[PATCH] mm: ZAP_BLOCK causes redundant work

[linux-2.6.git] / include / linux / hugetlb.h

diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index 42cb7d70f9acf9be8e3c13d40b87f340c38cfa6a..1056717ee5013added4ea995fdfbbe202231a22b 100644 (file)
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -16,7 +16,6 @@ static inline int is_vm_hugetlb_page(struct vm_area_struct *vma)
 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 *);
@@ -25,6 +24,8 @@ int is_hugepage_mem_enough(size_t);
 unsigned long hugetlb_total_pages(void);
 struct page *alloc_huge_page(void);
 void free_huge_page(struct page *);
+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;
@@ -85,7 +86,6 @@ static inline unsigned long hugetlb_total_pages(void)
 #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
@@ -99,10 +99,11 @@ static inline unsigned long hugetlb_total_pages(void)
                                                do { } while (0)
 #define alloc_huge_page()                      ({ NULL; })
 #define free_huge_page(p)                      ({ (void)(p); BUG(); })
+#define hugetlb_fault(mm, vma, addr, write)    ({ BUG(); 0; })
 
 #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 */
@@ -155,24 +156,11 @@ static inline void set_file_hugepages(struct file *file)
 {
        file->f_op = &hugetlbfs_file_operations;
 }
-
-static inline int valid_hugetlb_file_off(struct vm_area_struct *vma, 
-                                         unsigned long address) 
-{
-       struct inode *inode = vma->vm_file->f_dentry->d_inode;
-       loff_t file_off = address - vma->vm_start;
-       
-       file_off += (vma->vm_pgoff << PAGE_SHIFT);
-       
-       return (file_off < inode->i_size);
-}
-
 #else /* !CONFIG_HUGETLBFS */
 
 #define is_file_hugepages(file)                0
 #define set_file_hugepages(file)       BUG()
 #define hugetlb_zero_setup(size)       ERR_PTR(-ENOSYS)
-#define valid_hugetlb_file_off(vma, address)   0
 
 #endif /* !CONFIG_HUGETLBFS */