On Mon 2016-01-25 16:29:54, Torsten Duwe wrote: > diff --git a/arch/powerpc/kernel/ftrace.c b/arch/powerpc/kernel/ftrace.c > index ef8b916..29b7014 100644 > --- a/arch/powerpc/kernel/ftrace.c > +++ b/arch/powerpc/kernel/ftrace.c > @@ -28,6 +28,11 @@ > > > #ifdef CONFIG_DYNAMIC_FTRACE > +#if defined(CONFIG_DYNAMIC_FTRACE_WITH_REGS) && defined(CONFIG_PPC64) && \ > + !defined(CC_USING_MPROFILE_KERNEL) > +#error "DYNAMIC_FTRACE_WITH_REGS requires working -mprofile-kernel" > +#endif CONFIG_DYNAMIC_FTRACE_WITH_REGS is automatically enabled when both CONFIG_DYNAMIC_FTRACE and HAVE_DYNAMIC_FTRACE_WITH_REGS are enabled. Therefore it is not possible to build kernel with broken gcc and DYNAMIC_FTRACE. IMHO, we need to allow to explicitely disable DYNAMIC_FTRACE_WITH_REGS if the compiler is broken to get around this build error. We either need to define DYNAMIC_FTRACE_WITH_REGS as a proper bool with description, help text, ... Or we need a way to explicitely disable HAVE_DYNAMIC_FTRACE_WITH_REGS. Or something like this. Best Regards, Petr -- 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
