diff options
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/include/asm/rwsem.h | 19 | ||||
| -rw-r--r-- | arch/s390/include/asm/spinlock.h | 25 | ||||
| -rw-r--r-- | arch/s390/lib/spinlock.c | 16 |
3 files changed, 32 insertions, 28 deletions
diff --git a/arch/s390/include/asm/rwsem.h b/arch/s390/include/asm/rwsem.h index f731b7b518bd..3f4198793b79 100644 --- a/arch/s390/include/asm/rwsem.h +++ b/arch/s390/include/asm/rwsem.h @@ -50,7 +50,7 @@ /* * lock for reading */ -static inline void __down_read(struct rw_semaphore *sem) +static inline int ___down_read(struct rw_semaphore *sem) { signed long old, new; @@ -63,10 +63,25 @@ static inline void __down_read(struct rw_semaphore *sem) : "=&d" (old), "=&d" (new), "=Q" (sem->count) : "Q" (sem->count), "i" (RWSEM_ACTIVE_READ_BIAS) : "cc", "memory"); - if (old < 0) + return (old < 0); +} + +static inline void __down_read(struct rw_semaphore *sem) +{ + if (___down_read(sem)) rwsem_down_read_failed(sem); } +static inline int __down_read_killable(struct rw_semaphore *sem) +{ + if (___down_read(sem)) { + if (IS_ERR(rwsem_down_read_failed_killable(sem))) + return -EINTR; + } + + return 0; +} + /* * trylock for reading -- returns 1 if successful, 0 if contention */ diff --git a/arch/s390/include/asm/spinlock.h b/arch/s390/include/asm/spinlock.h index f3f5e0155b10..d97175e16d9b 100644 --- a/arch/s390/include/asm/spinlock.h +++ b/arch/s390/include/asm/spinlock.h @@ -46,6 +46,7 @@ static inline void arch_spin_relax(arch_spinlock_t *lock) { arch_lock_relax(lock->lock); } +#define arch_spin_relax arch_spin_relax static inline u32 arch_spin_lockval(int cpu) { @@ -81,6 +82,7 @@ static inline void arch_spin_lock_flags(arch_spinlock_t *lp, if (!arch_spin_trylock_once(lp)) arch_spin_lock_wait_flags(lp, flags); } +#define arch_spin_lock_flags arch_spin_lock_flags static inline int arch_spin_trylock(arch_spinlock_t *lp) { @@ -111,34 +113,19 @@ static inline void arch_spin_unlock(arch_spinlock_t *lp) * read-locks. */ -/** - * read_can_lock - would read_trylock() succeed? - * @lock: the rwlock in question. - */ -#define arch_read_can_lock(x) ((int)(x)->lock >= 0) - -/** - * write_can_lock - would write_trylock() succeed? - * @lock: the rwlock in question. - */ -#define arch_write_can_lock(x) ((x)->lock == 0) - extern int _raw_read_trylock_retry(arch_rwlock_t *lp); extern int _raw_write_trylock_retry(arch_rwlock_t *lp); -#define arch_read_lock_flags(lock, flags) arch_read_lock(lock) -#define arch_write_lock_flags(lock, flags) arch_write_lock(lock) - static inline int arch_read_trylock_once(arch_rwlock_t *rw) { - int old = ACCESS_ONCE(rw->lock); + int old = READ_ONCE(rw->lock); return likely(old >= 0 && __atomic_cmpxchg_bool(&rw->lock, old, old + 1)); } static inline int arch_write_trylock_once(arch_rwlock_t *rw) { - int old = ACCESS_ONCE(rw->lock); + int old = READ_ONCE(rw->lock); return likely(old == 0 && __atomic_cmpxchg_bool(&rw->lock, 0, 0x80000000)); } @@ -225,7 +212,7 @@ static inline void arch_read_unlock(arch_rwlock_t *rw) int old; do { - old = ACCESS_ONCE(rw->lock); + old = READ_ONCE(rw->lock); } while (!__atomic_cmpxchg_bool(&rw->lock, old, old - 1)); } @@ -269,10 +256,12 @@ static inline void arch_read_relax(arch_rwlock_t *rw) { arch_lock_relax(rw->owner); } +#define arch_read_relax arch_read_relax static inline void arch_write_relax(arch_rwlock_t *rw) { arch_lock_relax(rw->owner); } +#define arch_write_relax arch_write_relax #endif /* __ASM_SPINLOCK_H */ diff --git a/arch/s390/lib/spinlock.c b/arch/s390/lib/spinlock.c index 1dc85f552f48..2d0af8667695 100644 --- a/arch/s390/lib/spinlock.c +++ b/arch/s390/lib/spinlock.c @@ -163,8 +163,8 @@ void _raw_read_lock_wait(arch_rwlock_t *rw) smp_yield_cpu(~owner); count = spin_retry; } - old = ACCESS_ONCE(rw->lock); - owner = ACCESS_ONCE(rw->owner); + old = READ_ONCE(rw->lock); + owner = READ_ONCE(rw->owner); if (old < 0) continue; if (__atomic_cmpxchg_bool(&rw->lock, old, old + 1)) @@ -179,7 +179,7 @@ int _raw_read_trylock_retry(arch_rwlock_t *rw) int old; while (count-- > 0) { - old = ACCESS_ONCE(rw->lock); + old = READ_ONCE(rw->lock); if (old < 0) continue; if (__atomic_cmpxchg_bool(&rw->lock, old, old + 1)) @@ -203,8 +203,8 @@ void _raw_write_lock_wait(arch_rwlock_t *rw, int prev) smp_yield_cpu(~owner); count = spin_retry; } - old = ACCESS_ONCE(rw->lock); - owner = ACCESS_ONCE(rw->owner); + old = READ_ONCE(rw->lock); + owner = READ_ONCE(rw->owner); smp_mb(); if (old >= 0) { prev = __RAW_LOCK(&rw->lock, 0x80000000, __RAW_OP_OR); @@ -231,8 +231,8 @@ void _raw_write_lock_wait(arch_rwlock_t *rw) smp_yield_cpu(~owner); count = spin_retry; } - old = ACCESS_ONCE(rw->lock); - owner = ACCESS_ONCE(rw->owner); + old = READ_ONCE(rw->lock); + owner = READ_ONCE(rw->owner); if (old >= 0 && __atomic_cmpxchg_bool(&rw->lock, old, old | 0x80000000)) prev = old; @@ -252,7 +252,7 @@ int _raw_write_trylock_retry(arch_rwlock_t *rw) int old; while (count-- > 0) { - old = ACCESS_ONCE(rw->lock); + old = READ_ONCE(rw->lock); if (old) continue; if (__atomic_cmpxchg_bool(&rw->lock, 0, 0x80000000)) |