1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
|
/* 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 */
|
