linux-kernel - Re: [RFC PATCH 13/12] Retpoline vs. CONFIG_TRIM_UNUSED

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Date:   Sun, 07 Jan 2018 17:32:32 +0000
From:   David Woodhouse <dwmw2@...radead.org>
To:     "Lu, Hongjiu" <hongjiu.lu@...el.com>,
        Andi Kleen <ak@...ux.intel.com>,
        "Van De Ven, Arjan" <arjan.van.de.ven@...el.com>,
        "Tsimbalist, Igor V" <igor.v.tsimbalist@...el.com>
Cc:     Paul Turner <pjt@...gle.com>, LKML <linux-kernel@...r.kernel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Greg Kroah-Hartman <gregkh@...ux-foundation.org>,
        Tim Chen <tim.c.chen@...ux.intel.com>,
        "Hansen, Dave" <dave.hansen@...el.com>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        Kees Cook <keescook@...gle.com>,
        Rik van Riel <riel@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Andy Lutomirski <luto@...capital.net>,
        Jiri Kosina <jikos@...nel.org>,
        "gnomes@...rguk.ukuu.org.uk" <gnomes@...rguk.ukuu.org.uk>
Subject: Re: [RFC PATCH 13/12] Retpoline vs. CONFIG_TRIM_UNUSED_SYMBOLS

On Sun, 2018-01-07 at 15:09 +0000, Lu, Hongjiu wrote:
> Sure, I can use __x86_indirect_thunk_rax.

Great, thanks.

I've made that change on top of your 20171219 patch set which is the
latest I've seen, and pushed it to my tree at
http://git.infradead.org/users/dwmw2/gcc-retpoline.git/shortlog/refs/heads/retpoline-20180107

I assume you'll want to redo those patches so that it's
__x86_indirect_thunk_rax from the start, rather than starting with dots
and then changing it, but I'll let you deal with that and push it
upstream. Building compiler now, and then I'll update and simplify the
kernel patches accordingly.

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