On Wed, 2018-02-21 at 02:34 -0800, tip-bot for Peter Zijlstra wrote: > > --- a/Makefile > +++ b/Makefile > @@ -489,6 +489,11 @@ KBUILD_CFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC) > KBUILD_AFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC) > endif > > +ifneq ($(call cc-option,-mindirect-branch=thunk-extern -mindirect-branch-register),) > + CC_HAS_RETPOLINE := 1 > +endif > +export CC_HAS_RETPOLINE > + That isn't the same as the check in arch/x86/Makefile.
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