diff options
Diffstat (limited to 'include/linux/local_lock.h')
| -rw-r--r-- | include/linux/local_lock.h | 65 |
1 files changed, 59 insertions, 6 deletions
diff --git a/include/linux/local_lock.h b/include/linux/local_lock.h index e55010fa7329..b0e6ab329b00 100644 --- a/include/linux/local_lock.h +++ b/include/linux/local_lock.h @@ -6,6 +6,7 @@ /** * local_lock_init - Runtime initialize a lock instance + * @lock: The lock variable */ #define local_lock_init(lock) __local_lock_init(lock) @@ -13,13 +14,13 @@ * local_lock - Acquire a per CPU local lock * @lock: The lock variable */ -#define local_lock(lock) __local_lock(lock) +#define local_lock(lock) __local_lock(this_cpu_ptr(lock)) /** * local_lock_irq - Acquire a per CPU local lock and disable interrupts * @lock: The lock variable */ -#define local_lock_irq(lock) __local_lock_irq(lock) +#define local_lock_irq(lock) __local_lock_irq(this_cpu_ptr(lock)) /** * local_lock_irqsave - Acquire a per CPU local lock, save and disable @@ -28,19 +29,19 @@ * @flags: Storage for interrupt flags */ #define local_lock_irqsave(lock, flags) \ - __local_lock_irqsave(lock, flags) + __local_lock_irqsave(this_cpu_ptr(lock), flags) /** * local_unlock - Release a per CPU local lock * @lock: The lock variable */ -#define local_unlock(lock) __local_unlock(lock) +#define local_unlock(lock) __local_unlock(this_cpu_ptr(lock)) /** * local_unlock_irq - Release a per CPU local lock and enable interrupts * @lock: The lock variable */ -#define local_unlock_irq(lock) __local_unlock_irq(lock) +#define local_unlock_irq(lock) __local_unlock_irq(this_cpu_ptr(lock)) /** * local_unlock_irqrestore - Release a per CPU local lock and restore @@ -49,6 +50,58 @@ * @flags: Interrupt flags to restore */ #define local_unlock_irqrestore(lock, flags) \ - __local_unlock_irqrestore(lock, flags) + __local_unlock_irqrestore(this_cpu_ptr(lock), flags) + +/** + * local_trylock_init - Runtime initialize a lock instance + * @lock: The lock variable + */ +#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(this_cpu_ptr(lock)) + +#define local_lock_is_locked(lock) __local_lock_is_locked(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(this_cpu_ptr(lock), flags) + +DEFINE_GUARD(local_lock, local_lock_t __percpu*, + local_lock(_T), + local_unlock(_T)) +DEFINE_GUARD(local_lock_irq, local_lock_t __percpu*, + local_lock_irq(_T), + local_unlock_irq(_T)) +DEFINE_LOCK_GUARD_1(local_lock_irqsave, local_lock_t __percpu, + local_lock_irqsave(_T->lock, _T->flags), + local_unlock_irqrestore(_T->lock, _T->flags), + unsigned long flags) + +#define local_lock_nested_bh(_lock) \ + __local_lock_nested_bh(this_cpu_ptr(_lock)) + +#define local_unlock_nested_bh(_lock) \ + __local_unlock_nested_bh(this_cpu_ptr(_lock)) + +DEFINE_GUARD(local_lock_nested_bh, local_lock_t __percpu*, + local_lock_nested_bh(_T), + local_unlock_nested_bh(_T)) #endif |