Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6

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

diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index e465fbf1ef5fcd04b2b411b38525faf40c8840af..4c5e610fe442eb7a4c116d84dda43bfcd9923ced 100644 (file)
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -36,7 +36,6 @@ 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);
@@ -47,11 +46,25 @@ void hugetlb_change_protection(struct vm_area_struct *vma,
 
 #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
@@ -91,7 +104,6 @@ static inline unsigned long hugetlb_total_pages(void)
 #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
@@ -142,7 +154,7 @@ 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,