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| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2017-06-02 17:49:10 -0700 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2017-06-02 17:49:10 -0700 |
| commit | eadcbfa58ae8693f0d6a0f591d8f51d55cf068e1 (patch) | |
| tree | cff3f1c56a8bf15138b652ee9dab50dddd6edee5 /include/linux/atomic.h | |
| parent | c4beedb8a914af9c8c1b6e67c753adf411e05160 (diff) | |
| parent | 5ed02dbb497422bf225783f46e6eadd237d23d6b (diff) | |
Merge tag 'v4.12-rc3' into for-linus
Merge with mainline to get acpi_dev_present() needed by patches to
axp20x-pek driver.
Diffstat (limited to 'include/linux/atomic.h')
| -rw-r--r-- | include/linux/atomic.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/include/linux/atomic.h b/include/linux/atomic.h index e71835bf60a9..c56be7410130 100644 --- a/include/linux/atomic.h +++ b/include/linux/atomic.h @@ -423,6 +423,29 @@ #endif #endif /* atomic_cmpxchg_relaxed */ +#ifndef atomic_try_cmpxchg + +#define __atomic_try_cmpxchg(type, _p, _po, _n) \ +({ \ + typeof(_po) __po = (_po); \ + typeof(*(_po)) __r, __o = *__po; \ + __r = atomic_cmpxchg##type((_p), __o, (_n)); \ + if (unlikely(__r != __o)) \ + *__po = __r; \ + likely(__r == __o); \ +}) + +#define atomic_try_cmpxchg(_p, _po, _n) __atomic_try_cmpxchg(, _p, _po, _n) +#define atomic_try_cmpxchg_relaxed(_p, _po, _n) __atomic_try_cmpxchg(_relaxed, _p, _po, _n) +#define atomic_try_cmpxchg_acquire(_p, _po, _n) __atomic_try_cmpxchg(_acquire, _p, _po, _n) +#define atomic_try_cmpxchg_release(_p, _po, _n) __atomic_try_cmpxchg(_release, _p, _po, _n) + +#else /* atomic_try_cmpxchg */ +#define atomic_try_cmpxchg_relaxed atomic_try_cmpxchg +#define atomic_try_cmpxchg_acquire atomic_try_cmpxchg +#define atomic_try_cmpxchg_release atomic_try_cmpxchg +#endif /* atomic_try_cmpxchg */ + /* cmpxchg_relaxed */ #ifndef cmpxchg_relaxed #define cmpxchg_relaxed cmpxchg @@ -996,6 +1019,29 @@ static inline int atomic_dec_if_positive(atomic_t *v) #endif #endif /* atomic64_cmpxchg_relaxed */ +#ifndef atomic64_try_cmpxchg + +#define __atomic64_try_cmpxchg(type, _p, _po, _n) \ +({ \ + typeof(_po) __po = (_po); \ + typeof(*(_po)) __r, __o = *__po; \ + __r = atomic64_cmpxchg##type((_p), __o, (_n)); \ + if (unlikely(__r != __o)) \ + *__po = __r; \ + likely(__r == __o); \ +}) + +#define atomic64_try_cmpxchg(_p, _po, _n) __atomic64_try_cmpxchg(, _p, _po, _n) +#define atomic64_try_cmpxchg_relaxed(_p, _po, _n) __atomic64_try_cmpxchg(_relaxed, _p, _po, _n) +#define atomic64_try_cmpxchg_acquire(_p, _po, _n) __atomic64_try_cmpxchg(_acquire, _p, _po, _n) +#define atomic64_try_cmpxchg_release(_p, _po, _n) __atomic64_try_cmpxchg(_release, _p, _po, _n) + +#else /* atomic64_try_cmpxchg */ +#define atomic64_try_cmpxchg_relaxed atomic64_try_cmpxchg +#define atomic64_try_cmpxchg_acquire atomic64_try_cmpxchg +#define atomic64_try_cmpxchg_release atomic64_try_cmpxchg +#endif /* atomic64_try_cmpxchg */ + #ifndef atomic64_andnot static inline void atomic64_andnot(long long i, atomic64_t *v) { |