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Date: Tue, 23 Jan 2018 19:21:26 +0100
From: Borislav Petkov <bp@alien8.de>
To: Peter Zijlstra <peterz@infradead.org>
Cc: David Woodhouse <dwmw2@infradead.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Josh Poimboeuf <jpoimboe@redhat.com>, linux-kernel@vger.kernel.org,
	Dave Hansen <dave.hansen@intel.com>,
	Ashok Raj <ashok.raj@intel.com>,
	Tim Chen <tim.c.chen@linux.intel.com>,
	Andy Lutomirski <luto@kernel.org>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Greg KH <gregkh@linuxfoundation.org>,
	Andrea Arcangeli <aarcange@redhat.com>,
	Andi Kleen <ak@linux.intel.com>,
	Arjan Van De Ven <arjan.van.de.ven@intel.com>,
	Dan Williams <dan.j.williams@intel.com>,
	Paolo Bonzini <pbonzini@redhat.com>,
	Jun Nakajima <jun.nakajima@intel.com>,
	Asit Mallick <asit.k.mallick@intel.com>,
	Jason Baron <jbaron@akamai.com>
Subject: Re: [PATCH 02/24] objtool: Add retpoline validation
Message-ID: <20180123182126.nuwbxppfqmzrzu4i@pd.tnic>
References: <20180123152539.374360046@infradead.org>
 <20180123152638.102799023@infradead.org>
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On Tue, Jan 23, 2018 at 04:25:41PM +0100, Peter Zijlstra wrote:
> David requested a objtool validation pass for RETPOLINE enabled
> builds, where it validates no unannotated indirect  jumps or calls are
> left.
> 
> Add an additional .discard.retpoline_safe section to allow annotating
> the few indirect sites that are required and safe.
> 
> Requested-by: David Woodhouse <dwmw2@infradead.org>
> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
> ---
>  scripts/Makefile.build        |    4 +
>  tools/objtool/builtin-check.c |    3 -
>  tools/objtool/builtin.h       |    2 
>  tools/objtool/check.c         |   87 ++++++++++++++++++++++++++++++++++++++++--
>  tools/objtool/check.h         |    1 
>  5 files changed, 92 insertions(+), 5 deletions(-)

Yap, very noisy:

$ grep indirect build.log | wc -l
12904

Let's see how many will remain at the end of the patchset. :)

-- 
Regards/Gruss,
    Boris.

Good mailing practices for 400: avoid top-posting and trim the reply.