linux-kernel - Re: [PATCH] x86: remove __phys_reloc

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Message-ID: <4C62F574.7000300@zytor.com>
Date:	Wed, 11 Aug 2010 12:09:40 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Namhyung Kim <namhyung@...il.com>
CC:	Ingo Molnar <mingo@...e.hu>, Andi Kleen <andi@...stfloor.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, x86@...nel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86: remove __phys_reloc_hide

On 08/10/2010 10:44 PM, Namhyung Kim wrote:
> 2010-08-10 (화), 19:46 +0900, Namhyung Kim:
> 
>> No problem. :-) But before that, let me clarify this: It seems
>> -fno-strict-overflow is all about the signed arithmetic and
>> __pa_symbol() does unsigned one. Is it really matters here?
>>
> 
> Oops, my bad, I found the description of -fstrict-overflow in gcc manual
> that it also affects the semantics of pointer and unsigned integer
> arithmetic. Sorry for the noise.
> 

Not unsigned integers, those are defined by the C standard to wrap.

	-hpa
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