linux-kernel - Re: [PATCH v2 56/76] ARC: Unaligned access emulation

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Message-Id: <201301181454.36279.arnd@arndb.de>
Date:	Fri, 18 Jan 2013 14:54:36 +0000
From:	Arnd Bergmann <arnd@...db.de>
To:	Vineet Gupta <Vineet.Gupta1@...opsys.com>
Cc:	linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org,
	Tim Yao <tim.yao@...ogic.com>
Subject: Re: [PATCH v2 56/76] ARC: Unaligned access emulation

On Friday 18 January 2013, Vineet Gupta wrote:
> ARC700 doesn't natively support unaligned access, but can be emulated
> -Unaligned Access Exception
> -Disassembly at the Fault address to find the exact insn (long/short)
> 
> Also per Arnd's comment, we runtime control it using 2 sysctl knobs:
> * SYSCTL_ARCH_UNALIGN_ALLOW: Runtime enable/disble
> * SYSCTL_ARCH_UNALIGN_NO_WARN: Warn on each emulation attempt
> 
> Originally contributed by Tim Yao <tim.yao@...ogic.com>
> 
> Signed-off-by: Vineet Gupta <vgupta@...opsys.com>
> Cc: Tim Yao <tim.yao@...ogic.com>

Acked-by: Arnd Bergmann <arnd@...db.de>
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