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- /* SPDX-License-Identifier: GPL-2.0 */
- #ifndef _LINUX_HUGETLB_H
- #define _LINUX_HUGETLB_H
- #include <linux/mm_types.h>
- #include <linux/mmdebug.h>
- #include <linux/fs.h>
- #include <linux/hugetlb_inline.h>
- #include <linux/cgroup.h>
- #include <linux/list.h>
- #include <linux/kref.h>
- #include <linux/pgtable.h>
- #include <linux/gfp.h>
- #include <linux/userfaultfd_k.h>
- struct ctl_table;
- struct user_struct;
- struct mmu_gather;
- #ifndef is_hugepd
- typedef struct { unsigned long pd; } hugepd_t;
- #define is_hugepd(hugepd) (0)
- #define __hugepd(x) ((hugepd_t) { (x) })
- #endif
- #ifdef CONFIG_HUGETLB_PAGE
- #include <linux/mempolicy.h>
- #include <linux/shm.h>
- #include <asm/tlbflush.h>
- struct hugepage_subpool {
- spinlock_t lock;
- long count;
- long max_hpages; /* Maximum huge pages or -1 if no maximum. */
- long used_hpages; /* Used count against maximum, includes */
- /* both alloced and reserved pages. */
- struct hstate *hstate;
- long min_hpages; /* Minimum huge pages or -1 if no minimum. */
- long rsv_hpages; /* Pages reserved against global pool to */
- /* sasitfy minimum size. */
- };
- struct resv_map {
- struct kref refs;
- spinlock_t lock;
- struct list_head regions;
- long adds_in_progress;
- struct list_head region_cache;
- long region_cache_count;
- #ifdef CONFIG_CGROUP_HUGETLB
- /*
- * On private mappings, the counter to uncharge reservations is stored
- * here. If these fields are 0, then either the mapping is shared, or
- * cgroup accounting is disabled for this resv_map.
- */
- struct page_counter *reservation_counter;
- unsigned long pages_per_hpage;
- struct cgroup_subsys_state *css;
- #endif
- };
- /*
- * Region tracking -- allows tracking of reservations and instantiated pages
- * across the pages in a mapping.
- *
- * The region data structures are embedded into a resv_map and protected
- * by a resv_map's lock. The set of regions within the resv_map represent
- * reservations for huge pages, or huge pages that have already been
- * instantiated within the map. The from and to elements are huge page
- * indicies into the associated mapping. from indicates the starting index
- * of the region. to represents the first index past the end of the region.
- *
- * For example, a file region structure with from == 0 and to == 4 represents
- * four huge pages in a mapping. It is important to note that the to element
- * represents the first element past the end of the region. This is used in
- * arithmetic as 4(to) - 0(from) = 4 huge pages in the region.
- *
- * Interval notation of the form [from, to) will be used to indicate that
- * the endpoint from is inclusive and to is exclusive.
- */
- struct file_region {
- struct list_head link;
- long from;
- long to;
- #ifdef CONFIG_CGROUP_HUGETLB
- /*
- * On shared mappings, each reserved region appears as a struct
- * file_region in resv_map. These fields hold the info needed to
- * uncharge each reservation.
- */
- struct page_counter *reservation_counter;
- struct cgroup_subsys_state *css;
- #endif
- };
- extern struct resv_map *resv_map_alloc(void);
- void resv_map_release(struct kref *ref);
- extern spinlock_t hugetlb_lock;
- extern int hugetlb_max_hstate __read_mostly;
- #define for_each_hstate(h) \
- for ((h) = hstates; (h) < &hstates[hugetlb_max_hstate]; (h)++)
- struct hugepage_subpool *hugepage_new_subpool(struct hstate *h, long max_hpages,
- long min_hpages);
- void hugepage_put_subpool(struct hugepage_subpool *spool);
- void reset_vma_resv_huge_pages(struct vm_area_struct *vma);
- int hugetlb_sysctl_handler(struct ctl_table *, int, void *, size_t *, loff_t *);
- int hugetlb_overcommit_handler(struct ctl_table *, int, void *, size_t *,
- loff_t *);
- int hugetlb_treat_movable_handler(struct ctl_table *, int, void *, size_t *,
- loff_t *);
- int hugetlb_mempolicy_sysctl_handler(struct ctl_table *, int, void *, size_t *,
- loff_t *);
- int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *);
- long follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *,
- struct page **, struct vm_area_struct **,
- unsigned long *, unsigned long *, long, unsigned int,
- int *);
- void unmap_hugepage_range(struct vm_area_struct *,
- unsigned long, unsigned long, struct page *);
- void __unmap_hugepage_range_final(struct mmu_gather *tlb,
- struct vm_area_struct *vma,
- unsigned long start, unsigned long end,
- struct page *ref_page);
- void __unmap_hugepage_range(struct mmu_gather *tlb, struct vm_area_struct *vma,
- unsigned long start, unsigned long end,
- struct page *ref_page);
- void hugetlb_report_meminfo(struct seq_file *);
- int hugetlb_report_node_meminfo(char *buf, int len, int nid);
- void hugetlb_show_meminfo(void);
- unsigned long hugetlb_total_pages(void);
- vm_fault_t hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma,
- unsigned long address, unsigned int flags);
- #ifdef CONFIG_USERFAULTFD
- int hugetlb_mcopy_atomic_pte(struct mm_struct *dst_mm, pte_t *dst_pte,
- struct vm_area_struct *dst_vma,
- unsigned long dst_addr,
- unsigned long src_addr,
- enum mcopy_atomic_mode mode,
- struct page **pagep);
- #endif /* CONFIG_USERFAULTFD */
- int hugetlb_reserve_pages(struct inode *inode, long from, long to,
- struct vm_area_struct *vma,
- vm_flags_t vm_flags);
- long hugetlb_unreserve_pages(struct inode *inode, long start, long end,
- long freed);
- bool isolate_huge_page(struct page *page, struct list_head *list);
- void putback_active_hugepage(struct page *page);
- void move_hugetlb_state(struct page *oldpage, struct page *newpage, int reason);
- void free_huge_page(struct page *page);
- void hugetlb_fix_reserve_counts(struct inode *inode);
- extern struct mutex *hugetlb_fault_mutex_table;
- u32 hugetlb_fault_mutex_hash(struct address_space *mapping, pgoff_t idx);
- pte_t *huge_pmd_share(struct mm_struct *mm, struct vm_area_struct *vma,
- unsigned long addr, pud_t *pud);
- struct address_space *hugetlb_page_mapping_lock_write(struct page *hpage);
- extern int sysctl_hugetlb_shm_group;
- extern struct list_head huge_boot_pages;
- /* arch callbacks */
- pte_t *huge_pte_alloc(struct mm_struct *mm, struct vm_area_struct *vma,
- unsigned long addr, unsigned long sz);
- pte_t *huge_pte_offset(struct mm_struct *mm,
- unsigned long addr, unsigned long sz);
- int huge_pmd_unshare(struct mm_struct *mm, struct vm_area_struct *vma,
- unsigned long *addr, pte_t *ptep);
- void adjust_range_if_pmd_sharing_possible(struct vm_area_struct *vma,
- unsigned long *start, unsigned long *end);
- struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address,
- int write);
- struct page *follow_huge_pd(struct vm_area_struct *vma,
- unsigned long address, hugepd_t hpd,
- int flags, int pdshift);
- struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address,
- pmd_t *pmd, int flags);
- struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address,
- pud_t *pud, int flags);
- struct page *follow_huge_pgd(struct mm_struct *mm, unsigned long address,
- pgd_t *pgd, int flags);
- int pmd_huge(pmd_t pmd);
- int pud_huge(pud_t pud);
- unsigned long hugetlb_change_protection(struct vm_area_struct *vma,
- unsigned long address, unsigned long end, pgprot_t newprot);
- bool is_hugetlb_entry_migration(pte_t pte);
- void hugetlb_unshare_all_pmds(struct vm_area_struct *vma);
- #else /* !CONFIG_HUGETLB_PAGE */
- static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma)
- {
- }
- static inline unsigned long hugetlb_total_pages(void)
- {
- return 0;
- }
- static inline struct address_space *hugetlb_page_mapping_lock_write(
- struct page *hpage)
- {
- return NULL;
- }
- static inline int huge_pmd_unshare(struct mm_struct *mm,
- struct vm_area_struct *vma,
- unsigned long *addr, pte_t *ptep)
- {
- return 0;
- }
- static inline void adjust_range_if_pmd_sharing_possible(
- struct vm_area_struct *vma,
- unsigned long *start, unsigned long *end)
- {
- }
- static inline long follow_hugetlb_page(struct mm_struct *mm,
- struct vm_area_struct *vma, struct page **pages,
- struct vm_area_struct **vmas, unsigned long *position,
- unsigned long *nr_pages, long i, unsigned int flags,
- int *nonblocking)
- {
- BUG();
- return 0;
- }
- static inline struct page *follow_huge_addr(struct mm_struct *mm,
- unsigned long address, int write)
- {
- return ERR_PTR(-EINVAL);
- }
- static inline int copy_hugetlb_page_range(struct mm_struct *dst,
- struct mm_struct *src, struct vm_area_struct *vma)
- {
- BUG();
- return 0;
- }
- static inline void hugetlb_report_meminfo(struct seq_file *m)
- {
- }
- static inline int hugetlb_report_node_meminfo(char *buf, int len, int nid)
- {
- return 0;
- }
- static inline void hugetlb_show_meminfo(void)
- {
- }
- static inline struct page *follow_huge_pd(struct vm_area_struct *vma,
- unsigned long address, hugepd_t hpd, int flags,
- int pdshift)
- {
- return NULL;
- }
- static inline struct page *follow_huge_pmd(struct mm_struct *mm,
- unsigned long address, pmd_t *pmd, int flags)
- {
- return NULL;
- }
- static inline struct page *follow_huge_pud(struct mm_struct *mm,
- unsigned long address, pud_t *pud, int flags)
- {
- return NULL;
- }
- static inline struct page *follow_huge_pgd(struct mm_struct *mm,
- unsigned long address, pgd_t *pgd, int flags)
- {
- return NULL;
- }
- static inline int prepare_hugepage_range(struct file *file,
- unsigned long addr, unsigned long len)
- {
- return -EINVAL;
- }
- static inline int pmd_huge(pmd_t pmd)
- {
- return 0;
- }
- static inline int pud_huge(pud_t pud)
- {
- return 0;
- }
- static inline int is_hugepage_only_range(struct mm_struct *mm,
- unsigned long addr, unsigned long len)
- {
- return 0;
- }
- static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb,
- unsigned long addr, unsigned long end,
- unsigned long floor, unsigned long ceiling)
- {
- BUG();
- }
- #ifdef CONFIG_USERFAULTFD
- static inline int hugetlb_mcopy_atomic_pte(struct mm_struct *dst_mm,
- pte_t *dst_pte,
- struct vm_area_struct *dst_vma,
- unsigned long dst_addr,
- unsigned long src_addr,
- enum mcopy_atomic_mode mode,
- struct page **pagep)
- {
- BUG();
- return 0;
- }
- #endif /* CONFIG_USERFAULTFD */
- static inline pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr,
- unsigned long sz)
- {
- return NULL;
- }
- static inline bool isolate_huge_page(struct page *page, struct list_head *list)
- {
- return false;
- }
- static inline void putback_active_hugepage(struct page *page)
- {
- }
- static inline void move_hugetlb_state(struct page *oldpage,
- struct page *newpage, int reason)
- {
- }
- static inline unsigned long hugetlb_change_protection(
- struct vm_area_struct *vma, unsigned long address,
- unsigned long end, pgprot_t newprot)
- {
- return 0;
- }
- static inline void __unmap_hugepage_range_final(struct mmu_gather *tlb,
- struct vm_area_struct *vma, unsigned long start,
- unsigned long end, struct page *ref_page)
- {
- BUG();
- }
- static inline void __unmap_hugepage_range(struct mmu_gather *tlb,
- struct vm_area_struct *vma, unsigned long start,
- unsigned long end, struct page *ref_page)
- {
- BUG();
- }
- static inline vm_fault_t hugetlb_fault(struct mm_struct *mm,
- struct vm_area_struct *vma, unsigned long address,
- unsigned int flags)
- {
- BUG();
- return 0;
- }
- static inline void hugetlb_unshare_all_pmds(struct vm_area_struct *vma) { }
- #endif /* !CONFIG_HUGETLB_PAGE */
- /*
- * hugepages at page global directory. If arch support
- * hugepages at pgd level, they need to define this.
- */
- #ifndef pgd_huge
- #define pgd_huge(x) 0
- #endif
- #ifndef p4d_huge
- #define p4d_huge(x) 0
- #endif
- #ifndef pgd_write
- static inline int pgd_write(pgd_t pgd)
- {
- BUG();
- return 0;
- }
- #endif
- #define HUGETLB_ANON_FILE "anon_hugepage"
- enum {
- /*
- * The file will be used as an shm file so shmfs accounting rules
- * apply
- */
- HUGETLB_SHMFS_INODE = 1,
- /*
- * The file is being created on the internal vfs mount and shmfs
- * accounting rules do not apply
- */
- HUGETLB_ANONHUGE_INODE = 2,
- };
- #ifdef CONFIG_HUGETLBFS
- struct hugetlbfs_sb_info {
- long max_inodes; /* inodes allowed */
- long free_inodes; /* inodes free */
- spinlock_t stat_lock;
- struct hstate *hstate;
- struct hugepage_subpool *spool;
- kuid_t uid;
- kgid_t gid;
- umode_t mode;
- };
- static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb)
- {
- return sb->s_fs_info;
- }
- struct hugetlbfs_inode_info {
- struct shared_policy policy;
- struct inode vfs_inode;
- unsigned int seals;
- };
- static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode)
- {
- return container_of(inode, struct hugetlbfs_inode_info, vfs_inode);
- }
- extern const struct file_operations hugetlbfs_file_operations;
- extern const struct vm_operations_struct hugetlb_vm_ops;
- struct file *hugetlb_file_setup(const char *name, size_t size, vm_flags_t acct,
- struct user_struct **user, int creat_flags,
- int page_size_log);
- static inline bool is_file_hugepages(struct file *file)
- {
- if (file->f_op == &hugetlbfs_file_operations)
- return true;
- return is_file_shm_hugepages(file);
- }
- static inline struct hstate *hstate_inode(struct inode *i)
- {
- return HUGETLBFS_SB(i->i_sb)->hstate;
- }
- #else /* !CONFIG_HUGETLBFS */
- #define is_file_hugepages(file) false
- static inline struct file *
- hugetlb_file_setup(const char *name, size_t size, vm_flags_t acctflag,
- struct user_struct **user, int creat_flags,
- int page_size_log)
- {
- return ERR_PTR(-ENOSYS);
- }
- static inline struct hstate *hstate_inode(struct inode *i)
- {
- return NULL;
- }
- #endif /* !CONFIG_HUGETLBFS */
- #ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA
- unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
- unsigned long len, unsigned long pgoff,
- unsigned long flags);
- #endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */
- #ifdef CONFIG_HUGETLB_PAGE
- #define HSTATE_NAME_LEN 32
- /* Defines one hugetlb page size */
- struct hstate {
- int next_nid_to_alloc;
- int next_nid_to_free;
- unsigned int order;
- unsigned long mask;
- unsigned long max_huge_pages;
- unsigned long nr_huge_pages;
- unsigned long free_huge_pages;
- unsigned long resv_huge_pages;
- unsigned long surplus_huge_pages;
- unsigned long nr_overcommit_huge_pages;
- struct list_head hugepage_activelist;
- struct list_head hugepage_freelists[MAX_NUMNODES];
- unsigned int nr_huge_pages_node[MAX_NUMNODES];
- unsigned int free_huge_pages_node[MAX_NUMNODES];
- unsigned int surplus_huge_pages_node[MAX_NUMNODES];
- #ifdef CONFIG_CGROUP_HUGETLB
- /* cgroup control files */
- struct cftype cgroup_files_dfl[7];
- struct cftype cgroup_files_legacy[9];
- #endif
- char name[HSTATE_NAME_LEN];
- };
- struct huge_bootmem_page {
- struct list_head list;
- struct hstate *hstate;
- };
- struct page *alloc_huge_page(struct vm_area_struct *vma,
- unsigned long addr, int avoid_reserve);
- struct page *alloc_huge_page_nodemask(struct hstate *h, int preferred_nid,
- nodemask_t *nmask, gfp_t gfp_mask);
- struct page *alloc_huge_page_vma(struct hstate *h, struct vm_area_struct *vma,
- unsigned long address);
- int huge_add_to_page_cache(struct page *page, struct address_space *mapping,
- pgoff_t idx);
- /* arch callback */
- int __init __alloc_bootmem_huge_page(struct hstate *h);
- int __init alloc_bootmem_huge_page(struct hstate *h);
- void __init hugetlb_add_hstate(unsigned order);
- bool __init arch_hugetlb_valid_size(unsigned long size);
- struct hstate *size_to_hstate(unsigned long size);
- #ifndef HUGE_MAX_HSTATE
- #define HUGE_MAX_HSTATE 1
- #endif
- extern struct hstate hstates[HUGE_MAX_HSTATE];
- extern unsigned int default_hstate_idx;
- #define default_hstate (hstates[default_hstate_idx])
- static inline struct hstate *hstate_file(struct file *f)
- {
- return hstate_inode(file_inode(f));
- }
- static inline struct hstate *hstate_sizelog(int page_size_log)
- {
- if (!page_size_log)
- return &default_hstate;
- return size_to_hstate(1UL << page_size_log);
- }
- static inline struct hstate *hstate_vma(struct vm_area_struct *vma)
- {
- return hstate_file(vma->vm_file);
- }
- static inline unsigned long huge_page_size(struct hstate *h)
- {
- return (unsigned long)PAGE_SIZE << h->order;
- }
- extern unsigned long vma_kernel_pagesize(struct vm_area_struct *vma);
- extern unsigned long vma_mmu_pagesize(struct vm_area_struct *vma);
- static inline unsigned long huge_page_mask(struct hstate *h)
- {
- return h->mask;
- }
- static inline unsigned int huge_page_order(struct hstate *h)
- {
- return h->order;
- }
- static inline unsigned huge_page_shift(struct hstate *h)
- {
- return h->order + PAGE_SHIFT;
- }
- static inline bool hstate_is_gigantic(struct hstate *h)
- {
- return huge_page_order(h) >= MAX_ORDER;
- }
- static inline unsigned int pages_per_huge_page(struct hstate *h)
- {
- return 1 << h->order;
- }
- static inline unsigned int blocks_per_huge_page(struct hstate *h)
- {
- return huge_page_size(h) / 512;
- }
- #include <asm/hugetlb.h>
- #ifndef is_hugepage_only_range
- static inline int is_hugepage_only_range(struct mm_struct *mm,
- unsigned long addr, unsigned long len)
- {
- return 0;
- }
- #define is_hugepage_only_range is_hugepage_only_range
- #endif
- #ifndef arch_clear_hugepage_flags
- static inline void arch_clear_hugepage_flags(struct page *page) { }
- #define arch_clear_hugepage_flags arch_clear_hugepage_flags
- #endif
- #ifndef arch_make_huge_pte
- static inline pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma,
- struct page *page, int writable)
- {
- return entry;
- }
- #endif
- static inline struct hstate *page_hstate(struct page *page)
- {
- VM_BUG_ON_PAGE(!PageHuge(page), page);
- return size_to_hstate(page_size(page));
- }
- static inline unsigned hstate_index_to_shift(unsigned index)
- {
- return hstates[index].order + PAGE_SHIFT;
- }
- static inline int hstate_index(struct hstate *h)
- {
- return h - hstates;
- }
- extern int dissolve_free_huge_page(struct page *page);
- extern int dissolve_free_huge_pages(unsigned long start_pfn,
- unsigned long end_pfn);
- #ifdef CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION
- #ifndef arch_hugetlb_migration_supported
- static inline bool arch_hugetlb_migration_supported(struct hstate *h)
- {
- if ((huge_page_shift(h) == PMD_SHIFT) ||
- (huge_page_shift(h) == PUD_SHIFT) ||
- (huge_page_shift(h) == PGDIR_SHIFT))
- return true;
- else
- return false;
- }
- #endif
- #else
- static inline bool arch_hugetlb_migration_supported(struct hstate *h)
- {
- return false;
- }
- #endif
- static inline bool hugepage_migration_supported(struct hstate *h)
- {
- return arch_hugetlb_migration_supported(h);
- }
- /*
- * Movability check is different as compared to migration check.
- * It determines whether or not a huge page should be placed on
- * movable zone or not. Movability of any huge page should be
- * required only if huge page size is supported for migration.
- * There wont be any reason for the huge page to be movable if
- * it is not migratable to start with. Also the size of the huge
- * page should be large enough to be placed under a movable zone
- * and still feasible enough to be migratable. Just the presence
- * in movable zone does not make the migration feasible.
- *
- * So even though large huge page sizes like the gigantic ones
- * are migratable they should not be movable because its not
- * feasible to migrate them from movable zone.
- */
- static inline bool hugepage_movable_supported(struct hstate *h)
- {
- if (!hugepage_migration_supported(h))
- return false;
- if (hstate_is_gigantic(h))
- return false;
- return true;
- }
- /* Movability of hugepages depends on migration support. */
- static inline gfp_t htlb_alloc_mask(struct hstate *h)
- {
- if (hugepage_movable_supported(h))
- return GFP_HIGHUSER_MOVABLE;
- else
- return GFP_HIGHUSER;
- }
- static inline gfp_t htlb_modify_alloc_mask(struct hstate *h, gfp_t gfp_mask)
- {
- gfp_t modified_mask = htlb_alloc_mask(h);
- /* Some callers might want to enforce node */
- modified_mask |= (gfp_mask & __GFP_THISNODE);
- modified_mask |= (gfp_mask & __GFP_NOWARN);
- return modified_mask;
- }
- static inline spinlock_t *huge_pte_lockptr(struct hstate *h,
- struct mm_struct *mm, pte_t *pte)
- {
- if (huge_page_size(h) == PMD_SIZE)
- return pmd_lockptr(mm, (pmd_t *) pte);
- VM_BUG_ON(huge_page_size(h) == PAGE_SIZE);
- return &mm->page_table_lock;
- }
- #ifndef hugepages_supported
- /*
- * Some platform decide whether they support huge pages at boot
- * time. Some of them, such as powerpc, set HPAGE_SHIFT to 0
- * when there is no such support
- */
- #define hugepages_supported() (HPAGE_SHIFT != 0)
- #endif
- void hugetlb_report_usage(struct seq_file *m, struct mm_struct *mm);
- static inline void hugetlb_count_init(struct mm_struct *mm)
- {
- atomic_long_set(&mm->hugetlb_usage, 0);
- }
- static inline void hugetlb_count_add(long l, struct mm_struct *mm)
- {
- atomic_long_add(l, &mm->hugetlb_usage);
- }
- static inline void hugetlb_count_sub(long l, struct mm_struct *mm)
- {
- atomic_long_sub(l, &mm->hugetlb_usage);
- }
- #ifndef set_huge_swap_pte_at
- static inline void set_huge_swap_pte_at(struct mm_struct *mm, unsigned long addr,
- pte_t *ptep, pte_t pte, unsigned long sz)
- {
- set_huge_pte_at(mm, addr, ptep, pte);
- }
- #endif
- #ifndef huge_ptep_modify_prot_start
- #define huge_ptep_modify_prot_start huge_ptep_modify_prot_start
- static inline pte_t huge_ptep_modify_prot_start(struct vm_area_struct *vma,
- unsigned long addr, pte_t *ptep)
- {
- return huge_ptep_get_and_clear(vma->vm_mm, addr, ptep);
- }
- #endif
- #ifndef huge_ptep_modify_prot_commit
- #define huge_ptep_modify_prot_commit huge_ptep_modify_prot_commit
- static inline void huge_ptep_modify_prot_commit(struct vm_area_struct *vma,
- unsigned long addr, pte_t *ptep,
- pte_t old_pte, pte_t pte)
- {
- set_huge_pte_at(vma->vm_mm, addr, ptep, pte);
- }
- #endif
- void set_page_huge_active(struct page *page);
- #else /* CONFIG_HUGETLB_PAGE */
- struct hstate {};
- static inline struct page *alloc_huge_page(struct vm_area_struct *vma,
- unsigned long addr,
- int avoid_reserve)
- {
- return NULL;
- }
- static inline struct page *
- alloc_huge_page_nodemask(struct hstate *h, int preferred_nid,
- nodemask_t *nmask, gfp_t gfp_mask)
- {
- return NULL;
- }
- static inline struct page *alloc_huge_page_vma(struct hstate *h,
- struct vm_area_struct *vma,
- unsigned long address)
- {
- return NULL;
- }
- static inline int __alloc_bootmem_huge_page(struct hstate *h)
- {
- return 0;
- }
- static inline struct hstate *hstate_file(struct file *f)
- {
- return NULL;
- }
- static inline struct hstate *hstate_sizelog(int page_size_log)
- {
- return NULL;
- }
- static inline struct hstate *hstate_vma(struct vm_area_struct *vma)
- {
- return NULL;
- }
- static inline struct hstate *page_hstate(struct page *page)
- {
- return NULL;
- }
- static inline unsigned long huge_page_size(struct hstate *h)
- {
- return PAGE_SIZE;
- }
- static inline unsigned long huge_page_mask(struct hstate *h)
- {
- return PAGE_MASK;
- }
- static inline unsigned long vma_kernel_pagesize(struct vm_area_struct *vma)
- {
- return PAGE_SIZE;
- }
- static inline unsigned long vma_mmu_pagesize(struct vm_area_struct *vma)
- {
- return PAGE_SIZE;
- }
- static inline unsigned int huge_page_order(struct hstate *h)
- {
- return 0;
- }
- static inline unsigned int huge_page_shift(struct hstate *h)
- {
- return PAGE_SHIFT;
- }
- static inline bool hstate_is_gigantic(struct hstate *h)
- {
- return false;
- }
- static inline unsigned int pages_per_huge_page(struct hstate *h)
- {
- return 1;
- }
- static inline unsigned hstate_index_to_shift(unsigned index)
- {
- return 0;
- }
- static inline int hstate_index(struct hstate *h)
- {
- return 0;
- }
- static inline int dissolve_free_huge_page(struct page *page)
- {
- return 0;
- }
- static inline int dissolve_free_huge_pages(unsigned long start_pfn,
- unsigned long end_pfn)
- {
- return 0;
- }
- static inline bool hugepage_migration_supported(struct hstate *h)
- {
- return false;
- }
- static inline bool hugepage_movable_supported(struct hstate *h)
- {
- return false;
- }
- static inline gfp_t htlb_alloc_mask(struct hstate *h)
- {
- return 0;
- }
- static inline gfp_t htlb_modify_alloc_mask(struct hstate *h, gfp_t gfp_mask)
- {
- return 0;
- }
- static inline spinlock_t *huge_pte_lockptr(struct hstate *h,
- struct mm_struct *mm, pte_t *pte)
- {
- return &mm->page_table_lock;
- }
- static inline void hugetlb_count_init(struct mm_struct *mm)
- {
- }
- static inline void hugetlb_report_usage(struct seq_file *f, struct mm_struct *m)
- {
- }
- static inline void hugetlb_count_sub(long l, struct mm_struct *mm)
- {
- }
- static inline void set_huge_swap_pte_at(struct mm_struct *mm, unsigned long addr,
- pte_t *ptep, pte_t pte, unsigned long sz)
- {
- }
- #endif /* CONFIG_HUGETLB_PAGE */
- static inline spinlock_t *huge_pte_lock(struct hstate *h,
- struct mm_struct *mm, pte_t *pte)
- {
- spinlock_t *ptl;
- ptl = huge_pte_lockptr(h, mm, pte);
- spin_lock(ptl);
- return ptl;
- }
- #if defined(CONFIG_HUGETLB_PAGE) && defined(CONFIG_CMA)
- extern void __init hugetlb_cma_reserve(int order);
- extern void __init hugetlb_cma_check(void);
- #else
- static inline __init void hugetlb_cma_reserve(int order)
- {
- }
- static inline __init void hugetlb_cma_check(void)
- {
- }
- #endif
- bool want_pmd_share(struct vm_area_struct *vma, unsigned long addr);
- #ifndef __HAVE_ARCH_FLUSH_HUGETLB_TLB_RANGE
- /*
- * ARCHes with special requirements for evicting HUGETLB backing TLB entries can
- * implement this.
- */
- #define flush_hugetlb_tlb_range(vma, addr, end) flush_tlb_range(vma, addr, end)
- #endif
- #endif /* _LINUX_HUGETLB_H */
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