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

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Date:	Sat, 01 Dec 2007 19:32:29 -0700
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	"Yinghai Lu" <yhlu.kernel@...il.com>
Cc:	"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> writes:

> 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.

Well hopefully the new arch/x86 maintainers can pick up a simple bug fix.
Hopefully this code has not bit-rotted yet.

> BTW: how about your head32.c patch series.

I think it is a wonderful idea ;)

Right now I'm buried in the namespace work.

I am seeing my todo list shrink visibly on that day by day, but it is
still a mighty list.

Hopefully that list will won't include any patches that just need refreshing
and merging by the time 2.6.25 rolls around...

Eric
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