Message-ID: <53B2A7D4.4020007@linaro.org>
Date: Tue, 01 Jul 2014 07:21:40 -0500
From: Alex Elder <elder@linaro.org>
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To: Russell King - ARM Linux <linux@arm.linux.org.uk>
CC: bcm@fixthebug.org, mporter@linaro.org,
        bcm-kernel-feedback-list@broadcom.com, linux-kernel@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH] mach-bcm SMC: address clang inline asm incompatibility
References: <1404216339-6480-1-git-send-email-elder@linaro.org> <20140701121544.GK32514@n2100.arm.linux.org.uk>
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On 07/01/2014 07:15 AM, Russell King - ARM Linux wrote:
> On Tue, Jul 01, 2014 at 07:05:39AM -0500, Alex Elder wrote:
>> My GCC-based build environment likes to call register r12 by the
>> name "ip" in inline asm.  Behan Webster informed me that his Clang-
>> based build environment likes "r12" instead.
> 
> Two objections, one of which is an acceptable outcome:
> 1. Why can't clang just learn these alternative names?

I suggested that.  I don't know where to send that suggestion
though.

> 2. Why can't we just use "r12" here?

I don't recall the details, but when I wrote the code originally
that way it gave me errors.  It's why I had the "Also called r12"
comment next to the symbol declaration.

I agree, I'd rather have either one of those than this #ifdef
workaround.  I was supplying this as a potentially quicker fix
for the problem Behan was hitting.

					-Alex
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