linux-kernel - Re: [PATCH 1/2] Add /sys/firmware/memmap

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Message-ID: <20080626101526.780af0c0@halley.suse.de>
Date:	Thu, 26 Jun 2008 10:15:26 +0200
From:	Bernhard Walle <bwalle@...e.de>
To:	Vivek Goyal <vgoyal@...hat.com>
Cc:	x86@...nel.org, linux-kernel@...r.kernel.org,
	kexec@...ts.infradead.org, yhlu.kernel@...il.com
Subject: Re: [PATCH 1/2] Add /sys/firmware/memmap

* Vivek Goyal [2008-06-25 18:43]:
>
> Thanks for the patch. Couple of thoughts.
> 
> Do we really need another CONFIG option (CONFIG_FIRMWARE_MEMMAP)? To,
> me this does not seem to be a big chunk of code at the same time I am
> assuming that most of the people will use it (because of kexec). So
> probably, it might not make lot of sense to put additional CONFIG option.

Agreed.

> [..]
> > +#include <linux/string.h>
> > +#include <linux/firmware-map.h>
> > +#include <linux/kernel.h>
> > +#include <linux/module.h>
> > +#include <linux/types.h>
> > +#include <linux/bootmem.h>
> > +
> > +/*
> > + * String representation of enum firmware_map_type from
> > + * <linux/firmware-map.h>.
> > + */
> > +const char *type_to_string_map[] = {
> > +	"RAM",				/* MAP_RAM */
> > +	"Reserved",			/* MAP_RESERVED */
> > +	"ACPI Tables",			/* MAP_ACPI */
> > +	"Non-volatile Storage",		/* MAP_NVS */
> > +};
> > +
> 
> How about leaving the decision of memory type on arch dependent code? How
> about letting arch code pass you an string while adding entry and that
> string will contain the type of memory. The way request_resource() is
> implemented. 

Also agreed, see the resent patch.


Bernhard
-- 
Bernhard Walle, SUSE LINUX Products GmbH, Architecture Development
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