Green shading in the line number column means the source is part of the translation unit, red means it is conditionally excluded. Highlighted line numbers link to the translation unit page. Highlighted macros link to the macro page.
1: #ifndef _LINUX_HUGE_MM_H 2: #define _LINUX_HUGE_MM_H 3: 4: extern int do_huge_pmd_anonymous_page(struct mm_struct *mm, 5: struct vm_area_struct *vma, 6: unsigned long address, pmd_t *pmd, 7: unsigned int flags); 8: extern int copy_huge_pmd(struct mm_struct *dst_mm, struct mm_struct *src_mm, 9: pmd_t *dst_pmd, pmd_t *src_pmd, unsigned long addr, 10: struct vm_area_struct *vma); 11: extern void huge_pmd_set_accessed(struct mm_struct *mm, 12: struct vm_area_struct *vma, 13: unsigned long address, pmd_t *pmd, 14: pmd_t orig_pmd, int dirty); 15: extern int do_huge_pmd_wp_page(struct mm_struct *mm, struct vm_area_struct *vma, 16: unsigned long address, pmd_t *pmd, 17: pmd_t orig_pmd); 18: extern struct page *follow_trans_huge_pmd(struct vm_area_struct *vma, 19: unsigned long addr, 20: pmd_t *pmd, 21: unsigned int flags); 22: extern int zap_huge_pmd(struct mmu_gather *tlb, 23: struct vm_area_struct *vma, 24: pmd_t *pmd, unsigned long addr); 25: extern int mincore_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, 26: unsigned long addr, unsigned long end, 27: unsigned char *vec); 28: extern int move_huge_pmd(struct vm_area_struct *vma, 29: struct vm_area_struct *new_vma, 30: unsigned long old_addr, 31: unsigned long new_addr, unsigned long old_end, 32: pmd_t *old_pmd, pmd_t *new_pmd); 33: extern int change_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, 34: unsigned long addr, pgprot_t newprot, 35: int prot_numa); 36: 37: enum transparent_hugepage_flag { 38: TRANSPARENT_HUGEPAGE_FLAG, 39: TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG, 40: TRANSPARENT_HUGEPAGE_DEFRAG_FLAG, 41: TRANSPARENT_HUGEPAGE_DEFRAG_REQ_MADV_FLAG, 42: TRANSPARENT_HUGEPAGE_DEFRAG_KHUGEPAGED_FLAG, 43: TRANSPARENT_HUGEPAGE_USE_ZERO_PAGE_FLAG, 44: #ifdef CONFIG_DEBUG_VM 45: TRANSPARENT_HUGEPAGE_DEBUG_COW_FLAG, 46: #endif 47: }; 48: 49: enum page_check_address_pmd_flag { 50: PAGE_CHECK_ADDRESS_PMD_FLAG, 51: PAGE_CHECK_ADDRESS_PMD_NOTSPLITTING_FLAG, 52: PAGE_CHECK_ADDRESS_PMD_SPLITTING_FLAG, 53: }; 54: extern pmd_t *page_check_address_pmd(struct page *page, 55: struct mm_struct *mm, 56: unsigned long address, 57: enum page_check_address_pmd_flag flag, 58: spinlock_t **ptl); 59: 60: #define HPAGE_PMD_ORDER (HPAGE_PMD_SHIFT-PAGE_SHIFT) 61: #define HPAGE_PMD_NR (1<<HPAGE_PMD_ORDER) 62: 63: #ifdef CONFIG_TRANSPARENT_HUGEPAGE 64: #define HPAGE_PMD_SHIFT PMD_SHIFT 65: #define HPAGE_PMD_SIZE ((1UL) << HPAGE_PMD_SHIFT) 66: #define HPAGE_PMD_MASK (~(HPAGE_PMD_SIZE - 1)) 67: 68: extern bool is_vma_temporary_stack(struct vm_area_struct *vma); 69: 70: #define transparent_hugepage_enabled(__vma) \ 71: ((transparent_hugepage_flags & \ 72: (1<<TRANSPARENT_HUGEPAGE_FLAG) || \ 73: (transparent_hugepage_flags & \ 74: (1<<TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG) && \ 75: ((__vma)->vm_flags & VM_HUGEPAGE))) && \ 76: !((__vma)->vm_flags & VM_NOHUGEPAGE) && \ 77: !is_vma_temporary_stack(__vma)) 78: #define transparent_hugepage_defrag(__vma) \ 79: ((transparent_hugepage_flags & \ 80: (1<<TRANSPARENT_HUGEPAGE_DEFRAG_FLAG)) || \ 81: (transparent_hugepage_flags & \ 82: (1<<TRANSPARENT_HUGEPAGE_DEFRAG_REQ_MADV_FLAG) && \ 83: (__vma)->vm_flags & VM_HUGEPAGE)) 84: #define transparent_hugepage_use_zero_page() \ 85: (transparent_hugepage_flags & \ 86: (1<<TRANSPARENT_HUGEPAGE_USE_ZERO_PAGE_FLAG)) 87: #ifdef CONFIG_DEBUG_VM 88: #define transparent_hugepage_debug_cow() \ 89: (transparent_hugepage_flags & \ 90: (1<<TRANSPARENT_HUGEPAGE_DEBUG_COW_FLAG)) 91: #else /* CONFIG_DEBUG_VM */ 92: #define transparent_hugepage_debug_cow() 0 93: #endif /* CONFIG_DEBUG_VM */ 94: 95: extern unsigned long transparent_hugepage_flags; 96: extern int copy_pte_range(struct mm_struct *dst_mm, struct mm_struct *src_mm, 97: pmd_t *dst_pmd, pmd_t *src_pmd, 98: struct vm_area_struct *vma, 99: unsigned long addr, unsigned long end); 100: extern int split_huge_page_to_list(struct page *page, struct list_head *list); 101: static inline int split_huge_page(struct page *page) 102: { 103: return split_huge_page_to_list(page, NULL); 104: } 105: extern void __split_huge_page_pmd(struct vm_area_struct *vma, 106: unsigned long address, pmd_t *pmd); 107: #define split_huge_page_pmd(__vma, __address, __pmd) \ 108: do { \ 109: pmd_t *____pmd = (__pmd); \ 110: if (unlikely(pmd_trans_huge(*____pmd))) \ 111: __split_huge_page_pmd(__vma, __address, \ 112: ____pmd); \ 113: } while (0) 114: #define wait_split_huge_page(__anon_vma, __pmd) \ 115: do { \ 116: pmd_t *____pmd = (__pmd); \ 117: anon_vma_lock_write(__anon_vma); \ 118: anon_vma_unlock_write(__anon_vma); \ 119: BUG_ON(pmd_trans_splitting(*____pmd) || \ 120: pmd_trans_huge(*____pmd)); \ 121: } while (0) 122: extern void split_huge_page_pmd_mm(struct mm_struct *mm, unsigned long address, 123: pmd_t *pmd); 124: #if HPAGE_PMD_ORDER >= MAX_ORDER 125: #error "hugepages can't be allocated by the buddy allocator" 126: #endif 127: extern int hugepage_madvise(struct vm_area_struct *vma, 128: unsigned long *vm_flags, int advice); 129: extern void __vma_adjust_trans_huge(struct vm_area_struct *vma, 130: unsigned long start, 131: unsigned long end, 132: long adjust_next); 133: extern int __pmd_trans_huge_lock(pmd_t *pmd, struct vm_area_struct *vma, 134: spinlock_t **ptl); 135: /* mmap_sem must be held on entry */ 136: static inline int pmd_trans_huge_lock(pmd_t *pmd, struct vm_area_struct *vma, 137: spinlock_t **ptl) 138: { 139: VM_BUG_ON(!rwsem_is_locked(&vma->vm_mm->mmap_sem)); 140: if (pmd_trans_huge(*pmd)) 141: return __pmd_trans_huge_lock(pmd, vma, ptl); 142: else 143: return 0; 144: } 145: static inline void vma_adjust_trans_huge(struct vm_area_struct *vma, 146: unsigned long start, 147: unsigned long end, 148: long adjust_next) 149: { 150: if (!vma->anon_vma || vma->vm_ops) 151: return; 152: __vma_adjust_trans_huge(vma, start, end, adjust_next); 153: } 154: static inline int hpage_nr_pages(struct page *page) 155: { 156: if (unlikely(PageTransHuge(page))) 157: return HPAGE_PMD_NR; 158: return 1; 159: } 160: static inline struct page *compound_trans_head(struct page *page) 161: { 162: if (PageTail(page)) { 163: struct page *head; 164: head = page->first_page; 165: smp_rmb(); 166: /* 167: * head may be a dangling pointer. 168: * __split_huge_page_refcount clears PageTail before 169: * overwriting first_page, so if PageTail is still 170: * there it means the head pointer isn't dangling. 171: */ 172: if (PageTail(page)) 173: return head; 174: } 175: return page; 176: } 177: 178: extern int do_huge_pmd_numa_page(struct mm_struct *mm, struct vm_area_struct *vma, 179: unsigned long addr, pmd_t pmd, pmd_t *pmdp); 180: 181: #else /* CONFIG_TRANSPARENT_HUGEPAGE */ 182: #define HPAGE_PMD_SHIFT ({ BUILD_BUG(); 0; }) 183: #define HPAGE_PMD_MASK ({ BUILD_BUG(); 0; }) 184: #define HPAGE_PMD_SIZE ({ BUILD_BUG(); 0; }) 185: 186: #define hpage_nr_pages(x) 1 187: 188: #define transparent_hugepage_enabled(__vma) 0 189: 190: #define transparent_hugepage_flags 0UL 191: static inline int 192: split_huge_page_to_list(struct page *page, struct list_head *list) 193: { 194: return 0; 195: } 196: static inline int split_huge_page(struct page *page) 197: { 198: return 0; 199: } 200: #define split_huge_page_pmd(__vma, __address, __pmd) \ 201: do { } while (0) 202: #define wait_split_huge_page(__anon_vma, __pmd) \ 203: do { } while (0) 204: #define split_huge_page_pmd_mm(__mm, __address, __pmd) \ 205: do { } while (0) 206: #define compound_trans_head(page) compound_head(page) 207: static inline int hugepage_madvise(struct vm_area_struct *vma, 208: unsigned long *vm_flags, int advice) 209: { 210: BUG(); 211: return 0; 212: } 213: static inline void vma_adjust_trans_huge(struct vm_area_struct *vma, 214: unsigned long start, 215: unsigned long end, 216: long adjust_next) 217: { 218: } 219: static inline int pmd_trans_huge_lock(pmd_t *pmd, struct vm_area_struct *vma, 220: spinlock_t **ptl) 221: { 222: return 0; 223: } 224: 225: static inline int do_huge_pmd_numa_page(struct mm_struct *mm, struct vm_area_struct *vma, 226: unsigned long addr, pmd_t pmd, pmd_t *pmdp) 227: { 228: return 0; 229: } 230: 231: #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ 232: 233: #endif /* _LINUX_HUGE_MM_H */ 234: