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

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Message-ID: <20140715111237.GF7668@distanz.ch>
Date:	Tue, 15 Jul 2014 13:12:37 +0200
From:	Tobias Klauser <tklauser@...tanz.ch>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Ley Foon Tan <lftan@...era.com>, linux-arch@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
	lftan.linux@...il.com, cltang@...esourcery.com
Subject: Re: [PATCH v2 24/29] nios2: Module support

On 2014-07-15 at 12:24:46 +0200, Arnd Bergmann <arnd@...db.de> wrote:
> On Tuesday 15 July 2014 16:45:51 Ley Foon Tan wrote:
> > +void *module_alloc(unsigned long size)
> > +{
> > +	if (size == 0)
> > +		return NULL;
> > +	return kmalloc(size, GFP_KERNEL);
> > +}
> > +
> > +/* Free memory returned from module_alloc */
> > +void module_free(struct module *mod, void *module_region)
> > +{
> > +	kfree(module_region);
> > +}
> 
> Any particular reason for defining these to use kmalloc rather than
> the default vmalloc based functions?

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

Cheers
Tobias
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