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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2014-09-22 14:45:11 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2014-09-25 10:52:10 +0200
commit2684e73a861fe7b2ab763f442207025a1d9bb6a6 (patch)
tree36a5933a0a696425772f1a644f3223c88aca060f
parent6a5c1482e2b700e89f174ddb42434b37f15abccd (diff)
downloadblackbird-op-linux-2684e73a861fe7b2ab763f442207025a1d9bb6a6.tar.gz
blackbird-op-linux-2684e73a861fe7b2ab763f442207025a1d9bb6a6.zip
s390/rwlock: remove interrupt-enabling rwlock variant.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
-rw-r--r--arch/s390/include/asm/spinlock.h20
-rw-r--r--arch/s390/lib/spinlock.c50
2 files changed, 4 insertions, 66 deletions
diff --git a/arch/s390/include/asm/spinlock.h b/arch/s390/include/asm/spinlock.h
index e98654163e5c..f9537b91ff21 100644
--- a/arch/s390/include/asm/spinlock.h
+++ b/arch/s390/include/asm/spinlock.h
@@ -131,12 +131,13 @@ static inline void arch_spin_unlock_wait(arch_spinlock_t *lock)
#define arch_write_can_lock(x) ((x)->lock == 0)
extern void _raw_read_lock_wait(arch_rwlock_t *lp);
-extern void _raw_read_lock_wait_flags(arch_rwlock_t *lp, unsigned long flags);
-extern int _raw_read_trylock_retry(arch_rwlock_t *lp);
extern void _raw_write_lock_wait(arch_rwlock_t *lp);
-extern void _raw_write_lock_wait_flags(arch_rwlock_t *lp, unsigned long flags);
+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)
{
unsigned int old = ACCESS_ONCE(rw->lock);
@@ -157,12 +158,6 @@ static inline void arch_read_lock(arch_rwlock_t *rw)
_raw_read_lock_wait(rw);
}
-static inline void arch_read_lock_flags(arch_rwlock_t *rw, unsigned long flags)
-{
- if (!arch_read_trylock_once(rw))
- _raw_read_lock_wait_flags(rw, flags);
-}
-
static inline void arch_read_unlock(arch_rwlock_t *rw)
{
unsigned int old;
@@ -179,13 +174,6 @@ static inline void arch_write_lock(arch_rwlock_t *rw)
rw->owner = SPINLOCK_LOCKVAL;
}
-static inline void arch_write_lock_flags(arch_rwlock_t *rw, unsigned long flags)
-{
- if (!arch_write_trylock_once(rw))
- _raw_write_lock_wait_flags(rw, flags);
- rw->owner = SPINLOCK_LOCKVAL;
-}
-
static inline void arch_write_unlock(arch_rwlock_t *rw)
{
typecheck(unsigned int, rw->lock);
diff --git a/arch/s390/lib/spinlock.c b/arch/s390/lib/spinlock.c
index 5f63ac5783cb..c717f4a4c63e 100644
--- a/arch/s390/lib/spinlock.c
+++ b/arch/s390/lib/spinlock.c
@@ -131,31 +131,6 @@ void _raw_read_lock_wait(arch_rwlock_t *rw)
}
EXPORT_SYMBOL(_raw_read_lock_wait);
-void _raw_read_lock_wait_flags(arch_rwlock_t *rw, unsigned long flags)
-{
- unsigned int owner, old;
- int count = spin_retry;
-
- local_irq_restore(flags);
- owner = 0;
- while (1) {
- if (count-- <= 0) {
- if (owner && !smp_vcpu_scheduled(~owner))
- smp_yield_cpu(~owner);
- count = spin_retry;
- }
- old = ACCESS_ONCE(rw->lock);
- owner = ACCESS_ONCE(rw->owner);
- if ((int) old < 0)
- continue;
- local_irq_disable();
- if (_raw_compare_and_swap(&rw->lock, old, old + 1))
- return;
- local_irq_restore(flags);
- }
-}
-EXPORT_SYMBOL(_raw_read_lock_wait_flags);
-
int _raw_read_trylock_retry(arch_rwlock_t *rw)
{
unsigned int old;
@@ -194,31 +169,6 @@ void _raw_write_lock_wait(arch_rwlock_t *rw)
}
EXPORT_SYMBOL(_raw_write_lock_wait);
-void _raw_write_lock_wait_flags(arch_rwlock_t *rw, unsigned long flags)
-{
- unsigned int owner, old;
- int count = spin_retry;
-
- local_irq_restore(flags);
- owner = 0;
- while (1) {
- if (count-- <= 0) {
- if (owner && !smp_vcpu_scheduled(~owner))
- smp_yield_cpu(~owner);
- count = spin_retry;
- }
- old = ACCESS_ONCE(rw->lock);
- owner = ACCESS_ONCE(rw->owner);
- if (old)
- continue;
- local_irq_disable();
- if (_raw_compare_and_swap(&rw->lock, 0, 0x80000000))
- return;
- local_irq_restore(flags);
- }
-}
-EXPORT_SYMBOL(_raw_write_lock_wait_flags);
-
int _raw_write_trylock_retry(arch_rwlock_t *rw)
{
unsigned int old;
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