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

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Message-ID: <20100809064441.GC29524@basil.fritz.box>
Date:	Mon, 9 Aug 2010 08:44:41 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Namhyung Kim <namhyung@...il.com>
Cc:	Andi Kleen <andi@...stfloor.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86: remove __phys_reloc_hide

> I'm not talking about the RELOC_HIDE itself. I do know we need it for
> some specific case, ie. percpu. But in this case __pa_symbol(x) is
> expanded to RELOC_HIDE((unsigned long)(x), 0) which does nothing
> meaningful. I believe the overflow is not a concern here.

It hides the value conversion from the compiler through asm()

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only.
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