On Fri, Nov 21, 2014 at 01:22:33AM +0100, Jiri Kosina wrote: > On Thu, 20 Nov 2014, Seth Jennings wrote: > > --- /dev/null > > +++ b/kernel/livepatch/Kconfig > > @@ -0,0 +1,18 @@ > > +config ARCH_HAVE_LIVE_PATCHING > > + boolean > > + help > > + Arch supports kernel live patching > > + > > +config LIVE_PATCHING > > + boolean "Kernel Live Patching" > > + depends on DYNAMIC_FTRACE_WITH_REGS > > + depends on MODULES > > + depends on SYSFS > > + depends on KALLSYMS_ALL > > + depends on ARCH_HAVE_LIVE_PATCHING > > We have to refuse to build on x86_64 if the compiler doesn't support > fentry. mcount is not really usable (well, it would be possible to use it, > be the obstacles are too big to care). > > Something like [1] should be applicable here as well I believe. > > [1] https://git.kernel.org/cgit/linux/kernel/git/jirislaby/kgraft.git/commit/?h=kgraft&id=bd4bc097c72937d18036f1312a4d79ed0bea9991 I think we can use "depends on HAVE_FENTRY" to accomplish this, since CC_USING_FENTRY gets set by the top level kernel Makefile if CONFIG_HAVE_FENTRY is set. -- Josh -- To unsubscribe from this list: send the line "unsubscribe live-patching" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
