linux-kernel - Re: [PATCH] fix x86-32 early fixmap initialization.

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Message-ID: <20071204125101.GA31590@elte.hu>
Date:	Tue, 4 Dec 2007 13:51:01 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Yinghai Lu <yhlu.kernel@...il.com>
Cc:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
	pageexec@...email.hu
Subject: Re: [PATCH] fix x86-32 early fixmap initialization.


* Yinghai Lu <yhlu.kernel@...il.com> wrote:

> On Dec 1, 2007 5:34 PM, Eric W. Biederman <ebiederm@...ssion.com> wrote:
> >
> > pageexec@...email.hu writes:
> >
> > > hello,
> > >
> > > i've just noticed that the chunk in i386/kernel/head.S ended up in a
> > > weird place, namely, it's not going to be executed as it's just after
> > > a 'jmp 3f' and before startup_32_smp, probably not what you intended.
> > > on a sidenote, the whole thing can be done in a single insn, like:
> > >
> > > movl $(swapper_pg_pmd - __PAGE_OFFSET + 0x067), (swapper_pg_dir -
> > > __PAGE_OFFSET+ 4092)
> > >
> > > PS: your email address ebiderman@...sson.com in the commit seems to
> > > be wrong as well.
> >
> > Yes.  YH refresh one of my old patches and apparently got my email
> > address wrong.
> >
> > Thanks for the reminder I thought we had fixed this problem a while 
> > ago.
> 
> i sent fix to andrew and andi. but it seems they missed it.

ok, this one is now upstream, it's in -rc4:

 ------------->
 commit 17d57a9206b4de6ad082ac9f2d2346985abbd2aa
 Author: Eric W. Biederman <ebiederm@...ssion.com>
 Date:   Sat Dec 1 18:34:06 2007 -0700

     x86: fix x86-32 early fixmap initialization.

     pageexec@...email.hu writes:

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