| * atomic32.c: 32-bit atomic_t implementation |
| * Copyright (C) 2004 Keith M Wesolowski |
| * Based on asm-parisc/atomic.h Copyright (C) 2000 Philipp Rumpf |
| #include <linux/spinlock.h> |
| #include <linux/module.h> |
| #define ATOMIC_HASH_SIZE 4 |
| #define ATOMIC_HASH(a) (&__atomic_hash[(((unsigned long)a)>>8) & (ATOMIC_HASH_SIZE-1)]) |
| spinlock_t __atomic_hash[ATOMIC_HASH_SIZE] = { |
| [0 ... (ATOMIC_HASH_SIZE-1)] = SPIN_LOCK_UNLOCKED |
| static DEFINE_SPINLOCK(dummy); |
| #define ATOMIC_HASH_SIZE 1 |
| #define ATOMIC_HASH(a) (&dummy) |
| int __atomic_add_return(int i, atomic_t *v) |
| spin_lock_irqsave(ATOMIC_HASH(v), flags); |
| spin_unlock_irqrestore(ATOMIC_HASH(v), flags); |
| void atomic_set(atomic_t *v, int i) |
| spin_lock_irqsave(ATOMIC_HASH(v), flags); |
| spin_unlock_irqrestore(ATOMIC_HASH(v), flags); |
| EXPORT_SYMBOL(__atomic_add_return); |
| EXPORT_SYMBOL(atomic_set); |