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[S390] Remove owner_pc member from raw_spinlock_t.

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Used to contain the address of the holder of the lock. But since the
spinlock code is not inlined anymore all locks contain the same address
anyway. And since in addtition nobody complained about that for ages
its obviously unused. So remove it.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens
2008-01-26 14:11:03 +01:00
committed by Martin Schwidefsky
parent 9f4b0ba81f
commit 3b4beb3175
3 changed files with 10 additions and 22 deletions
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12
arch/s390/lib/spinlock.c
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@@ -39,7 +39,7 @@ static inline void _raw_yield_cpu(int cpu)
_raw_yield();
}
void _raw_spin_lock_wait(raw_spinlock_t *lp, unsigned int pc)
void _raw_spin_lock_wait(raw_spinlock_t *lp)
{
int count = spin_retry;
unsigned int cpu = ~smp_processor_id();
@@ -53,15 +53,13 @@ void _raw_spin_lock_wait(raw_spinlock_t *lp, unsigned int pc)
}
if (__raw_spin_is_locked(lp))
continue;
if (_raw_compare_and_swap(&lp->owner_cpu, 0, cpu) == 0) {
lp->owner_pc = pc;
if (_raw_compare_and_swap(&lp->owner_cpu, 0, cpu) == 0)
return;
}
}
}
EXPORT_SYMBOL(_raw_spin_lock_wait);
int _raw_spin_trylock_retry(raw_spinlock_t *lp, unsigned int pc)
int _raw_spin_trylock_retry(raw_spinlock_t *lp)
{
unsigned int cpu = ~smp_processor_id();
int count;
@@ -69,10 +67,8 @@ int _raw_spin_trylock_retry(raw_spinlock_t *lp, unsigned int pc)
for (count = spin_retry; count > 0; count--) {
if (__raw_spin_is_locked(lp))
continue;
if (_raw_compare_and_swap(&lp->owner_cpu, 0, cpu) == 0) {
lp->owner_pc = pc;
if (_raw_compare_and_swap(&lp->owner_cpu, 0, cpu) == 0)
return 1;
}
}
return 0;
}