On Fri, Aug 29, 2014 at 09:04:41AM -0700, Kees Cook wrote: > On Tue, Aug 26, 2014 at 7:43 AM, Will Deacon <will.deacon@xxxxxxx> wrote: > > Hmm, so do you mandate that preemption is disabled during sections of code > > where the permissions must be changed after boot? (e.g. ftrace patching) > > I guess it's not enforced (how do I make sure preempt is off?), but > it's only used during the ftrace patching. I'm open to suggestions! (I > had avoided going the fixmap route since I would have expected that to > be much slower.) For ftrace patching this is called under stop_machine() so preemption is already off there. -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
