From mboxrd@z Thu Jan  1 00:00:00 1970
From: will.deacon@arm.com (Will Deacon)
Date: Thu, 16 Aug 2012 11:05:37 +0100
Subject: [PATCH v2 03/31] arm64: Exception handling
In-Reply-To: <201208151303.47743.arnd@arndb.de>
References: <1344966752-16102-1-git-send-email-catalin.marinas@arm.com>
 <1344966752-16102-4-git-send-email-catalin.marinas@arm.com>
 <201208151303.47743.arnd@arndb.de>
Message-ID: <20120816100536.GF31784@mudshark.cambridge.arm.com>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

On Wed, Aug 15, 2012 at 02:03:47PM +0100, Arnd Bergmann wrote:
> On Tuesday 14 August 2012, Catalin Marinas wrote:
> 
> > +#ifdef CONFIG_AARCH32_EMULATION
> > +#define compat_thumb_mode(regs) \
> > +	(((regs)->pstate & COMPAT_PSR_T_BIT))
> > +#else
> > +#define compat_thumb_mode(regs) (0)
> > +#endif
> 
> The symbol we use on other platforms is CONFIG_COMPAT. I don't think you
> need to have a separate CONFIG_AARCH32_EMULATION

Using COMPAT does preclude the possibility of doing something like the x32
ABI later on though. Some other architectures seem to do something similar
(MIPS32_COMPAT, IA32_EMULATION).

Will