diff options
Diffstat (limited to 'lib/atomic64.c')
| -rw-r--r-- | lib/atomic64.c | 89 |
1 files changed, 41 insertions, 48 deletions
diff --git a/lib/atomic64.c b/lib/atomic64.c index 8bee16ec752..08a4f068e61 100644 --- a/lib/atomic64.c +++ b/lib/atomic64.c @@ -13,8 +13,8 @@ #include <linux/cache.h> #include <linux/spinlock.h> #include <linux/init.h> -#include <linux/module.h> -#include <asm/atomic.h> +#include <linux/export.h> +#include <linux/atomic.h> /* * We use a hashed array of spinlocks to provide exclusive access @@ -29,11 +29,15 @@ * Ensure each lock is in a separate cacheline. */ static union { - spinlock_t lock; + raw_spinlock_t lock; char pad[L1_CACHE_BYTES]; -} atomic64_lock[NR_LOCKS] __cacheline_aligned_in_smp; +} atomic64_lock[NR_LOCKS] __cacheline_aligned_in_smp = { + [0 ... (NR_LOCKS - 1)] = { + .lock = __RAW_SPIN_LOCK_UNLOCKED(atomic64_lock.lock), + }, +}; -static inline spinlock_t *lock_addr(const atomic64_t *v) +static inline raw_spinlock_t *lock_addr(const atomic64_t *v) { unsigned long addr = (unsigned long) v; @@ -45,12 +49,12 @@ static inline spinlock_t *lock_addr(const atomic64_t *v) long long atomic64_read(const atomic64_t *v) { unsigned long flags; - spinlock_t *lock = lock_addr(v); + raw_spinlock_t *lock = lock_addr(v); long long val; - spin_lock_irqsave(lock, flags); + raw_spin_lock_irqsave(lock, flags); val = v->counter; - spin_unlock_irqrestore(lock, flags); + raw_spin_unlock_irqrestore(lock, flags); return val; } EXPORT_SYMBOL(atomic64_read); @@ -58,34 +62,34 @@ EXPORT_SYMBOL(atomic64_read); void atomic64_set(atomic64_t *v, long long i) { unsigned long flags; - spinlock_t *lock = lock_addr(v); + raw_spinlock_t *lock = lock_addr(v); - spin_lock_irqsave(lock, flags); + raw_spin_lock_irqsave(lock, flags); v->counter = i; - spin_unlock_irqrestore(lock, flags); + raw_spin_unlock_irqrestore(lock, flags); } EXPORT_SYMBOL(atomic64_set); void atomic64_add(long long a, atomic64_t *v) { unsigned long flags; - spinlock_t *lock = lock_addr(v); + raw_spinlock_t *lock = lock_addr(v); - spin_lock_irqsave(lock, flags); + raw_spin_lock_irqsave(lock, flags); v->counter += a; - spin_unlock_irqrestore(lock, flags); + raw_spin_unlock_irqrestore(lock, flags); } EXPORT_SYMBOL(atomic64_add); long long atomic64_add_return(long long a, atomic64_t *v) { unsigned long flags; - spinlock_t *lock = lock_addr(v); + raw_spinlock_t *lock = lock_addr(v); long long val; - spin_lock_irqsave(lock, flags); + raw_spin_lock_irqsave(lock, flags); val = v->counter += a; - spin_unlock_irqrestore(lock, flags); + raw_spin_unlock_irqrestore(lock, flags); return val; } EXPORT_SYMBOL(atomic64_add_return); @@ -93,23 +97,23 @@ EXPORT_SYMBOL(atomic64_add_return); void atomic64_sub(long long a, atomic64_t *v) { unsigned long flags; - spinlock_t *lock = lock_addr(v); + raw_spinlock_t *lock = lock_addr(v); - spin_lock_irqsave(lock, flags); + raw_spin_lock_irqsave(lock, flags); v->counter -= a; - spin_unlock_irqrestore(lock, flags); + raw_spin_unlock_irqrestore(lock, flags); } EXPORT_SYMBOL(atomic64_sub); long long atomic64_sub_return(long long a, atomic64_t *v) { unsigned long flags; - spinlock_t *lock = lock_addr(v); + raw_spinlock_t *lock = lock_addr(v); long long val; - spin_lock_irqsave(lock, flags); + raw_spin_lock_irqsave(lock, flags); val = v->counter -= a; - spin_unlock_irqrestore(lock, flags); + raw_spin_unlock_irqrestore(lock, flags); return val; } EXPORT_SYMBOL(atomic64_sub_return); @@ -117,14 +121,14 @@ EXPORT_SYMBOL(atomic64_sub_return); long long atomic64_dec_if_positive(atomic64_t *v) { unsigned long flags; - spinlock_t *lock = lock_addr(v); + raw_spinlock_t *lock = lock_addr(v); long long val; - spin_lock_irqsave(lock, flags); + raw_spin_lock_irqsave(lock, flags); val = v->counter - 1; if (val >= 0) v->counter = val; - spin_unlock_irqrestore(lock, flags); + raw_spin_unlock_irqrestore(lock, flags); return val; } EXPORT_SYMBOL(atomic64_dec_if_positive); @@ -132,14 +136,14 @@ EXPORT_SYMBOL(atomic64_dec_if_positive); long long atomic64_cmpxchg(atomic64_t *v, long long o, long long n) { unsigned long flags; - spinlock_t *lock = lock_addr(v); + raw_spinlock_t *lock = lock_addr(v); long long val; - spin_lock_irqsave(lock, flags); + raw_spin_lock_irqsave(lock, flags); val = v->counter; if (val == o) v->counter = n; - spin_unlock_irqrestore(lock, flags); + raw_spin_unlock_irqrestore(lock, flags); return val; } EXPORT_SYMBOL(atomic64_cmpxchg); @@ -147,13 +151,13 @@ EXPORT_SYMBOL(atomic64_cmpxchg); long long atomic64_xchg(atomic64_t *v, long long new) { unsigned long flags; - spinlock_t *lock = lock_addr(v); + raw_spinlock_t *lock = lock_addr(v); long long val; - spin_lock_irqsave(lock, flags); + raw_spin_lock_irqsave(lock, flags); val = v->counter; v->counter = new; - spin_unlock_irqrestore(lock, flags); + raw_spin_unlock_irqrestore(lock, flags); return val; } EXPORT_SYMBOL(atomic64_xchg); @@ -161,26 +165,15 @@ EXPORT_SYMBOL(atomic64_xchg); int atomic64_add_unless(atomic64_t *v, long long a, long long u) { unsigned long flags; - spinlock_t *lock = lock_addr(v); - int ret = 1; + raw_spinlock_t *lock = lock_addr(v); + int ret = 0; - spin_lock_irqsave(lock, flags); + raw_spin_lock_irqsave(lock, flags); if (v->counter != u) { v->counter += a; - ret = 0; + ret = 1; } - spin_unlock_irqrestore(lock, flags); + raw_spin_unlock_irqrestore(lock, flags); return ret; } EXPORT_SYMBOL(atomic64_add_unless); - -static int init_atomic64_lock(void) -{ - int i; - - for (i = 0; i < NR_LOCKS; ++i) - spin_lock_init(&atomic64_lock[i].lock); - return 0; -} - -pure_initcall(init_atomic64_lock); |