linux-kernel - Re: [PATCH 47/56] microblaze_v2: device.h param.h topology.h

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Date:	Mon, 5 May 2008 00:37:23 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	monstr@...nam.cz
Cc:	linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
	stephen.neuendorffer@...inx.com, John.Linn@...inx.com,
	john.williams@...alogix.com, matthew@....cx, will.newton@...il.com,
	drepper@...hat.com, microblaze-uclinux@...e.uq.edu.au,
	grant.likely@...retlab.ca, Michal Simek <monstr@...str.eu>
Subject: Re: [PATCH 47/56] microblaze_v2: device.h param.h topology.h

On Sunday 04 May 2008, monstr@...nam.cz wrote:

> +#ifndef _ASM_MICROBLAZE_DEVICE_H
> +#define _ASM_MICROBLAZE_DEVICE_H
> +
> +struct dma_mapping_ops;
> +struct device_node;
> +
> +struct dev_archdata {
> +	/* Optional pointer to an OF device node */
> +	struct device_node	*of_node;
> +
> +	/* DMA operations on that device */
> +	struct dma_mapping_ops	*dma_ops;
> +	void			*dma_data;
> +
> +	/* NUMA node if applicable */
> +	int			numa_node;
> +};

microblaze doesn't have NUMA or dma_mapping_ops, afaict, so it should
just be

struct dev_archdata {
	/* Optional pointer to an OF device node */
	struct device_node	*of_node;
};

> --- /dev/null
> +++ b/include/asm-microblaze/param.h
> @@ -0,0 +1,36 @@
> +/*
> + * include/asm-microblaze/param.h
> + *
> + * This file is subject to the terms and conditions of the GNU General Public
> + * License. See the file "COPYING" in the main directory of this archive
> + * for more details.
> + *
> + * Copyright (C) 2006 Atmark Techno, Inc.
> + */
> +
> +#ifndef _ASM_MICROBLAZE_PARAM_H
> +#define _ASM_MICROBLAZE_PARAM_H
> +
> +#ifdef __KERNEL__
> +# define HZ		100 /* internal timer frequency */
> +# define USER_HZ	100 /* for user interfaces in "ticks" */
> +# define CLOCKS_PER_SEC (USER_HZ) /* frequnzy at which times() counts */
> +#endif
> +
> +#ifndef NGROUPS
> +#define NGROUPS		32
> +#endif
> +
> +#ifndef NOGROUP
> +#define NOGROUP		(-1)
> +#endif
> +
> +#define EXEC_PAGESIZE	4096
> +
> +#ifndef HZ
> +#define HZ 100
> +#endif
> +
> +#define MAXHOSTNAMELEN	64 /* max length of hostname */
> +
> +#endif /* _ASM_MICROBLAZE_PARAM_H */

These parameters are so common that they should become asm-generic/param.h.
4kb page size is of course a HW feature, but it's so universal that it's almost
a natural constant ;-)

> --- /dev/null
> +++ b/include/asm-microblaze/topology.h
> @@ -0,0 +1,119 @@
> +/*
> + * include/asm-microblaze/topology.h

please use the existing asm-generic/topology.h here.

	Arnd <><
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