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Date: Thu, 9 Nov 2017 08:50:09 -0800
From: Sami Tolvanen <samitolvanen@google.com>
To: Andi Kleen <ak@linux.intel.com>
Cc: Yury Norov <ynorov@caviumnetworks.com>, linux-kernel@vger.kernel.org,
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        Maxim Kuvyrkov <maxim.kuvyrkov@linaro.org>,
        Alex Matveev <alxmtvv@gmail.com>
Subject: Re: [PATCH 13/15] arm64: fix mrs_s/msr_s macros for clang LTO
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On Wed, Nov 08, 2017 at 04:02:22PM -0800, Andi Kleen wrote:
> There's also older patches to enable single-pass-linking for kallsyms,
> which is extremly useful for LTO build performance.

Excellent, can you point me to the patch in question?

I worked around the build performance problem by reusing vmlinux.o for
kallsyms instead of linking all bitcode again in each step. I'm not sure
if this is feasible with gcc.

Sami