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| Filename | /usr/src/linux-headers-3.13.0-24/arch/sh/include/asm/segment.h |
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| Create time | 27-Apr-2025 09:50 |
| Last modified | 20-Jan-2014 10:40 |
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#ifndef __ASM_SH_SEGMENT_H
#define __ASM_SH_SEGMENT_H
#ifndef __ASSEMBLY__
typedef struct {
unsigned long seg;
} mm_segment_t;
#define MAKE_MM_SEG(s) ((mm_segment_t) { (s) })
/*
* The fs value determines whether argument validity checking should be
* performed or not. If get_fs() == USER_DS, checking is performed, with
* get_fs() == KERNEL_DS, checking is bypassed.
*
* For historical reasons, these macros are grossly misnamed.
*/
#define KERNEL_DS MAKE_MM_SEG(0xFFFFFFFFUL)
#ifdef CONFIG_MMU
#define USER_DS MAKE_MM_SEG(PAGE_OFFSET)
#else
#define USER_DS KERNEL_DS
#endif
#define segment_eq(a,b) ((a).seg == (b).seg)
#define get_ds() (KERNEL_DS)
#define get_fs() (current_thread_info()->addr_limit)
#define set_fs(x) (current_thread_info()->addr_limit = (x))
#endif /* __ASSEMBLY__ */
#endif /* __ASM_SH_SEGMENT_H */
#define __ASM_SH_SEGMENT_H
#ifndef __ASSEMBLY__
typedef struct {
unsigned long seg;
} mm_segment_t;
#define MAKE_MM_SEG(s) ((mm_segment_t) { (s) })
/*
* The fs value determines whether argument validity checking should be
* performed or not. If get_fs() == USER_DS, checking is performed, with
* get_fs() == KERNEL_DS, checking is bypassed.
*
* For historical reasons, these macros are grossly misnamed.
*/
#define KERNEL_DS MAKE_MM_SEG(0xFFFFFFFFUL)
#ifdef CONFIG_MMU
#define USER_DS MAKE_MM_SEG(PAGE_OFFSET)
#else
#define USER_DS KERNEL_DS
#endif
#define segment_eq(a,b) ((a).seg == (b).seg)
#define get_ds() (KERNEL_DS)
#define get_fs() (current_thread_info()->addr_limit)
#define set_fs(x) (current_thread_info()->addr_limit = (x))
#endif /* __ASSEMBLY__ */
#endif /* __ASM_SH_SEGMENT_H */