linux-kernel - Re: [PATCH 5/5] MIPS: Move FIXADDR

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Message-Id: <20100907.221307.39158422.anemo@mba.ocn.ne.jp>
Date:	Tue, 07 Sep 2010 22:13:07 +0900 (JST)
From:	Atsushi Nemoto <anemo@....ocn.ne.jp>
To:	cernekee@...il.com
Cc:	ralf@...ux-mips.org, linux-mips@...ux-mips.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 5/5] MIPS: Move FIXADDR_TOP into spaces.h

On Mon, 6 Sep 2010 21:03:52 -0700, Kevin Cernekee <cernekee@...il.com> wrote:
> -#define FIXADDR_TOP	((unsigned long)(long)(int)0xfffe0000)
...
> +#define FIXADDR_TOP		_AC(0xfffe0000, UL)

For 64-bit kernel, FIXADDR_TOP should be 0xfffffffffffe0000UL not
0x00000000fffe0000UL.

The magical casts are used to sign-extend the address.  Please do not
drop them.

---
Atsushi Nemoto
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