linux-kernel - Re: [PATCH] avr32: fix asm operand constraint in cmpxchg()

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Message-ID: <56E1B154.8000907@gmail.com>
Date:	Thu, 10 Mar 2016 23:09:32 +0530
From:	Sudip Mukherjee <sudipm.mukherjee@...il.com>
To:	Mans Rullgard <mans@...sr.com>,
	Haavard Skinnemoen <hskinnemoen@...il.com>,
	Hans-Christian Egtvedt <egtvedt@...fundet.no>
CC:	Andy Shevchenko <andy.shevchenko@...il.com>,
	Guenter Roeck <linux@...ck-us.net>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] avr32: fix asm operand constraint in cmpxchg()

On Thursday 10 March 2016 07:53 PM, Mans Rullgard wrote:
> If the 'old' operand to cmpxchg() is a constant wider than 21 bits,
> linking fails with a "relocation truncated to fit: R_AVR32_21S" error.
>
> Fix this by replacing the "i" constraint with "Ks21" which makes the
> compiler use a temporary register for out of range constants.
>
> Signed-off-by: Mans Rullgard <mans@...sr.com>

build log at: https://gitlab.com/sudipm/linux-next/builds/839572

Tested-by: Sudip Mukherjee <sudip.mukherjee@...ethink.co.uk>

regards
sudip