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- /* SPDX-License-Identifier: GPL-2.0 */
- #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 */
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