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From: Andy Lutomirski <luto@kernel.org>
Date: Tue, 2 Oct 2018 21:27:21 -0700
Message-ID: <CALCETrXcJCNFJ3fbFnxvijk4ts_yoxHnqM7xbZTir0MrhnvceA@mail.gmail.com>
Subject: Re: [PATCH 4.14 114/165] x86/vdso: Fix vDSO build if a retpoline is emitted
To: nikola.ciprich@linuxbox.cz
Cc: Greg KH <gregkh@linuxfoundation.org>,
        LKML <linux-kernel@vger.kernel.org>,
        stable <stable@vger.kernel.org>,
        Andrew Lutomirski <luto@kernel.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Matt Rickard <matt@softrans.com.au>,
        Borislav Petkov <bp@alien8.de>, jason.vas.dias@gmail.com,
        David Woodhouse <dwmw2@infradead.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Andi Kleen <ak@linux.intel.com>
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On Tue, Oct 2, 2018 at 1:21 AM Nikola Ciprich
<nikola.ciprich@linuxbox.cz> wrote:
>
> Hi Greg and others,
>
> sorry for reporting this so late, but still...
>
> this breaks build on older compilers, since it requires
> -mindirect-branch=thunk-inline -mindirect-branch-register even though
> retpoline support is disabled in kernel config.. is this expected?
>

Nope, my patch was buggy.  Can you test the fix I just sent?