#ifdef CONFIG_HUGETLB_PAGE
#include <linux/mempolicy.h>
+#include <asm/tlbflush.h>
struct ctl_table;
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);
+int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma,
+ unsigned long address, int write_access);
+
+extern unsigned long max_huge_pages;
+extern const unsigned long hugetlb_zero, hugetlb_infinity;
+extern int sysctl_hugetlb_shm_group;
+
+/* arch callbacks */
+
+pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr);
+pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr);
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;
+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
+#ifndef ARCH_HAS_SETCLEAR_HUGE_PTE
+#define set_huge_pte_at(mm, addr, ptep, pte) set_pte_at(mm, addr, ptep, pte)
+#define huge_ptep_get_and_clear(mm, addr, ptep) ptep_get_and_clear(mm, addr, ptep)
+#else
+void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
+ pte_t *ptep, pte_t pte);
+pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
+ pte_t *ptep);
+#endif
+
+#ifndef ARCH_HAS_HUGETLB_PREFAULT_HOOK
+#define hugetlb_prefault_arch_hook(mm) do { } while (0)
+#else
+void hugetlb_prefault_arch_hook(struct mm_struct *mm);
+#endif
+
#else /* !CONFIG_HUGETLB_PAGE */
static inline int is_vm_hugetlb_page(struct vm_area_struct *vma)
#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_pgd_range(tlb, addr, end, floor, ceiling) \
- do { } while (0)
-#define alloc_huge_page() ({ 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 0 /* Keep the compiler happy */
-#define HPAGE_SIZE 0
+#define HPAGE_MASK PAGE_MASK /* Keep the compiler happy */
+#define HPAGE_SIZE PAGE_SIZE
#endif
#endif /* !CONFIG_HUGETLB_PAGE */
struct hugetlbfs_inode_info {
struct shared_policy policy;
+ /* Protected by the (global) hugetlb_lock */
+ unsigned long prereserved_hpages;
struct inode vfs_inode;
};
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);
git://git.onelab.eu / linux-2.6.git / blobdiff