linux-kernel - Re: [PATCH 1/3] hvc_dcc: Fix bad code generation by marking assembly volatile

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Message-ID: <4D0FD02E.3080901@codeaurora.org>
Date:	Mon, 20 Dec 2010 13:52:46 -0800
From:	Stephen Boyd <sboyd@...eaurora.org>
To:	Arnaud Lacombe <lacombar@...il.com>
CC:	Greg Kroah-Hartman <gregkh@...e.de>, linux-kernel@...r.kernel.org,
	linux-arm-msm@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	Tony Lindgren <tony@...mide.com>,
	Arnd Bergmann <arnd@...db.de>,
	Nicolas Pitre <nicolas.pitre@...aro.org>,
	Daniel Walker <dwalker@...eaurora.org>
Subject: Re: [PATCH 1/3] hvc_dcc: Fix bad code generation by marking assembly
 volatile

On 12/20/2010 01:49 PM, Arnaud Lacombe wrote:
> Hi,
>
> On Mon, Dec 20, 2010 at 3:08 PM, Stephen Boyd <sboyd@...eaurora.org> wrote:
>> Without marking the asm __dcc_getstatus() volatile my compiler
>> decides [...]
> What compiler ? That might be a usefull information to know,
> espectially 5 years from now when tracing code history. There has been
> similar issue with gcc 4.5 recently. AFAIK, in the same idea, the
> final change has been to mark the asm volatile.

Sure, we can replace "my compiler" with "my compiler (arm-eabi-gcc (GCC)
4.4.0)".

-- 
Sent by an employee of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.

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