ioctl_fsfreeze and FIFREEZE timeout value

Hello. Sorry for e-mail to, may be, wrong list.
I'm try out use FIFREEZE ioctl to do some magic stuff with fs, as i read lkml some version of patch contains ability to set timeout for fs freeze, but now i check kernel git and does not see any params for freeze to setup timeout.
I'm use linux-3.0.0-rc3, ioctl run returns success, but fs does not unfrozen after timeout.
Where my mistake or may be this feature not included in kernel now ?