1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */
270af2f8aSWaiman Long #ifndef __ASM_GENERIC_QRWLOCK_TYPES_H
370af2f8aSWaiman Long #define __ASM_GENERIC_QRWLOCK_TYPES_H
470af2f8aSWaiman Long 
570af2f8aSWaiman Long #include <linux/types.h>
6ca66e797SArnd Bergmann #include <asm/byteorder.h>
770af2f8aSWaiman Long #include <asm/spinlock_types.h>
870af2f8aSWaiman Long 
970af2f8aSWaiman Long /*
10*434e09e7SWaiman Long  * The queued read/write lock data structure
1170af2f8aSWaiman Long  */
1270af2f8aSWaiman Long 
1370af2f8aSWaiman Long typedef struct qrwlock {
14e0d02285SWill Deacon 	union {
1570af2f8aSWaiman Long 		atomic_t cnts;
16e0d02285SWill Deacon 		struct {
17e0d02285SWill Deacon #ifdef __LITTLE_ENDIAN
18d1331661SWill Deacon 			u8 wlocked;	/* Locked for write? */
19d1331661SWill Deacon 			u8 __lstate[3];
20e0d02285SWill Deacon #else
21d1331661SWill Deacon 			u8 __lstate[3];
22d1331661SWill Deacon 			u8 wlocked;	/* Locked for write? */
23e0d02285SWill Deacon #endif
24e0d02285SWill Deacon 		};
25e0d02285SWill Deacon 	};
266e1e5196SDavidlohr Bueso 	arch_spinlock_t		wait_lock;
2770af2f8aSWaiman Long } arch_rwlock_t;
2870af2f8aSWaiman Long 
2970af2f8aSWaiman Long #define	__ARCH_RW_LOCK_UNLOCKED {		\
30e0d02285SWill Deacon 	{ .cnts = ATOMIC_INIT(0), },		\
316e1e5196SDavidlohr Bueso 	.wait_lock = __ARCH_SPIN_LOCK_UNLOCKED,	\
3270af2f8aSWaiman Long }
3370af2f8aSWaiman Long 
3470af2f8aSWaiman Long #endif /* __ASM_GENERIC_QRWLOCK_TYPES_H */
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