diff options
Diffstat (limited to 'include/linux/local_lock.h')
| -rw-r--r-- | include/linux/local_lock.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/include/linux/local_lock.h b/include/linux/local_lock.h index 091dc0b6bdfb..16a2ee4f8310 100644 --- a/include/linux/local_lock.h +++ b/include/linux/local_lock.h @@ -51,6 +51,34 @@ #define local_unlock_irqrestore(lock, flags) \ __local_unlock_irqrestore(lock, flags) +/** + * local_lock_init - Runtime initialize a lock instance + */ +#define local_trylock_init(lock) __local_trylock_init(lock) + +/** + * local_trylock - Try to acquire a per CPU local lock + * @lock: The lock variable + * + * The function can be used in any context such as NMI or HARDIRQ. Due to + * locking constrains it will _always_ fail to acquire the lock in NMI or + * HARDIRQ context on PREEMPT_RT. + */ +#define local_trylock(lock) __local_trylock(lock) + +/** + * local_trylock_irqsave - Try to acquire a per CPU local lock, save and disable + * interrupts if acquired + * @lock: The lock variable + * @flags: Storage for interrupt flags + * + * The function can be used in any context such as NMI or HARDIRQ. Due to + * locking constrains it will _always_ fail to acquire the lock in NMI or + * HARDIRQ context on PREEMPT_RT. + */ +#define local_trylock_irqsave(lock, flags) \ + __local_trylock_irqsave(lock, flags) + DEFINE_GUARD(local_lock, local_lock_t __percpu*, local_lock(_T), local_unlock(_T)) |