diff options
Diffstat (limited to 'include/linux/hugetlb.h')
| -rw-r--r-- | include/linux/hugetlb.h | 47 |
1 files changed, 32 insertions, 15 deletions
diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h index 68d82ad6b17..4c5e610fe44 100644 --- a/include/linux/hugetlb.h +++ b/include/linux/hugetlb.h @@ -20,10 +20,7 @@ void unmap_hugepage_range(struct vm_area_struct *, unsigned long, unsigned long) int hugetlb_prefault(struct address_space *, struct vm_area_struct *); int hugetlb_report_meminfo(char *); int hugetlb_report_node_meminfo(int, char *); -int is_hugepage_mem_enough(size_t); unsigned long hugetlb_total_pages(void); -struct page *alloc_huge_page(struct vm_area_struct *, unsigned long); -void free_huge_page(struct page *); int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, unsigned long address, int write_access); @@ -39,18 +36,35 @@ struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address, int write); struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address, pmd_t *pmd, int write); -int is_aligned_hugepage_range(unsigned long addr, unsigned long len); int pmd_huge(pmd_t pmd); +void hugetlb_change_protection(struct vm_area_struct *vma, + unsigned long address, unsigned long end, pgprot_t newprot); #ifndef ARCH_HAS_HUGEPAGE_ONLY_RANGE #define is_hugepage_only_range(mm, addr, len) 0 -#define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) \ - do { } while (0) +#endif + +#ifndef ARCH_HAS_HUGETLB_FREE_PGD_RANGE +#define hugetlb_free_pgd_range free_pgd_range +#else +void hugetlb_free_pgd_range(struct mmu_gather **tlb, unsigned long addr, + unsigned long end, unsigned long floor, + unsigned long ceiling); #endif #ifndef ARCH_HAS_PREPARE_HUGEPAGE_RANGE -#define prepare_hugepage_range(addr, len) \ - is_aligned_hugepage_range(addr, len) +/* + * If the arch doesn't supply something else, assume that hugepage + * size aligned regions are ok without further preparation. + */ +static inline int prepare_hugepage_range(unsigned long addr, unsigned long len) +{ + if (len & ~HPAGE_MASK) + return -EINVAL; + if (addr & ~HPAGE_MASK) + return -EINVAL; + return 0; +} #else int prepare_hugepage_range(unsigned long addr, unsigned long len); #endif @@ -87,20 +101,17 @@ static inline unsigned long hugetlb_total_pages(void) #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; }) #define hugetlb_prefault(mapping, vma) ({ BUG(); 0; }) #define unmap_hugepage_range(vma, start, end) BUG() -#define is_hugepage_mem_enough(size) 0 #define hugetlb_report_meminfo(buf) 0 #define hugetlb_report_node_meminfo(n, buf) 0 #define follow_huge_pmd(mm, addr, pmd, write) NULL -#define is_aligned_hugepage_range(addr, len) 0 #define prepare_hugepage_range(addr, len) (-EINVAL) #define pmd_huge(x) 0 #define is_hugepage_only_range(mm, addr, len) 0 -#define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) \ - do { } while (0) -#define alloc_huge_page(vma, addr) ({ NULL; }) -#define free_huge_page(p) ({ (void)(p); BUG(); }) +#define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; }) #define hugetlb_fault(mm, vma, addr, write) ({ BUG(); 0; }) +#define hugetlb_change_protection(vma, address, end, newprot) + #ifndef HPAGE_MASK #define HPAGE_MASK PAGE_MASK /* Keep the compiler happy */ #define HPAGE_SIZE PAGE_SIZE @@ -128,6 +139,8 @@ struct hugetlbfs_sb_info { struct hugetlbfs_inode_info { struct shared_policy policy; + /* Protected by the (global) hugetlb_lock */ + unsigned long prereserved_hpages; struct inode vfs_inode; }; @@ -141,9 +154,13 @@ static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb) return sb->s_fs_info; } -extern struct file_operations hugetlbfs_file_operations; +extern const struct file_operations hugetlbfs_file_operations; extern struct vm_operations_struct hugetlb_vm_ops; struct file *hugetlb_zero_setup(size_t); +int hugetlb_extend_reservation(struct hugetlbfs_inode_info *info, + unsigned long atleast_hpages); +void hugetlb_truncate_reservation(struct hugetlbfs_inode_info *info, + unsigned long atmost_hpages); int hugetlb_get_quota(struct address_space *mapping); void hugetlb_put_quota(struct address_space *mapping); |