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a5d6f6020a
The use of these functions was added with the recent atomic work and not tested on 32-bit systems. Add the missing compat functions: atomic64_inc, atomic64_dec, atomic64_add_return, atomic64_sub_return, atomic64_inc_return, atomic64_dec_return.
100 lines
1.9 KiB
C
100 lines
1.9 KiB
C
#ifndef _SPL_ATOMIC_COMPAT_H
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#define _SPL_ATOMIC_COMPAT_H
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#include <asm/atomic.h>
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#include <spl_config.h>
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#ifndef HAVE_ATOMIC64_T
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#include <linux/spinlock.h>
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typedef struct {
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spinlock_t lock;
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__s64 val;
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} atomic64_t;
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#define ATOMIC64_INIT(i) { .lock = SPIN_LOCK_UNLOCKED, .val = (i) }
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static inline void atomic64_add(__s64 i, atomic64_t *v)
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{
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unsigned long flags;
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spin_lock_irqsave(&v->lock, flags);
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v->val += i;
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spin_unlock_irqrestore(&v->lock, flags);
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}
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static inline void atomic64_sub(__s64 i, atomic64_t *v)
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{
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unsigned long flags;
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spin_lock_irqsave(&v->lock, flags);
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v->val -= i;
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spin_unlock_irqrestore(&v->lock, flags);
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}
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#define atomic64_inc(v) (atomic64_add(1, (v)))
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#define atomic64_dec(v) (atomic64_sub(1, (v)))
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static inline __s64 atomic64_add_return(__s64 i, atomic64_t *v)
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{
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unsigned long flags;
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__s64 ret;
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spin_lock_irqsave(&v->lock, flags);
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v->val += i;
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ret = v->val;
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spin_unlock_irqrestore(&v->lock, flags);
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return ret;
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}
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static inline __s64 atomic64_sub_return(__s64 i, atomic64_t *v)
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{
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unsigned long flags;
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__s64 ret;
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spin_lock_irqsave(&v->lock, flags);
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v->val -= i;
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ret = v->val;
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spin_unlock_irqrestore(&v->lock, flags);
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return ret;
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}
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#define atomic64_inc_return(v) (atomic64_add_return(1, (v)))
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#define atomic64_dec_return(v) (atomic64_sub_return(1, (v)))
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static inline __s64 atomic64_read(atomic64_t *v)
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{
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unsigned long flags;
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__s64 r;
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spin_lock_irqsave(&v->lock, flags);
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r = v->val;
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spin_unlock_irqrestore(&v->lock, flags);
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return r;
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}
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static inline void atomic64_set(atomic64_t *v, __s64 i)
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{
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unsigned long flags;
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spin_lock_irqsave(&v->lock, flags);
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v->val = i;
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spin_unlock_irqrestore(&v->lock, flags);
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}
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#endif /* HAVE_ATOMIC64_T */
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#ifndef HAVE_ATOMIC64_CMPXCHG
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#define atomic64_cmpxchg(v, o, n) (cmpxchg(&((v)->counter), (o), (n)))
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#endif
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#ifndef HAVE_ATOMIC64_XCHG
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#define atomic64_xchg(v, n) (xchg(&((v)->counter), n))
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#endif
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#endif /* _SPL_ATOMIC_COMPAT_H */
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