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Date:   Wed, 24 Apr 2019 07:12:17 -0700
From:   Tony Lindgren <tony@atomide.com>
To:     Stefan Agner <stefan@agner.ch>
Cc:     arnd@arndb.de, arm@kernel.org, linux@armlinux.org.uk,
        ard.biesheuvel@linaro.org, robin.murphy@arm.com,
        nicolas.pitre@linaro.org, f.fainelli@gmail.com, rjui@broadcom.com,
        sbranden@broadcom.com, bcm-kernel-feedback-list@broadcom.com,
        kgene@kernel.org, krzk@kernel.org, robh@kernel.org,
        ssantosh@kernel.org, jason@lakedaemon.net, andrew@lunn.ch,
        gregory.clement@bootlin.com, sebastian.hesselbarth@gmail.com,
        marc.w.gonzalez@free.fr, mans@mansr.com, ndesaulniers@google.com,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 1/4] ARM: use arch_extension directive instead of arch
 argument
Message-ID: <20190424141217.GC8007@atomide.com>
References: <f48c245e7e2b432f6771a5f97ff9f4b5bedc5089.1554968922.git.stefan@agner.ch>
 <2f3d0fa7ba599f46960ad3e7419477fd@agner.ch>
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* Stefan Agner <stefan@agner.ch> [190423 20:20]:
> On 11.04.2019 09:54, Stefan Agner wrote:
> > The LLVM Target parser currently does not allow to specify the security
> > extension as part of -march (see also LLVM Bug 40186 [0]). When trying
> > to use Clang with LLVM's integrated assembler, this leads to build
> > errors such as this:
> >   clang-8: error: the clang compiler does not support '-Wa,-march=armv7-a+sec'
> > 
> > Use ".arch_extension sec" to enable the security extension in a more
> > portable fasion. Also make sure to use ".arch armv7-a" in case a v6/v7
> > multi-platform kernel is being built.
> > 
> > Note that this is technically not exactly the same as the old code
> > checked for availabilty of the security extension by calling as-instr.
> > However, there are already other sites which use ".arch_extension sec"
> > unconditionally, hence de-facto we need an assembler capable of
> > ".arch_extension sec" already today (arch/arm/mm/proc-v7.S). The
> > arch extension "sec" is available since binutils 2.21 according to
> > its documentation [1].
> > 
> > [0] https://bugs.llvm.org/show_bug.cgi?id=40186
> > [1] https://sourceware.org/binutils/docs-2.21/as/ARM-Options.html
> > 
> > Signed-off-by: Stefan Agner <stefan@agner.ch>
> > Acked-by: Mans Rullgard <mans@mansr.com>
> > Acked-by: Arnd Bergmann <arnd@arndb.de>
> > Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
> 
> Arnd, Tony,
> 
> Patch 3 and 4 got merged by Gregory. I think the other two patches are
> ready to be merged too. I think they should go in together to avoid
> merge conflicts. Tony, if you agree, can you Ack patch 2 so they can get
> merged through arm-soc?

Sure I just acked it for you.

Thanks,

Tony