| #include <linux/spinlock.h> |
| #include <linux/module.h> |
| |
| #if !((LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,31)) && (defined(CONFIG_UML) || defined(CONFIG_X86))) && !((LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,33)) && defined(CONFIG_ARM) && !defined(CONFIG_GENERIC_ATOMIC64)) |
| |
| static DEFINE_SPINLOCK(lock); |
| |
| long long atomic64_read(const atomic64_t *v) |
| { |
| unsigned long flags; |
| long long val; |
| |
| spin_lock_irqsave(&lock, flags); |
| val = v->counter; |
| spin_unlock_irqrestore(&lock, flags); |
| return val; |
| } |
| EXPORT_SYMBOL_GPL(atomic64_read); |
| |
| long long atomic64_add_return(long long a, atomic64_t *v) |
| { |
| unsigned long flags; |
| long long val; |
| |
| spin_lock_irqsave(&lock, flags); |
| val = v->counter += a; |
| spin_unlock_irqrestore(&lock, flags); |
| return val; |
| } |
| EXPORT_SYMBOL_GPL(atomic64_add_return); |
| |
| #endif |
| |
