1 files changed, 9 insertions, 12 deletions

diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 678fc72c3646..e6410d8edd0e 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -59,7 +59,6 @@ static void huge_pagevec_release(struct pagevec *pvec)
 static int hugetlbfs_file_mmap(struct file *file, struct vm_area_struct *vma)
 {
         struct inode *inode = file->f_dentry->d_inode;
-        struct hugetlbfs_inode_info *info = HUGETLBFS_I(inode);
         loff_t len, vma_len;
         int ret;
 
@@ -87,9 +86,10 @@ static int hugetlbfs_file_mmap(struct file *file, struct vm_area_struct *vma)
         if (!(vma->vm_flags & VM_WRITE) && len > inode->i_size)
                 goto out;
 
-        if (vma->vm_flags & VM_MAYSHARE)
-                if (hugetlb_extend_reservation(info, len >> HPAGE_SHIFT) != 0)
-                        goto out;
+        if (vma->vm_flags & VM_MAYSHARE &&
+            hugetlb_reserve_pages(inode, vma->vm_pgoff >> (HPAGE_SHIFT-PAGE_SHIFT),
+                                  len >> HPAGE_SHIFT))
+                goto out;
 
         ret = 0;
         hugetlb_prefault_arch_hook(vma->vm_mm);
@@ -195,12 +195,8 @@ static void truncate_hugepages(struct inode *inode, loff_t lstart)
         const pgoff_t start = lstart >> HPAGE_SHIFT;
         struct pagevec pvec;
         pgoff_t next;
-        int i;
+        int i, freed = 0;
 
-        hugetlb_truncate_reservation(HUGETLBFS_I(inode),
-                                     lstart >> HPAGE_SHIFT);
-        if (!mapping->nrpages)
-                return;
         pagevec_init(&pvec, 0);
         next = start;
         while (1) {
@@ -221,10 +217,12 @@ static void truncate_hugepages(struct inode *inode, loff_t lstart)
                         truncate_huge_page(page);
                         unlock_page(page);
                         hugetlb_put_quota(mapping);
+                        freed++;
                 }
                 huge_pagevec_release(&pvec);
         }
         BUG_ON(!lstart && mapping->nrpages);
+        hugetlb_unreserve_pages(inode, start, freed);
 }
 
 static void hugetlbfs_delete_inode(struct inode *inode)
@@ -366,6 +364,7 @@ static struct inode *hugetlbfs_get_inode(struct super_block *sb, uid_t uid,
                 inode->i_mapping->a_ops = &hugetlbfs_aops;
                 inode->i_mapping->backing_dev_info =&hugetlbfs_backing_dev_info;
                 inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+                INIT_LIST_HEAD(&inode->i_mapping->private_list);
                 info = HUGETLBFS_I(inode);
                 mpol_shared_policy_init(&info->policy, MPOL_DEFAULT, NULL);
                 switch (mode & S_IFMT) {
@@ -538,7 +537,6 @@ static struct inode *hugetlbfs_alloc_inode(struct super_block *sb)
                 hugetlbfs_inc_free_inodes(sbinfo);
                 return NULL;
         }
-        p->prereserved_hpages = 0;
         return &p->vfs_inode;
 }
 
@@ -781,8 +779,7 @@ struct file *hugetlb_zero_setup(size_t size)
                 goto out_file;
 
         error = -ENOMEM;
-        if (hugetlb_extend_reservation(HUGETLBFS_I(inode),
-                                       size >> HPAGE_SHIFT) != 0)
+        if (hugetlb_reserve_pages(inode, 0, size >> HPAGE_SHIFT))
                 goto out_inode;
 
         d_instantiate(dentry, inode);