diff options
Diffstat (limited to 'include/linux/hugetlb.h')
| -rw-r--r-- | include/linux/hugetlb.h | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h new file mode 100644 index 000000000000..ae45676d27ba --- /dev/null +++ b/include/linux/hugetlb.h @@ -0,0 +1,142 @@ +#ifndef _LINUX_HUGETLB_H +#define _LINUX_HUGETLB_H + +#ifdef CONFIG_HUGETLB_PAGE + +#include <linux/mempolicy.h> + +struct ctl_table; + +static inline int is_vm_hugetlb_page(struct vm_area_struct *vma) +{ + return vma->vm_flags & VM_HUGETLB; +} + +int hugetlb_sysctl_handler(struct ctl_table *, int, struct file *, void __user *, size_t *, loff_t *); +int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *); +int follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *, struct page **, struct vm_area_struct **, unsigned long *, int *, int); +void zap_hugepage_range(struct vm_area_struct *, unsigned long, unsigned long); +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 *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); +struct page *alloc_huge_page(void); +void free_huge_page(struct page *); + +extern unsigned long max_huge_pages; +extern const unsigned long hugetlb_zero, hugetlb_infinity; +extern int sysctl_hugetlb_shm_group; + +#ifndef ARCH_HAS_HUGEPAGE_ONLY_RANGE +#define is_hugepage_only_range(mm, addr, len) 0 +#define hugetlb_free_pgtables(tlb, prev, start, end) do { } while (0) +#endif + +#ifndef ARCH_HAS_PREPARE_HUGEPAGE_RANGE +#define prepare_hugepage_range(addr, len) \ + is_aligned_hugepage_range(addr, len) +#else +int prepare_hugepage_range(unsigned long addr, unsigned long len); +#endif + +#else /* !CONFIG_HUGETLB_PAGE */ + +static inline int is_vm_hugetlb_page(struct vm_area_struct *vma) +{ + return 0; +} +static inline unsigned long hugetlb_total_pages(void) +{ + return 0; +} + +#define follow_hugetlb_page(m,v,p,vs,a,b,i) ({ BUG(); 0; }) +#define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL) +#define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; }) +#define hugetlb_prefault(mapping, vma) ({ BUG(); 0; }) +#define zap_hugepage_range(vma, start, len) BUG() +#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_pgtables(tlb, prev, start, end) do { } while (0) +#define alloc_huge_page() ({ NULL; }) +#define free_huge_page(p) ({ (void)(p); BUG(); }) + +#ifndef HPAGE_MASK +#define HPAGE_MASK 0 /* Keep the compiler happy */ +#define HPAGE_SIZE 0 +#endif + +#endif /* !CONFIG_HUGETLB_PAGE */ + +#ifdef CONFIG_HUGETLBFS +struct hugetlbfs_config { + uid_t uid; + gid_t gid; + umode_t mode; + long nr_blocks; + long nr_inodes; +}; + +struct hugetlbfs_sb_info { + long max_blocks; /* blocks allowed */ + long free_blocks; /* blocks free */ + long max_inodes; /* inodes allowed */ + long free_inodes; /* inodes free */ + spinlock_t stat_lock; +}; + + +struct hugetlbfs_inode_info { + struct shared_policy policy; + struct inode vfs_inode; +}; + +static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode) +{ + return container_of(inode, struct hugetlbfs_inode_info, vfs_inode); +} + +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 struct vm_operations_struct hugetlb_vm_ops; +struct file *hugetlb_zero_setup(size_t); +int hugetlb_get_quota(struct address_space *mapping); +void hugetlb_put_quota(struct address_space *mapping); + +static inline int is_file_hugepages(struct file *file) +{ + return file->f_op == &hugetlbfs_file_operations; +} + +static inline void set_file_hugepages(struct file *file) +{ + file->f_op = &hugetlbfs_file_operations; +} +#else /* !CONFIG_HUGETLBFS */ + +#define is_file_hugepages(file) 0 +#define set_file_hugepages(file) BUG() +#define hugetlb_zero_setup(size) ERR_PTR(-ENOSYS) + +#endif /* !CONFIG_HUGETLBFS */ + +#endif /* _LINUX_HUGETLB_H */ |