Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) #ifndef __ASM_SH_SEGMENT_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) #define __ASM_SH_SEGMENT_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) #ifndef __ASSEMBLY__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) typedef struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 	unsigned long seg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) } mm_segment_t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #define MAKE_MM_SEG(s)	((mm_segment_t) { (s) })
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)  * The fs value determines whether argument validity checking should be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)  * performed or not.  If get_fs() == USER_DS, checking is performed, with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)  * get_fs() == KERNEL_DS, checking is bypassed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)  * For historical reasons, these macros are grossly misnamed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define KERNEL_DS	MAKE_MM_SEG(0xFFFFFFFFUL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #ifdef CONFIG_MMU
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define USER_DS		MAKE_MM_SEG(PAGE_OFFSET)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #define USER_DS		KERNEL_DS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #define uaccess_kernel() (get_fs().seg == KERNEL_DS.seg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #define get_fs()	(current_thread_info()->addr_limit)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #define set_fs(x)	(current_thread_info()->addr_limit = (x))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #endif /* __ASSEMBLY__ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #endif /* __ASM_SH_SEGMENT_H */