On Mon, Mar 22, 2021 at 11:19:58AM +0100, Sebastian Andrzej Siewior wrote: > This is a heads up to the RT stable team: The following patch made into > the stable tree. RT-version prior to the v5.4 series don't have > CONFIG_PREEMPT_RT defined. It is needed to use CONFIG_PREEMPT_RT_BASE in > this context in order to keep RT working. Ah, I didn't realize this was different, I thought I was making things easier for you all, not harder :( Should I just drop the commit from older than 5.4 trees? thanks, greg k-h