diff --git a/fs/ecryptfs/read_write.c b/fs/ecryptfs/read_write.c
index db184ef..85d4309 100644
--- a/fs/ecryptfs/read_write.c
+++ b/fs/ecryptfs/read_write.c
@@ -44,15 +44,11 @@
 	ssize_t rc;
 
 	inode_info = ecryptfs_inode_to_private(ecryptfs_inode);
-	mutex_lock(&inode_info->lower_file_mutex);
 	BUG_ON(!inode_info->lower_file);
-	inode_info->lower_file->f_pos = offset;
 	fs_save = get_fs();
 	set_fs(get_ds());
-	rc = vfs_write(inode_info->lower_file, data, size,
-		       &inode_info->lower_file->f_pos);
+	rc = vfs_write(inode_info->lower_file, data, size, &offset);
 	set_fs(fs_save);
-	mutex_unlock(&inode_info->lower_file_mutex);
 	mark_inode_dirty_sync(ecryptfs_inode);
 	return rc;
 }
@@ -234,15 +230,11 @@
 	mm_segment_t fs_save;
 	ssize_t rc;
 
-	mutex_lock(&inode_info->lower_file_mutex);
 	BUG_ON(!inode_info->lower_file);
-	inode_info->lower_file->f_pos = offset;
 	fs_save = get_fs();
 	set_fs(get_ds());
-	rc = vfs_read(inode_info->lower_file, data, size,
-		      &inode_info->lower_file->f_pos);
+	rc = vfs_read(inode_info->lower_file, data, size, &offset);
 	set_fs(fs_save);
-	mutex_unlock(&inode_info->lower_file_mutex);
 	return rc;
 }