| /* 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_fs() (current_thread_info()->addr_limit) |
| #define set_fs(x) (current_thread_info()->addr_limit = (x)) |
| |
| #endif /* __ASSEMBLY__ */ |
| #endif /* __ASM_SH_SEGMENT_H */ |
