Merge omap tree

[mv-sheeva.git] / fs / hugetlbfs / inode.c

diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 678fc72c3646d0850975d8d724a576f8570adb23..6449cb697967d28818016b9ee4fbbc7519202203 100644 (file)
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -34,7 +34,7 @@
 #define HUGETLBFS_MAGIC        0x958458f6
 
 static struct super_operations hugetlbfs_ops;
-static struct address_space_operations hugetlbfs_aops;
+static const struct address_space_operations hugetlbfs_aops;
 const struct file_operations hugetlbfs_file_operations;
 static struct inode_operations hugetlbfs_dir_inode_operations;
 static struct inode_operations hugetlbfs_inode_operations;
@@ -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;
 }
 
@@ -549,7 +547,7 @@ static void hugetlbfs_destroy_inode(struct inode *inode)
        kmem_cache_free(hugetlbfs_inode_cachep, HUGETLBFS_I(inode));
 }
 
-static struct address_space_operations hugetlbfs_aops = {
+static const struct address_space_operations hugetlbfs_aops = {
        .readpage       = hugetlbfs_readpage,
        .prepare_write  = hugetlbfs_prepare_write,
        .commit_write   = hugetlbfs_commit_write,
@@ -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);