diff options
| author | Kent Overstreet <kent.overstreet@linux.dev> | 2024-06-03 17:03:54 -0400 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2024-06-03 20:08:06 -0400 |
| commit | 7d79fba1af3d41b148009d3dc76d813b07f01f69 (patch) | |
| tree | bee9ba49d247a1c74d1c1e7c9c14b37a243bba89 /include | |
| parent | d456f9e97aebe649a59cc2858d5f28749b77d1d0 (diff) | |
Update bcachefs sources to f81dc88f0c80 bcachefs: bch2_btree_insert() - add btree iter flags
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/atomic.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/include/linux/atomic.h b/include/linux/atomic.h index 5313f850..73024023 100644 --- a/include/linux/atomic.h +++ b/include/linux/atomic.h @@ -41,6 +41,17 @@ typedef struct { #define cmpxchg_acquire(p, old, new) uatomic_cmpxchg(p, old, new) #define cmpxchg_release(p, old, new) uatomic_cmpxchg(p, old, new) +#define try_cmpxchg(p, _old, _new) \ +({ \ + typeof(*(_old)) _v = cmpxchg(p, *(_old), _new); \ + bool _ret = _v == *(_old); \ + *(_old) = _v; \ + _ret; \ +}) + +#define try_cmpxchg_acquire(p, _old, _new) \ + try_cmpxchg(p, _old, _new) + #define smp_mb__before_atomic() cmm_smp_mb__before_uatomic_add() #define smp_mb__after_atomic() cmm_smp_mb__after_uatomic_add() #define smp_wmb() cmm_smp_wmb() @@ -65,6 +76,11 @@ typedef struct { #define xchg(p, v) __atomic_exchange_n(p, v, __ATOMIC_SEQ_CST) #define xchg_acquire(p, v) __atomic_exchange_n(p, v, __ATOMIC_ACQUIRE) +#define try_cmpxchg(p, old, new) \ + __atomic_compare_exchange_n((p), __old, new, false, \ + __ATOMIC_SEQ_CST, \ + __ATOMIC_SEQ_CST) + #define cmpxchg(p, old, new) \ ({ \ typeof(*(p)) __old = (old); \ @@ -281,6 +297,11 @@ static inline i_type a_type##_cmpxchg(a_type##_t *v, i_type old, i_type new)\ return cmpxchg(&v->counter, old, new); \ } \ \ +static inline bool a_type##_try_cmpxchg(a_type##_t *v, i_type *old, i_type new)\ +{ \ + return try_cmpxchg(&v->counter, old, new); \ +} \ + \ static inline i_type a_type##_cmpxchg_acquire(a_type##_t *v, i_type old, i_type new)\ { \ return cmpxchg_acquire(&v->counter, old, new); \ |