From: Peter Zijlstra <peterz@infradead.org>
To: David Woodhouse <dwmw2@infradead.org>
Cc: hpa@zytor.com, luto@kernel.org, arjan@linux.intel.com,
tglx@linutronix.de, dan.j.williams@intel.com,
torvalds@linux-foundation.org, gregkh@linuxfoundation.org,
mingo@kernel.org, bp@alien8.de, linux-kernel@vger.kernel.org,
dave.hansen@linux.intel.com, jpoimboe@redhat.com,
linux-tip-commits@vger.kernel.org
Subject: Re: [tip:x86/pti] objtool, retpolines: Integrate objtool with retpoline support more closely
Date: Wed, 21 Feb 2018 13:53:57 +0100 [thread overview]
Message-ID: <20180221125357.GJ25201@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <1519210754.6482.43.camel@infradead.org>
On Wed, Feb 21, 2018 at 10:59:14AM +0000, David Woodhouse wrote:
> 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.
That's because this crossed with the llvm cruft, right? I'll have a
look.
next prev parent reply other threads:[~2018-02-21 12:53 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <tip-b4879c9b99a43e6c580d563f292a569a016af2a4@git.kernel.org>
2018-02-21 10:59 ` David Woodhouse
2018-02-21 12:53 ` Peter Zijlstra [this message]
2018-02-21 13:12 ` Peter Zijlstra
2018-02-21 15:55 ` [PATCH v2] " Ingo Molnar
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