/* segment.h: MMU segment settings * * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #ifndef _ASM_SEGMENT_H#define _ASM_SEGMENT_H  #ifndef __ASSEMBLY__ typedef struct {	unsigned long seg;} mm_segment_t; #define MAKE_MM_SEG(s)	((mm_segment_t) { (s) }) #define KERNEL_DS		MAKE_MM_SEG(0xdfffffffUL) #ifdef CONFIG_MMU#define USER_DS			MAKE_MM_SEG(TASK_SIZE - 1)#else#define USER_DS			KERNEL_DS#endif #define get_ds()		(KERNEL_DS)#define get_fs()		(__current_thread_info->addr_limit)#define segment_eq(a,b)		((a).seg == (b).seg)#define __kernel_ds_p()		segment_eq(get_fs(), KERNEL_DS)#define get_addr_limit()	(get_fs().seg) #define set_fs(_x)					\do {							\	__current_thread_info->addr_limit = (_x);	\} while(0)  #endif /* __ASSEMBLY__ */#endif /* _ASM_SEGMENT_H */