aboutsummaryrefslogtreecommitdiff
path: root/include/linux/hugetlb.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/linux/hugetlb.h')
-rw-r--r--include/linux/hugetlb.h45
1 files changed, 31 insertions, 14 deletions
diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index 68d82ad6b17..d6f1019625a 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;
};
@@ -144,6 +157,10 @@ static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb)
extern 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);