linux-kernel - Re: [PATCH 16/27] score: create head files scatterlist.h scoreregs.h sections.h segment.h sembuf.h setup.h shmbuf.h shmparam.h sigcontext.h siginfo.h signal.h socket.h sockios.h statfs.h stat.h string.h swab.h syscalls.h system.h

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Message-Id: <200906091939.01217.arnd@arndb.de>
Date:	Tue, 9 Jun 2009 19:39:01 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	liqin.chen@...plusct.com
Cc:	linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	torvalds@...ux-foundation.org
Subject: Re: [PATCH 16/27] score: create head files scatterlist.h scoreregs.h sections.h segment.h sembuf.h setup.h shmbuf.h shmparam.h sigcontext.h siginfo.h signal.h socket.h sockios.h statfs.h stat.h string.h swab.h syscalls.h system.h

On Tuesday 09 June 2009, liqin.chen@...plusct.com wrote:

> --- /dev/null
> +++ b/arch/score/include/asm/segment.h
> @@ -0,0 +1,21 @@
> +#ifndef _ASM_SCORE_SEGMENT_H
> +#define _ASM_SCORE_SEGMENT_H
> +
> +#ifndef __ASSEMBLY__
> +
> +typedef struct {
> +       unsigned long seg;
> +} mm_segment_t;
> +
> +#define KERNEL_DS      ((mm_segment_t){0})
> +#define USER_DS        KERNEL_DS
> +
> +# define get_ds()      (KERNEL_DS)
> +# define get_fs()      (current_thread_info()->addr_limit)
> +# define set_fs(x)     \
> +       do { current_thread_info()->addr_limit = (x); } while (0)
> +
> +# define segment_eq(a, b)      ((a).seg == (b).seg)
> +
> +# endif /* __ASSEMBLY__ */
> +#endif /* _ASM_SCORE_SEGMENT_H */

When I discussed these definitions with Michal Simek, we concluded
that they do not actually belong into segment.h. I added them to
asm-generic/uaccess.h, so if you can use that, you get them for free
and can have an empty segment.h file.

	Arnd <><
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