rem: bootfs_open(fs_cookie _fs, fs_vnode _v, int oflags, file_cookie *_cookie)
add: bootfs_open(fs_volume _fs, fs_vnode _v, int oflags, fs_cookie *_cookie)
context: bootfs_open(fs_cookie _fs, fs_vnode _v, int oflags, file_cookie *_cookie){	struct bootfs *fs = _fs;	struct bootfs_vnode *vnode = _v;	struct bootfs_cookie *cookie;	TRACE(("bootfs_open: vnode %p, oflags 0x%x\n", vnode, oflags));	cookie = kmalloc(sizeof(struct bootfs_cookie));	if (cookie == NULL)		return ENOMEM;	mutex_lock(&fs->lock);	cookie->s = &vnode->stream;	cookie->u.file.pos = 0;	*_cookie = cookie;	mutex_unlock(&fs->lock);	return B_OK;}