[mirror_ubuntu-bionic-kernel.git] / arch / sh / include / asm / segment.h

/* 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 */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1da177e4 LT	2	#ifndef __ASM_SH_SEGMENT_H
	3	#define __ASM_SH_SEGMENT_H
	4
02f7e627	5	#ifndef __ASSEMBLY__
1da177e4	6
02f7e627 PM	7	typedef struct {
	8	unsigned long seg;
	9	} mm_segment_t;
	10
	11	#define MAKE_MM_SEG(s) ((mm_segment_t) { (s) })
	12
	13	/*
	14	* The fs value determines whether argument validity checking should be
	15	* performed or not. If get_fs() == USER_DS, checking is performed, with
	16	* get_fs() == KERNEL_DS, checking is bypassed.
	17	*
	18	* For historical reasons, these macros are grossly misnamed.
	19	*/
	20	#define KERNEL_DS MAKE_MM_SEG(0xFFFFFFFFUL)
	21	#ifdef CONFIG_MMU
	22	#define USER_DS MAKE_MM_SEG(PAGE_OFFSET)
	23	#else
	24	#define USER_DS KERNEL_DS
	25	#endif
	26
3237f28e	27	#define segment_eq(a, b) ((a).seg == (b).seg)
02f7e627 PM	28
	29	#define get_ds() (KERNEL_DS)
	30
	31	#define get_fs() (current_thread_info()->addr_limit)
	32	#define set_fs(x) (current_thread_info()->addr_limit = (x))
	33
	34	#endif /* __ASSEMBLY__ */
1da177e4	35	#endif /* __ASM_SH_SEGMENT_H */