On Thu, Jul 31, 2014 at 06:30:12PM +0200, Peter Zijlstra wrote: > On Thu, Jul 31, 2014 at 09:19:02AM -0700, josh@joshtriplett.org wrote: > > Also, ideally this should remain entirely optional; nothing in the core > > kernel should depend on it. > > I suspect Steve wants it for ftrace :-)