd6bb022 David Hildenbrand 2024-08-01 3103 return ptlock_ptr(virt_to_ptdesc(pte));
5f75cfbd6bb022 David Hildenbrand 2024-08-01 3104 }
5f75cfbd6bb022 David Hildenbrand 2024-08-01 3105
75b25d49ca6638 Vishal Moola (Oracle 2023-08-07 3106) static inline bool ptlock_init(struct ptdesc *ptdesc)
49076ec2ccaf68 Kirill A. Shutemov 2013-11-14 3107 {
4c21e2f2441dc5 Hugh Dickins 2005-10-29 3108 /*
49076ec2ccaf68 Kirill A. Shutemov 2013-11-14 3109 * prep_new_page() initialize page->private (and therefore page->ptl)
49076ec2ccaf68 Kirill A. Shutemov 2013-11-14 3110 * with 0. Make sure nobody took it in use in between.
49076ec2ccaf68 Kirill A. Shutemov 2013-11-14 3111 *
49076ec2ccaf68 Kirill A. Shutemov 2013-11-14 3112 * It can happen if arch try to use slab for page table allocation:
1d798ca3f16437 Kirill A. Shutemov 2015-11-06 3113 * slab code uses page->slab_cache, which share storage with page->ptl.
4c21e2f2441dc5 Hugh Dickins 2005-10-29 3114 */
75b25d49ca6638 Vishal Moola (Oracle 2023-08-07 3115) VM_BUG_ON_PAGE(*(unsigned long *)&ptdesc->ptl, ptdesc_page(ptdesc));
75b25d49ca6638 Vishal Moola (Oracle 2023-08-07 3116) if (!ptlock_alloc(ptdesc))
49076ec2ccaf68 Kirill A. Shutemov 2013-11-14 3117 return false;
75b25d49ca6638 Vishal Moola (Oracle 2023-08-07 3118) spin_lock_init(ptlock_ptr(ptdesc));
49076ec2ccaf68 Kirill A. Shutemov 2013-11-14 3119 return true;
49076ec2ccaf68 Kirill A. Shutemov 2013-11-14 3120 }
49076ec2ccaf68 Kirill A. Shutemov 2013-11-14 3121
394290cba9664e David Hildenbrand 2024-07-26 3122 #else /* !defined(CONFIG_SPLIT_PTE_PTLOCKS) */
4c21e2f2441dc5 Hugh Dickins 2005-10-29 3123 /*
4c21e2f2441dc5 Hugh Dickins 2005-10-29 3124 * We use mm->page_table_lock to guard all pagetable pages of the mm.
4c21e2f2441dc5 Hugh Dickins 2005-10-29 3125 */
49076ec2ccaf68 Kirill A. Shutemov 2013-11-14 3126 static inline spinlock_t *pte_lockptr(struct mm_struct *mm, pmd_t *pmd)
49076ec2ccaf68 Kirill A. Shutemov 2013-11-14 3127 {
49076ec2ccaf68 Kirill A. Shutemov 2013-11-14 3128 return &mm->page_table_lock;
49076ec2ccaf68 Kirill A. Shutemov 2013-11-14 3129 }
5f75cfbd6bb022 David Hildenbrand 2024-08-01 3130 static inline spinlock_t *ptep_lockptr(struct mm_struct *mm, pte_t *pte)
5f75cfbd6bb022 David Hildenbrand 2024-08-01 3131 {
5f75cfbd6bb022 David Hildenbrand 2024-08-01 3132 return &mm->page_table_lock;
5f75cfbd6bb022 David Hildenbrand 2024-08-01 3133 }
b35f1819acd924 Kirill A. Shutemov 2014-01-21 3134 static inline void ptlock_cache_init(void) {}
75b25d49ca6638 Vishal Moola (Oracle 2023-08-07 3135) static inline bool ptlock_init(struct ptdesc *ptdesc) { return true; }
6ed1b8a09deb0b Vishal Moola (Oracle 2023-08-07 3136) static inline void ptlock_free(struct ptdesc *ptdesc) {}
394290cba9664e David Hildenbrand 2024-07-26 3137 #endif /* defined(CONFIG_SPLIT_PTE_PTLOCKS) */
4c21e2f2441dc5 Hugh Dickins 2005-10-29 3138
f0c92726e89f5c Matthew Wilcox (Oracle 2025-09-08 3139) static inline unsigned long ptdesc_nr_pages(const struct ptdesc *ptdesc)
f0c92726e89f5c Matthew Wilcox (Oracle 2025-09-08 3140) {
f0c92726e89f5c Matthew Wilcox (Oracle 2025-09-08 3141) return compound_nr(ptdesc_page(ptdesc));
f0c92726e89f5c Matthew Wilcox (Oracle 2025-09-08 3142) }
f0c92726e89f5c Matthew Wilcox (Oracle 2025-09-08 3143)
11e2400b21a3e2 Kevin Brodsky 2025-01-03 3144 static inline void __pagetable_ctor(struct ptdesc *ptdesc)
2f569afd9ced9e Martin Schwidefsky 2008-02-08 3145 {
f0c92726e89f5c Matthew Wilcox (Oracle 2025-09-08 3146) pg_data_t *pgdat = NODE_DATA(memdesc_nid(ptdesc->pt_flags));
7e11dca14b27e1 Vishal Moola (Oracle 2023-08-07 3147)
f0c92726e89f5c Matthew Wilcox (Oracle 2025-09-08 3148) __SetPageTable(ptdesc_page(ptdesc));
f0c92726e89f5c Matthew Wilcox (Oracle 2025-09-08 3149) mod_node_page_state(pgdat, NR_PAGETABLE, ptdesc_nr_pages(ptdesc));
2f569afd9ced9e Martin Schwidefsky 2008-02-08 3150 }
2f569afd9ced9e Martin Schwidefsky 2008-02-08 3151
db6b435d731a8d Qi Zheng 2025-01-08 @3152 static inline void pagetable_dtor(struct ptdesc *ptdesc)
7e11dca14b27e1 Vishal Moola (Oracle 2023-08-07 3153) {
f0c92726e89f5c Matthew Wilcox (Oracle 2025-09-08 3154) pg_data_t *pgdat = NODE_DATA(memdesc_nid(ptdesc->pt_flags));
7e11dca14b27e1 Vishal Moola (Oracle 2023-08-07 3155)
7e11dca14b27e1 Vishal Moola (Oracle 2023-08-07 3156) ptlock_free(ptdesc);
f0c92726e89f5c Matthew Wilcox (Oracle 2025-09-08 3157) __ClearPageTable(ptdesc_page(ptdesc));
f0c92726e89f5c Matthew Wilcox (Oracle 2025-09-08 3158) mod_node_page_state(pgdat, NR_PAGETABLE, -ptdesc_nr_pages(ptdesc));
7e11dca14b27e1 Vishal Moola (Oracle 2023-08-07 3159) }
7e11dca14b27e1 Vishal Moola (Oracle 2023-08-07 3160)

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