mm: tiny-shmem fix lock ordering: mmap_sem vs i_mutex
[linux-2.6.git] / mm / tiny-shmem.c
index f0f55875dd6acc34d3c9ee05298cd43dcea02650..d17cb6f6ab1029cdad5ef6a67523be159ff12211 100644 (file)
@@ -65,25 +65,21 @@ struct file *shmem_file_setup(char *name, loff_t size, unsigned long flags)
        if (!dentry)
                goto put_memory;
 
-       error = -ENOSPC;
-       inode = ramfs_get_inode(root->d_sb, S_IFREG | S_IRWXUGO, 0);
-       if (!inode)
-               goto put_dentry;
-
-       d_instantiate(dentry, inode);
        error = -ENFILE;
-       file = alloc_file(shm_mnt, dentry, FMODE_WRITE | FMODE_READ,
-                       &ramfs_file_operations);
+       file = get_empty_filp();
        if (!file)
                goto put_dentry;
 
-       inode->i_nlink = 0;     /* It is unlinked */
-
-       /* notify everyone as to the change of file size */
-       error = do_truncate(dentry, size, 0, file);
-       if (error < 0)
+       error = -ENOSPC;
+       inode = ramfs_get_inode(root->d_sb, S_IFREG | S_IRWXUGO, 0);
+       if (!inode)
                goto close_file;
 
+       d_instantiate(dentry, inode);
+       inode->i_size = size;
+       inode->i_nlink = 0;     /* It is unlinked */
+       init_file(file, shm_mnt, dentry, FMODE_WRITE | FMODE_READ,
+                       &ramfs_file_operations);
        return file;
 
 close_file: