1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_HUGETLB_H
3 #define _LINUX_HUGETLB_H
5 #include <linux/mm_types.h>
6 #include <linux/mmdebug.h>
8 #include <linux/hugetlb_inline.h>
9 #include <linux/cgroup.h>
10 #include <linux/list.h>
11 #include <linux/kref.h>
12 #include <linux/pgtable.h>
13 #include <linux/gfp.h>
20 typedef struct { unsigned long pd; } hugepd_t;
21 #define is_hugepd(hugepd) (0)
22 #define __hugepd(x) ((hugepd_t) { (x) })
25 #ifdef CONFIG_HUGETLB_PAGE
27 #include <linux/mempolicy.h>
28 #include <linux/shm.h>
29 #include <asm/tlbflush.h>
31 struct hugepage_subpool {
34 long max_hpages; /* Maximum huge pages or -1 if no maximum. */
35 long used_hpages; /* Used count against maximum, includes */
36 /* both alloced and reserved pages. */
37 struct hstate *hstate;
38 long min_hpages; /* Minimum huge pages or -1 if no minimum. */
39 long rsv_hpages; /* Pages reserved against global pool to */
40 /* satisfy minimum size. */
46 struct list_head regions;
47 long adds_in_progress;
48 struct list_head region_cache;
49 long region_cache_count;
50 #ifdef CONFIG_CGROUP_HUGETLB
52 * On private mappings, the counter to uncharge reservations is stored
53 * here. If these fields are 0, then either the mapping is shared, or
54 * cgroup accounting is disabled for this resv_map.
56 struct page_counter *reservation_counter;
57 unsigned long pages_per_hpage;
58 struct cgroup_subsys_state *css;
63 * Region tracking -- allows tracking of reservations and instantiated pages
64 * across the pages in a mapping.
66 * The region data structures are embedded into a resv_map and protected
67 * by a resv_map's lock. The set of regions within the resv_map represent
68 * reservations for huge pages, or huge pages that have already been
69 * instantiated within the map. The from and to elements are huge page
70 * indicies into the associated mapping. from indicates the starting index
71 * of the region. to represents the first index past the end of the region.
73 * For example, a file region structure with from == 0 and to == 4 represents
74 * four huge pages in a mapping. It is important to note that the to element
75 * represents the first element past the end of the region. This is used in
76 * arithmetic as 4(to) - 0(from) = 4 huge pages in the region.
78 * Interval notation of the form [from, to) will be used to indicate that
79 * the endpoint from is inclusive and to is exclusive.
82 struct list_head link;
85 #ifdef CONFIG_CGROUP_HUGETLB
87 * On shared mappings, each reserved region appears as a struct
88 * file_region in resv_map. These fields hold the info needed to
89 * uncharge each reservation.
91 struct page_counter *reservation_counter;
92 struct cgroup_subsys_state *css;
96 extern struct resv_map *resv_map_alloc(void);
97 void resv_map_release(struct kref *ref);
99 extern spinlock_t hugetlb_lock;
100 extern int hugetlb_max_hstate __read_mostly;
101 #define for_each_hstate(h) \
102 for ((h) = hstates; (h) < &hstates[hugetlb_max_hstate]; (h)++)
104 struct hugepage_subpool *hugepage_new_subpool(struct hstate *h, long max_hpages,
106 void hugepage_put_subpool(struct hugepage_subpool *spool);
108 void reset_vma_resv_huge_pages(struct vm_area_struct *vma);
109 int hugetlb_sysctl_handler(struct ctl_table *, int, void *, size_t *, loff_t *);
110 int hugetlb_overcommit_handler(struct ctl_table *, int, void *, size_t *,
112 int hugetlb_treat_movable_handler(struct ctl_table *, int, void *, size_t *,
114 int hugetlb_mempolicy_sysctl_handler(struct ctl_table *, int, void *, size_t *,
117 int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *);
118 long follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *,
119 struct page **, struct vm_area_struct **,
120 unsigned long *, unsigned long *, long, unsigned int,
122 void unmap_hugepage_range(struct vm_area_struct *,
123 unsigned long, unsigned long, struct page *);
124 void __unmap_hugepage_range_final(struct mmu_gather *tlb,
125 struct vm_area_struct *vma,
126 unsigned long start, unsigned long end,
127 struct page *ref_page);
128 void __unmap_hugepage_range(struct mmu_gather *tlb, struct vm_area_struct *vma,
129 unsigned long start, unsigned long end,
130 struct page *ref_page);
131 void hugetlb_report_meminfo(struct seq_file *);
132 int hugetlb_report_node_meminfo(char *buf, int len, int nid);
133 void hugetlb_show_meminfo(void);
134 unsigned long hugetlb_total_pages(void);
135 vm_fault_t hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma,
136 unsigned long address, unsigned int flags);
137 int hugetlb_mcopy_atomic_pte(struct mm_struct *dst_mm, pte_t *dst_pte,
138 struct vm_area_struct *dst_vma,
139 unsigned long dst_addr,
140 unsigned long src_addr,
141 struct page **pagep);
142 bool hugetlb_reserve_pages(struct inode *inode, long from, long to,
143 struct vm_area_struct *vma,
144 vm_flags_t vm_flags);
145 long hugetlb_unreserve_pages(struct inode *inode, long start, long end,
147 bool isolate_huge_page(struct page *page, struct list_head *list);
148 void putback_active_hugepage(struct page *page);
149 void move_hugetlb_state(struct page *oldpage, struct page *newpage, int reason);
150 void free_huge_page(struct page *page);
151 void hugetlb_fix_reserve_counts(struct inode *inode);
152 extern struct mutex *hugetlb_fault_mutex_table;
153 u32 hugetlb_fault_mutex_hash(struct address_space *mapping, pgoff_t idx);
155 pte_t *huge_pmd_share(struct mm_struct *mm, struct vm_area_struct *vma,
156 unsigned long addr, pud_t *pud);
158 struct address_space *hugetlb_page_mapping_lock_write(struct page *hpage);
160 extern int sysctl_hugetlb_shm_group;
161 extern struct list_head huge_boot_pages;
165 pte_t *huge_pte_alloc(struct mm_struct *mm, struct vm_area_struct *vma,
166 unsigned long addr, unsigned long sz);
167 pte_t *huge_pte_offset(struct mm_struct *mm,
168 unsigned long addr, unsigned long sz);
169 int huge_pmd_unshare(struct mm_struct *mm, struct vm_area_struct *vma,
170 unsigned long *addr, pte_t *ptep);
171 void adjust_range_if_pmd_sharing_possible(struct vm_area_struct *vma,
172 unsigned long *start, unsigned long *end);
173 struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address,
175 struct page *follow_huge_pd(struct vm_area_struct *vma,
176 unsigned long address, hugepd_t hpd,
177 int flags, int pdshift);
178 struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address,
179 pmd_t *pmd, int flags);
180 struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address,
181 pud_t *pud, int flags);
182 struct page *follow_huge_pgd(struct mm_struct *mm, unsigned long address,
183 pgd_t *pgd, int flags);
185 int pmd_huge(pmd_t pmd);
186 int pud_huge(pud_t pud);
187 unsigned long hugetlb_change_protection(struct vm_area_struct *vma,
188 unsigned long address, unsigned long end, pgprot_t newprot);
190 bool is_hugetlb_entry_migration(pte_t pte);
192 #else /* !CONFIG_HUGETLB_PAGE */
194 static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma)
198 static inline unsigned long hugetlb_total_pages(void)
203 static inline struct address_space *hugetlb_page_mapping_lock_write(
209 static inline int huge_pmd_unshare(struct mm_struct *mm,
210 struct vm_area_struct *vma,
211 unsigned long *addr, pte_t *ptep)
216 static inline void adjust_range_if_pmd_sharing_possible(
217 struct vm_area_struct *vma,
218 unsigned long *start, unsigned long *end)
222 static inline long follow_hugetlb_page(struct mm_struct *mm,
223 struct vm_area_struct *vma, struct page **pages,
224 struct vm_area_struct **vmas, unsigned long *position,
225 unsigned long *nr_pages, long i, unsigned int flags,
232 static inline struct page *follow_huge_addr(struct mm_struct *mm,
233 unsigned long address, int write)
235 return ERR_PTR(-EINVAL);
238 static inline int copy_hugetlb_page_range(struct mm_struct *dst,
239 struct mm_struct *src, struct vm_area_struct *vma)
245 static inline void hugetlb_report_meminfo(struct seq_file *m)
249 static inline int hugetlb_report_node_meminfo(char *buf, int len, int nid)
254 static inline void hugetlb_show_meminfo(void)
258 static inline struct page *follow_huge_pd(struct vm_area_struct *vma,
259 unsigned long address, hugepd_t hpd, int flags,
265 static inline struct page *follow_huge_pmd(struct mm_struct *mm,
266 unsigned long address, pmd_t *pmd, int flags)
271 static inline struct page *follow_huge_pud(struct mm_struct *mm,
272 unsigned long address, pud_t *pud, int flags)
277 static inline struct page *follow_huge_pgd(struct mm_struct *mm,
278 unsigned long address, pgd_t *pgd, int flags)
283 static inline int prepare_hugepage_range(struct file *file,
284 unsigned long addr, unsigned long len)
289 static inline int pmd_huge(pmd_t pmd)
294 static inline int pud_huge(pud_t pud)
299 static inline int is_hugepage_only_range(struct mm_struct *mm,
300 unsigned long addr, unsigned long len)
305 static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb,
306 unsigned long addr, unsigned long end,
307 unsigned long floor, unsigned long ceiling)
312 static inline int hugetlb_mcopy_atomic_pte(struct mm_struct *dst_mm,
314 struct vm_area_struct *dst_vma,
315 unsigned long dst_addr,
316 unsigned long src_addr,
323 static inline pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr,
329 static inline bool isolate_huge_page(struct page *page, struct list_head *list)
334 static inline void putback_active_hugepage(struct page *page)
338 static inline void move_hugetlb_state(struct page *oldpage,
339 struct page *newpage, int reason)
343 static inline unsigned long hugetlb_change_protection(
344 struct vm_area_struct *vma, unsigned long address,
345 unsigned long end, pgprot_t newprot)
350 static inline void __unmap_hugepage_range_final(struct mmu_gather *tlb,
351 struct vm_area_struct *vma, unsigned long start,
352 unsigned long end, struct page *ref_page)
357 static inline void __unmap_hugepage_range(struct mmu_gather *tlb,
358 struct vm_area_struct *vma, unsigned long start,
359 unsigned long end, struct page *ref_page)
364 static inline vm_fault_t hugetlb_fault(struct mm_struct *mm,
365 struct vm_area_struct *vma, unsigned long address,
372 #endif /* !CONFIG_HUGETLB_PAGE */
374 * hugepages at page global directory. If arch support
375 * hugepages at pgd level, they need to define this.
378 #define pgd_huge(x) 0
381 #define p4d_huge(x) 0
385 static inline int pgd_write(pgd_t pgd)
392 #define HUGETLB_ANON_FILE "anon_hugepage"
396 * The file will be used as an shm file so shmfs accounting rules
399 HUGETLB_SHMFS_INODE = 1,
401 * The file is being created on the internal vfs mount and shmfs
402 * accounting rules do not apply
404 HUGETLB_ANONHUGE_INODE = 2,
407 #ifdef CONFIG_HUGETLBFS
408 struct hugetlbfs_sb_info {
409 long max_inodes; /* inodes allowed */
410 long free_inodes; /* inodes free */
411 spinlock_t stat_lock;
412 struct hstate *hstate;
413 struct hugepage_subpool *spool;
419 static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb)
421 return sb->s_fs_info;
424 struct hugetlbfs_inode_info {
425 struct shared_policy policy;
426 struct inode vfs_inode;
430 static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode)
432 return container_of(inode, struct hugetlbfs_inode_info, vfs_inode);
435 extern const struct file_operations hugetlbfs_file_operations;
436 extern const struct vm_operations_struct hugetlb_vm_ops;
437 struct file *hugetlb_file_setup(const char *name, size_t size, vm_flags_t acct,
438 struct user_struct **user, int creat_flags,
441 static inline bool is_file_hugepages(struct file *file)
443 if (file->f_op == &hugetlbfs_file_operations)
446 return is_file_shm_hugepages(file);
449 static inline struct hstate *hstate_inode(struct inode *i)
451 return HUGETLBFS_SB(i->i_sb)->hstate;
453 #else /* !CONFIG_HUGETLBFS */
455 #define is_file_hugepages(file) false
456 static inline struct file *
457 hugetlb_file_setup(const char *name, size_t size, vm_flags_t acctflag,
458 struct user_struct **user, int creat_flags,
461 return ERR_PTR(-ENOSYS);
464 static inline struct hstate *hstate_inode(struct inode *i)
468 #endif /* !CONFIG_HUGETLBFS */
470 #ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA
471 unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
472 unsigned long len, unsigned long pgoff,
473 unsigned long flags);
474 #endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */
477 * huegtlb page specific state flags. These flags are located in page.private
478 * of the hugetlb head page. Functions created via the below macros should be
479 * used to manipulate these flags.
481 * HPG_restore_reserve - Set when a hugetlb page consumes a reservation at
482 * allocation time. Cleared when page is fully instantiated. Free
483 * routine checks flag to restore a reservation on error paths.
484 * Synchronization: Examined or modified by code that knows it has
485 * the only reference to page. i.e. After allocation but before use
486 * or when the page is being freed.
487 * HPG_migratable - Set after a newly allocated page is added to the page
488 * cache and/or page tables. Indicates the page is a candidate for
490 * Synchronization: Initially set after new page allocation with no
491 * locking. When examined and modified during migration processing
492 * (isolate, migrate, putback) the hugetlb_lock is held.
493 * HPG_temporary - - Set on a page that is temporarily allocated from the buddy
494 * allocator. Typically used for migration target pages when no pages
495 * are available in the pool. The hugetlb free page path will
496 * immediately free pages with this flag set to the buddy allocator.
497 * Synchronization: Can be set after huge page allocation from buddy when
498 * code knows it has only reference. All other examinations and
499 * modifications require hugetlb_lock.
500 * HPG_freed - Set when page is on the free lists.
501 * Synchronization: hugetlb_lock held for examination and modification.
503 enum hugetlb_page_flags {
504 HPG_restore_reserve = 0,
512 * Macros to create test, set and clear function definitions for
513 * hugetlb specific page flags.
515 #ifdef CONFIG_HUGETLB_PAGE
516 #define TESTHPAGEFLAG(uname, flname) \
517 static inline int HPage##uname(struct page *page) \
518 { return test_bit(HPG_##flname, &(page->private)); }
520 #define SETHPAGEFLAG(uname, flname) \
521 static inline void SetHPage##uname(struct page *page) \
522 { set_bit(HPG_##flname, &(page->private)); }
524 #define CLEARHPAGEFLAG(uname, flname) \
525 static inline void ClearHPage##uname(struct page *page) \
526 { clear_bit(HPG_##flname, &(page->private)); }
528 #define TESTHPAGEFLAG(uname, flname) \
529 static inline int HPage##uname(struct page *page) \
532 #define SETHPAGEFLAG(uname, flname) \
533 static inline void SetHPage##uname(struct page *page) \
536 #define CLEARHPAGEFLAG(uname, flname) \
537 static inline void ClearHPage##uname(struct page *page) \
541 #define HPAGEFLAG(uname, flname) \
542 TESTHPAGEFLAG(uname, flname) \
543 SETHPAGEFLAG(uname, flname) \
544 CLEARHPAGEFLAG(uname, flname) \
547 * Create functions associated with hugetlb page flags
549 HPAGEFLAG(RestoreReserve, restore_reserve)
550 HPAGEFLAG(Migratable, migratable)
551 HPAGEFLAG(Temporary, temporary)
552 HPAGEFLAG(Freed, freed)
554 #ifdef CONFIG_HUGETLB_PAGE
556 #define HSTATE_NAME_LEN 32
557 /* Defines one hugetlb page size */
559 int next_nid_to_alloc;
560 int next_nid_to_free;
563 unsigned long max_huge_pages;
564 unsigned long nr_huge_pages;
565 unsigned long free_huge_pages;
566 unsigned long resv_huge_pages;
567 unsigned long surplus_huge_pages;
568 unsigned long nr_overcommit_huge_pages;
569 struct list_head hugepage_activelist;
570 struct list_head hugepage_freelists[MAX_NUMNODES];
571 unsigned int nr_huge_pages_node[MAX_NUMNODES];
572 unsigned int free_huge_pages_node[MAX_NUMNODES];
573 unsigned int surplus_huge_pages_node[MAX_NUMNODES];
574 #ifdef CONFIG_CGROUP_HUGETLB
575 /* cgroup control files */
576 struct cftype cgroup_files_dfl[7];
577 struct cftype cgroup_files_legacy[9];
579 char name[HSTATE_NAME_LEN];
582 struct huge_bootmem_page {
583 struct list_head list;
584 struct hstate *hstate;
587 struct page *alloc_huge_page(struct vm_area_struct *vma,
588 unsigned long addr, int avoid_reserve);
589 struct page *alloc_huge_page_nodemask(struct hstate *h, int preferred_nid,
590 nodemask_t *nmask, gfp_t gfp_mask);
591 struct page *alloc_huge_page_vma(struct hstate *h, struct vm_area_struct *vma,
592 unsigned long address);
593 int huge_add_to_page_cache(struct page *page, struct address_space *mapping,
597 int __init __alloc_bootmem_huge_page(struct hstate *h);
598 int __init alloc_bootmem_huge_page(struct hstate *h);
600 void __init hugetlb_add_hstate(unsigned order);
601 bool __init arch_hugetlb_valid_size(unsigned long size);
602 struct hstate *size_to_hstate(unsigned long size);
604 #ifndef HUGE_MAX_HSTATE
605 #define HUGE_MAX_HSTATE 1
608 extern struct hstate hstates[HUGE_MAX_HSTATE];
609 extern unsigned int default_hstate_idx;
611 #define default_hstate (hstates[default_hstate_idx])
614 * hugetlb page subpool pointer located in hpage[1].private
616 static inline struct hugepage_subpool *hugetlb_page_subpool(struct page *hpage)
618 return (struct hugepage_subpool *)(hpage+1)->private;
621 static inline void hugetlb_set_page_subpool(struct page *hpage,
622 struct hugepage_subpool *subpool)
624 set_page_private(hpage+1, (unsigned long)subpool);
627 static inline struct hstate *hstate_file(struct file *f)
629 return hstate_inode(file_inode(f));
632 static inline struct hstate *hstate_sizelog(int page_size_log)
635 return &default_hstate;
637 return size_to_hstate(1UL << page_size_log);
640 static inline struct hstate *hstate_vma(struct vm_area_struct *vma)
642 return hstate_file(vma->vm_file);
645 static inline unsigned long huge_page_size(struct hstate *h)
647 return (unsigned long)PAGE_SIZE << h->order;
650 extern unsigned long vma_kernel_pagesize(struct vm_area_struct *vma);
652 extern unsigned long vma_mmu_pagesize(struct vm_area_struct *vma);
654 static inline unsigned long huge_page_mask(struct hstate *h)
659 static inline unsigned int huge_page_order(struct hstate *h)
664 static inline unsigned huge_page_shift(struct hstate *h)
666 return h->order + PAGE_SHIFT;
669 static inline bool hstate_is_gigantic(struct hstate *h)
671 return huge_page_order(h) >= MAX_ORDER;
674 static inline unsigned int pages_per_huge_page(struct hstate *h)
676 return 1 << h->order;
679 static inline unsigned int blocks_per_huge_page(struct hstate *h)
681 return huge_page_size(h) / 512;
684 #include <asm/hugetlb.h>
686 #ifndef is_hugepage_only_range
687 static inline int is_hugepage_only_range(struct mm_struct *mm,
688 unsigned long addr, unsigned long len)
692 #define is_hugepage_only_range is_hugepage_only_range
695 #ifndef arch_clear_hugepage_flags
696 static inline void arch_clear_hugepage_flags(struct page *page) { }
697 #define arch_clear_hugepage_flags arch_clear_hugepage_flags
700 #ifndef arch_make_huge_pte
701 static inline pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma,
702 struct page *page, int writable)
708 static inline struct hstate *page_hstate(struct page *page)
710 VM_BUG_ON_PAGE(!PageHuge(page), page);
711 return size_to_hstate(page_size(page));
714 static inline unsigned hstate_index_to_shift(unsigned index)
716 return hstates[index].order + PAGE_SHIFT;
719 static inline int hstate_index(struct hstate *h)
724 pgoff_t __basepage_index(struct page *page);
726 /* Return page->index in PAGE_SIZE units */
727 static inline pgoff_t basepage_index(struct page *page)
729 if (!PageCompound(page))
732 return __basepage_index(page);
735 extern int dissolve_free_huge_page(struct page *page);
736 extern int dissolve_free_huge_pages(unsigned long start_pfn,
737 unsigned long end_pfn);
739 #ifdef CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION
740 #ifndef arch_hugetlb_migration_supported
741 static inline bool arch_hugetlb_migration_supported(struct hstate *h)
743 if ((huge_page_shift(h) == PMD_SHIFT) ||
744 (huge_page_shift(h) == PUD_SHIFT) ||
745 (huge_page_shift(h) == PGDIR_SHIFT))
752 static inline bool arch_hugetlb_migration_supported(struct hstate *h)
758 static inline bool hugepage_migration_supported(struct hstate *h)
760 return arch_hugetlb_migration_supported(h);
764 * Movability check is different as compared to migration check.
765 * It determines whether or not a huge page should be placed on
766 * movable zone or not. Movability of any huge page should be
767 * required only if huge page size is supported for migration.
768 * There wont be any reason for the huge page to be movable if
769 * it is not migratable to start with. Also the size of the huge
770 * page should be large enough to be placed under a movable zone
771 * and still feasible enough to be migratable. Just the presence
772 * in movable zone does not make the migration feasible.
774 * So even though large huge page sizes like the gigantic ones
775 * are migratable they should not be movable because its not
776 * feasible to migrate them from movable zone.
778 static inline bool hugepage_movable_supported(struct hstate *h)
780 if (!hugepage_migration_supported(h))
783 if (hstate_is_gigantic(h))
788 /* Movability of hugepages depends on migration support. */
789 static inline gfp_t htlb_alloc_mask(struct hstate *h)
791 if (hugepage_movable_supported(h))
792 return GFP_HIGHUSER_MOVABLE;
797 static inline gfp_t htlb_modify_alloc_mask(struct hstate *h, gfp_t gfp_mask)
799 gfp_t modified_mask = htlb_alloc_mask(h);
801 /* Some callers might want to enforce node */
802 modified_mask |= (gfp_mask & __GFP_THISNODE);
804 modified_mask |= (gfp_mask & __GFP_NOWARN);
806 return modified_mask;
809 static inline spinlock_t *huge_pte_lockptr(struct hstate *h,
810 struct mm_struct *mm, pte_t *pte)
812 if (huge_page_size(h) == PMD_SIZE)
813 return pmd_lockptr(mm, (pmd_t *) pte);
814 VM_BUG_ON(huge_page_size(h) == PAGE_SIZE);
815 return &mm->page_table_lock;
818 #ifndef hugepages_supported
820 * Some platform decide whether they support huge pages at boot
821 * time. Some of them, such as powerpc, set HPAGE_SHIFT to 0
822 * when there is no such support
824 #define hugepages_supported() (HPAGE_SHIFT != 0)
827 void hugetlb_report_usage(struct seq_file *m, struct mm_struct *mm);
829 static inline void hugetlb_count_add(long l, struct mm_struct *mm)
831 atomic_long_add(l, &mm->hugetlb_usage);
834 static inline void hugetlb_count_sub(long l, struct mm_struct *mm)
836 atomic_long_sub(l, &mm->hugetlb_usage);
839 #ifndef set_huge_swap_pte_at
840 static inline void set_huge_swap_pte_at(struct mm_struct *mm, unsigned long addr,
841 pte_t *ptep, pte_t pte, unsigned long sz)
843 set_huge_pte_at(mm, addr, ptep, pte);
847 #ifndef huge_ptep_modify_prot_start
848 #define huge_ptep_modify_prot_start huge_ptep_modify_prot_start
849 static inline pte_t huge_ptep_modify_prot_start(struct vm_area_struct *vma,
850 unsigned long addr, pte_t *ptep)
852 return huge_ptep_get_and_clear(vma->vm_mm, addr, ptep);
856 #ifndef huge_ptep_modify_prot_commit
857 #define huge_ptep_modify_prot_commit huge_ptep_modify_prot_commit
858 static inline void huge_ptep_modify_prot_commit(struct vm_area_struct *vma,
859 unsigned long addr, pte_t *ptep,
860 pte_t old_pte, pte_t pte)
862 set_huge_pte_at(vma->vm_mm, addr, ptep, pte);
866 #else /* CONFIG_HUGETLB_PAGE */
869 static inline struct page *alloc_huge_page(struct vm_area_struct *vma,
876 static inline struct page *
877 alloc_huge_page_nodemask(struct hstate *h, int preferred_nid,
878 nodemask_t *nmask, gfp_t gfp_mask)
883 static inline struct page *alloc_huge_page_vma(struct hstate *h,
884 struct vm_area_struct *vma,
885 unsigned long address)
890 static inline int __alloc_bootmem_huge_page(struct hstate *h)
895 static inline struct hstate *hstate_file(struct file *f)
900 static inline struct hstate *hstate_sizelog(int page_size_log)
905 static inline struct hstate *hstate_vma(struct vm_area_struct *vma)
910 static inline struct hstate *page_hstate(struct page *page)
915 static inline unsigned long huge_page_size(struct hstate *h)
920 static inline unsigned long huge_page_mask(struct hstate *h)
925 static inline unsigned long vma_kernel_pagesize(struct vm_area_struct *vma)
930 static inline unsigned long vma_mmu_pagesize(struct vm_area_struct *vma)
935 static inline unsigned int huge_page_order(struct hstate *h)
940 static inline unsigned int huge_page_shift(struct hstate *h)
945 static inline bool hstate_is_gigantic(struct hstate *h)
950 static inline unsigned int pages_per_huge_page(struct hstate *h)
955 static inline unsigned hstate_index_to_shift(unsigned index)
960 static inline int hstate_index(struct hstate *h)
965 static inline pgoff_t basepage_index(struct page *page)
970 static inline int dissolve_free_huge_page(struct page *page)
975 static inline int dissolve_free_huge_pages(unsigned long start_pfn,
976 unsigned long end_pfn)
981 static inline bool hugepage_migration_supported(struct hstate *h)
986 static inline bool hugepage_movable_supported(struct hstate *h)
991 static inline gfp_t htlb_alloc_mask(struct hstate *h)
996 static inline gfp_t htlb_modify_alloc_mask(struct hstate *h, gfp_t gfp_mask)
1001 static inline spinlock_t *huge_pte_lockptr(struct hstate *h,
1002 struct mm_struct *mm, pte_t *pte)
1004 return &mm->page_table_lock;
1007 static inline void hugetlb_report_usage(struct seq_file *f, struct mm_struct *m)
1011 static inline void hugetlb_count_sub(long l, struct mm_struct *mm)
1015 static inline void set_huge_swap_pte_at(struct mm_struct *mm, unsigned long addr,
1016 pte_t *ptep, pte_t pte, unsigned long sz)
1019 #endif /* CONFIG_HUGETLB_PAGE */
1021 static inline spinlock_t *huge_pte_lock(struct hstate *h,
1022 struct mm_struct *mm, pte_t *pte)
1026 ptl = huge_pte_lockptr(h, mm, pte);
1031 #if defined(CONFIG_HUGETLB_PAGE) && defined(CONFIG_CMA)
1032 extern void __init hugetlb_cma_reserve(int order);
1033 extern void __init hugetlb_cma_check(void);
1035 static inline __init void hugetlb_cma_reserve(int order)
1038 static inline __init void hugetlb_cma_check(void)
1043 bool want_pmd_share(struct vm_area_struct *vma, unsigned long addr);
1045 #endif /* _LINUX_HUGETLB_H */