linux-kernel - Re: [PATCH v2 24/29] nios2: Module support

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Message-ID: <CAFiDJ5-Q4eKV1kT5dsQQshQ942GCD0BwC+y9+qbSWBT2dTacPw@mail.gmail.com>
Date:	Wed, 16 Jul 2014 09:36:14 +0800
From:	"LF.Tan" <lftan.linux@...il.com>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Tobias Klauser <tklauser@...tanz.ch>,
	Linux-Arch <linux-arch@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	Chung-Lin Tang <cltang@...esourcery.com>
Subject: Re: [PATCH v2 24/29] nios2: Module support

On Tue, Jul 15, 2014 at 8:21 PM, Arnd Bergmann <arnd@...db.de> wrote:

>>
>> AFAIR this is due to relocation issues, as the FIXME comment in the
>> "original" code [1] states. I don't know whether this still applies,
>> though (or what would be the proper fix for this to overcome the
>> relocation issues).
>>
>> [1] https://github.com/tklauser/linux-nios2/blob/nios2/arch/nios2/kernel/module.c#L45
>>
>
> Ah, I see. Please at least copy over that comment then.
Will copy over the comment.

>
> A long-term solution would be to copy what ARM does, since that
> has the same problem. The modules are allocated with
> __vmalloc_node_range, passing a virtual address range that
> is just before the kernel virtual address, taken out of the
> top 16MB of the user space addresses.
Noted, will investigate this for long-term solution.

Thanks.

Regards
Ley Foon
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