On Tue, 24 Nov 2015 10:05:10 -0500 Steven Rostedt <rostedt at goodmis.org> wrote: > cmpxchg(&panic_cpu, -1, 0) != 0 > > returns -1 for cpu 0, thus 0 != 0, and sets panic_cpu to 0 That was suppose to be "thus -1 != 0". -- Steve