linux-kernel - Re: [PATCH] mtd: allow mtd and jffs2 when ARCH=um

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Date:	Thu, 16 Dec 2010 23:01:10 +0100
From:	Anatolij Gustschin <agust@...x.de>
To:	Jason Lunz <lunz@....org>
Cc:	Artem Bityutskiy <dedekind1@...il.com>,
	atom ota <atomota@...epyhammer.com>,
	user-mode-linux-devel@...ts.sourceforge.net,
	richard -rw- weinberger <richard.weinberger@...il.com>,
	Sam Ravnborg <sam@...nborg.org>, Jeff Dike <jdike@...toit.com>,
	lkml <linux-kernel@...r.kernel.org>,
	linux-mtd@...ts.infradead.org, Rob Landley <rob@...dley.net>,
	David Woodhouse <dwmw2@...radead.org>
Subject: Re: [PATCH] mtd: allow mtd and jffs2 when ARCH=um

On Tue, 14 Dec 2010 11:51:24 -0800
Jason Lunz <lunz@....org> wrote:
...
> diff --git a/include/linux/mtd/map.h b/include/linux/mtd/map.h
> index a9e6ba4..3d9f7e0 100644
> --- a/include/linux/mtd/map.h
> +++ b/include/linux/mtd/map.h
> @@ -388,6 +388,15 @@ static inline map_word map_word_ff(struct map_info *map)
>  	return r;
>  }
>  
> +#ifdef CONFIG_MTD_COMPLEX_MAPPINGS
> +#define map_read(map, ofs) (map)->read(map, ofs)
> +#define map_copy_from(map, to, from, len) (map)->copy_from(map, to, from, len)
> +#define map_write(map, datum, ofs) (map)->write(map, datum, ofs)
> +#define map_copy_to(map, to, from, len) (map)->copy_to(map, to, from, len)
> +
> +extern void simple_map_init(struct map_info *);
> +#define map_is_linear(map) (map->phys != NO_XIP)
> +
>  static inline map_word inline_map_read(struct map_info *map, unsigned long ofs)
>  {
>  	map_word r;
> @@ -440,15 +449,6 @@ static inline void inline_map_copy_to(struct map_info *map, unsigned long to, co
>  	memcpy_toio(map->virt + to, from, len);
>  }
>  
> -#ifdef CONFIG_MTD_COMPLEX_MAPPINGS
> -#define map_read(map, ofs) (map)->read(map, ofs)
> -#define map_copy_from(map, to, from, len) (map)->copy_from(map, to, from, len)
> -#define map_write(map, datum, ofs) (map)->write(map, datum, ofs)
> -#define map_copy_to(map, to, from, len) (map)->copy_to(map, to, from, len)
> -
> -extern void simple_map_init(struct map_info *);
> -#define map_is_linear(map) (map->phys != NO_XIP)
> -
>  #else
>  #define map_read(map, ofs) inline_map_read(map, ofs)
>  #define map_copy_from(map, to, from, len) inline_map_copy_from(map, to, from, len)

This change breaks compiling when CONFIG_MTD_COMPLEX_MAPPINGS is not
defined in the kernel configuration. Please fix!

Thanks,
Anatolij

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