linux-kernel - Re: [PATCH] ARM: disable KCOV for trusted foundations code

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Date:   Tue, 3 Jul 2018 10:51:36 -0700
From:   Olof Johansson <olof@...om.net>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Russell King <linux@...linux.org.uk>,
        Mark Rutland <mark.rutland@....com>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Dmitry Vyukov <dvyukov@...gle.com>
Subject: Re: [PATCH] ARM: disable KCOV for trusted foundations code

On Tue, May 29, 2018 at 12:36:26PM +0200, Arnd Bergmann wrote:
> The ARM trusted foundations code is currently broken in linux-next
> when CONFIG_KCOV_INSTRUMENT_ALL is set:
> 
> /tmp/ccHdQsCI.s: Assembler messages:
> /tmp/ccHdQsCI.s:37: Error: .err encountered
> /tmp/ccHdQsCI.s:38: Error: .err encountered
> /tmp/ccHdQsCI.s:39: Error: .err encountered
> scripts/Makefile.build:311: recipe for target 'arch/arm/firmware/trusted_foundations.o' failed
> 
> I could not find a function attribute that lets me disable
> -fsanitize-coverage=trace-pc for just one function, so this
> turns it off for the entire file instead.
> 
> Fixes: mmotm ("arm: port KCOV to arm")
> Cc: Dmitry Vyukov <dvyukov@...gle.com>
> Cc: Mark Rutland <mark.rutland@....com>
> Cc: Andrew Morton <akpm@...ux-foundation.org>
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

Applied to arm-soc fixes branch for v4.18.


-Olof