Robuta

https://lkml.iu.edu/hypermail/linux/kernel/1601.0/01033.html Linux-Kernel Archive: Re: [PATCH] arm64: entry.S: add missing trace_hardirqs_off https://lwn.net/Articles/95332/ voluntary-preempt-2.6.8-rc2-L2, preemptable hardirqs [LWN.net] voluntary preempt https://lkml.indiana.edu/1501.1/00319.html Linux-Kernel Archive: [PATCH 3/4] x86: open-code register save/restore in trace_hardirqs thunks