summaryrefslogtreecommitdiff
path: root/arch/s390/include/asm/spinlock.h
diff options
context:
space:
mode:
Diffstat (limited to 'arch/s390/include/asm/spinlock.h')
-rw-r--r--arch/s390/include/asm/spinlock.h19
1 files changed, 16 insertions, 3 deletions
diff --git a/arch/s390/include/asm/spinlock.h b/arch/s390/include/asm/spinlock.h
index f3861b09ebb0..c9af0d19c7ab 100644
--- a/arch/s390/include/asm/spinlock.h
+++ b/arch/s390/include/asm/spinlock.h
@@ -122,8 +122,10 @@ static inline void __raw_spin_unlock(raw_spinlock_t *lp)
#define __raw_write_can_lock(x) ((x)->lock == 0)
extern void _raw_read_lock_wait(raw_rwlock_t *lp);
+extern void _raw_read_lock_wait_flags(raw_rwlock_t *lp, unsigned long flags);
extern int _raw_read_trylock_retry(raw_rwlock_t *lp);
extern void _raw_write_lock_wait(raw_rwlock_t *lp);
+extern void _raw_write_lock_wait_flags(raw_rwlock_t *lp, unsigned long flags);
extern int _raw_write_trylock_retry(raw_rwlock_t *lp);
static inline void __raw_read_lock(raw_rwlock_t *rw)
@@ -134,6 +136,14 @@ static inline void __raw_read_lock(raw_rwlock_t *rw)
_raw_read_lock_wait(rw);
}
+static inline void __raw_read_lock_flags(raw_rwlock_t *rw, unsigned long flags)
+{
+ unsigned int old;
+ old = rw->lock & 0x7fffffffU;
+ if (_raw_compare_and_swap(&rw->lock, old, old + 1) != old)
+ _raw_read_lock_wait_flags(rw, flags);
+}
+
static inline void __raw_read_unlock(raw_rwlock_t *rw)
{
unsigned int old, cmp;
@@ -151,6 +161,12 @@ static inline void __raw_write_lock(raw_rwlock_t *rw)
_raw_write_lock_wait(rw);
}
+static inline void __raw_write_lock_flags(raw_rwlock_t *rw, unsigned long flags)
+{
+ if (unlikely(_raw_compare_and_swap(&rw->lock, 0, 0x80000000) != 0))
+ _raw_write_lock_wait_flags(rw, flags);
+}
+
static inline void __raw_write_unlock(raw_rwlock_t *rw)
{
_raw_compare_and_swap(&rw->lock, 0x80000000, 0);
@@ -172,9 +188,6 @@ static inline int __raw_write_trylock(raw_rwlock_t *rw)
return _raw_write_trylock_retry(rw);
}
-#define __raw_read_lock_flags(lock, flags) __raw_read_lock(lock)
-#define __raw_write_lock_flags(lock, flags) __raw_write_lock(lock)
-
#define _raw_read_relax(lock) cpu_relax()
#define _raw_write_relax(lock) cpu_relax()