By dropping GPIO sysfs WiringPi ISR does not work anymore.
users currently relying on WiringPi should NOT upgrade to the latest kernel at the moment, please stand by for another week or so
This is a known bug and the maintainer team is working on quickfix that'll re-enable basic ISR support as well as a long-term solution that'll ensure all hardware revisions are supported in a meaningful manner.
More information may be found in discussions: