On 07/12/2016 11:04 PM, Sebastian Andrzej Siewior wrote: > * Steven Rostedt | 2016-07-12 10:24:16 [-0400]: > >> 4.1.27-rt31-rc1 stable review patch. >> If anyone has any objections, please let me know. > > I don't recommend to cherry-pick this. The symbol it selects > (HAVE_ARM_TWD) has "depends on SMP" in v4.1. In v4.4 there should be > AM43xx which is UP and also uses the TWD so the change is simple here. >
yes. AM43xx is UP and supports ARM TWD, but there could be some 'issues' in !RT case :( ARM TWD might be powered off in deep CPU Idle states and lose its context if !RT & CPUIDLE, so there are should be backup broadcast timer configured. And that can cause build issues related to tick_broadcast()->smp_cross_call(). I've solved it locally for OMAP2 only: commit 0b3e6fca4d1af4aa150d32506220f4241323a00c ^Just FYI. But may be it can be done in more generic way. regards, -grygorii
