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scst, percpu_ref backport: For older kernels, use atomic instead of atomic_long (merge r9030 from trunk)

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git-svn-id: http://svn.code.sf.net/p/scst/svn/branches/3.4.x@9201 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This commit is contained in:
Bart Van Assche
2020-12-03 03:32:32 +00:00
parent a2d594c890
commit ae7eb0c978
1 changed files with 5 additions and 5 deletions
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10
scst/include/backport.h
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@@ -1091,7 +1091,7 @@ struct percpu_ref;
typedef void (percpu_ref_func_t)(struct percpu_ref *);
struct percpu_ref {
atomic_long_t count;
atomic_t count;
percpu_ref_func_t *release;
};
@@ -1100,7 +1100,7 @@ static inline int __must_check percpu_ref_init(struct percpu_ref *ref,
gfp_t gfp)
{
WARN_ON_ONCE(flags != 0);
atomic_long_set(&ref->count, 1);
atomic_set(&ref->count, 1);
ref->release = release;
return 0;
}
@@ -1111,12 +1111,12 @@ static inline void percpu_ref_exit(struct percpu_ref *ref)
static inline void percpu_ref_get(struct percpu_ref *ref)
{
atomic_long_inc(&ref->count);
atomic_inc(&ref->count);
}
static inline void percpu_ref_put(struct percpu_ref *ref)
{
if (unlikely(atomic_long_dec_and_test(&ref->count)))
if (unlikely(atomic_dec_and_test(&ref->count)))
ref->release(ref);
}
@@ -1127,7 +1127,7 @@ static inline void percpu_ref_kill(struct percpu_ref *ref)
static inline bool percpu_ref_is_zero(struct percpu_ref *ref)
{
return !atomic_long_read(&ref->count);
return !atomic_read(&ref->count);
}
#endif