Cregit: Linux 6.7: qrwlock

Contributors: 5
Author	Tokens	Token Proportion	Commits	Commit Proportion
Waiman Long	36	50.00%	3	37.50%
Will Deacon	31	43.06%	2	25.00%
Arnd Bergmann	3	4.17%	1	12.50%
Greg Kroah-Hartman	1	1.39%	1	12.50%
Davidlohr Bueso A	1	1.39%	1	12.50%
Total	72		8

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_GENERIC_QRWLOCK_TYPES_H
#define __ASM_GENERIC_QRWLOCK_TYPES_H

#include <linux/types.h>
#include <asm/byteorder.h>
#include <asm/spinlock_types.h>

/*
 * The queued read/write lock data structure
 */

typedef struct qrwlock {
	union {
		atomic_t cnts;
		struct {
#ifdef __LITTLE_ENDIAN
			u8 wlocked;	/* Locked for write? */
			u8 __lstate[3];
#else
			u8 __lstate[3];
			u8 wlocked;	/* Locked for write? */
#endif
		};
	};
	arch_spinlock_t		wait_lock;
} arch_rwlock_t;

#define	__ARCH_RW_LOCK_UNLOCKED {		\
	{ .cnts = ATOMIC_INIT(0), },		\
	.wait_lock = __ARCH_SPIN_LOCK_UNLOCKED,	\
}

#endif /* __ASM_GENERIC_QRWLOCK_TYPES_H */

qrwlock_types.h