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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /include/asm-generic/qrwlock_types.h | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'include/asm-generic/qrwlock_types.h')
-rw-r--r-- | include/asm-generic/qrwlock_types.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/include/asm-generic/qrwlock_types.h b/include/asm-generic/qrwlock_types.h new file mode 100644 index 000000000..12392c14c --- /dev/null +++ b/include/asm-generic/qrwlock_types.h @@ -0,0 +1,34 @@ +/* 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 */ |