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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/linux/rwlock_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/linux/rwlock_types.h')
-rw-r--r-- | include/linux/rwlock_types.h | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/include/linux/rwlock_types.h b/include/linux/rwlock_types.h new file mode 100644 index 000000000..1948442e7 --- /dev/null +++ b/include/linux/rwlock_types.h @@ -0,0 +1,78 @@ +#ifndef __LINUX_RWLOCK_TYPES_H +#define __LINUX_RWLOCK_TYPES_H + +#if !defined(__LINUX_SPINLOCK_TYPES_H) +# error "Do not include directly, include spinlock_types.h" +#endif + +#ifdef CONFIG_DEBUG_LOCK_ALLOC +# define RW_DEP_MAP_INIT(lockname) \ + .dep_map = { \ + .name = #lockname, \ + .wait_type_inner = LD_WAIT_CONFIG, \ + } +#else +# define RW_DEP_MAP_INIT(lockname) +#endif + +#ifndef CONFIG_PREEMPT_RT +/* + * generic rwlock type definitions and initializers + * + * portions Copyright 2005, Red Hat, Inc., Ingo Molnar + * Released under the General Public License (GPL). + */ +typedef struct { + arch_rwlock_t raw_lock; +#ifdef CONFIG_DEBUG_SPINLOCK + unsigned int magic, owner_cpu; + void *owner; +#endif +#ifdef CONFIG_DEBUG_LOCK_ALLOC + struct lockdep_map dep_map; +#endif +} rwlock_t; + +#define RWLOCK_MAGIC 0xdeaf1eed + +#ifdef CONFIG_DEBUG_SPINLOCK +#define __RW_LOCK_UNLOCKED(lockname) \ + (rwlock_t) { .raw_lock = __ARCH_RW_LOCK_UNLOCKED, \ + .magic = RWLOCK_MAGIC, \ + .owner = SPINLOCK_OWNER_INIT, \ + .owner_cpu = -1, \ + RW_DEP_MAP_INIT(lockname) } +#else +#define __RW_LOCK_UNLOCKED(lockname) \ + (rwlock_t) { .raw_lock = __ARCH_RW_LOCK_UNLOCKED, \ + RW_DEP_MAP_INIT(lockname) } +#endif + +#define DEFINE_RWLOCK(x) rwlock_t x = __RW_LOCK_UNLOCKED(x) + +#else /* !CONFIG_PREEMPT_RT */ + +#include <linux/rwbase_rt.h> + +typedef struct { + struct rwbase_rt rwbase; + atomic_t readers; +#ifdef CONFIG_DEBUG_LOCK_ALLOC + struct lockdep_map dep_map; +#endif +} rwlock_t; + +#define __RWLOCK_RT_INITIALIZER(name) \ +{ \ + .rwbase = __RWBASE_INITIALIZER(name), \ + RW_DEP_MAP_INIT(name) \ +} + +#define __RW_LOCK_UNLOCKED(name) __RWLOCK_RT_INITIALIZER(name) + +#define DEFINE_RWLOCK(name) \ + rwlock_t name = __RW_LOCK_UNLOCKED(name) + +#endif /* CONFIG_PREEMPT_RT */ + +#endif /* __LINUX_RWLOCK_TYPES_H */ |