diff options
| -rw-r--r-- | arch/s390/lib/spinlock.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/arch/s390/lib/spinlock.c b/arch/s390/lib/spinlock.c index 3ca9de4d9cb..3f0e682b7e6 100644 --- a/arch/s390/lib/spinlock.c +++ b/arch/s390/lib/spinlock.c @@ -26,19 +26,20 @@ __setup("spin_retry=", spin_retry_setup); void arch_spin_lock_wait(arch_spinlock_t *lp) { - int count = spin_retry; unsigned int cpu = SPINLOCK_LOCKVAL; unsigned int owner; + int count; while (1) { owner = lp->lock; if (!owner || smp_vcpu_scheduled(~owner)) { - for (count = spin_retry; count > 0; count--) { + count = spin_retry; + do { if (arch_spin_is_locked(lp)) continue; if (_raw_compare_and_swap(&lp->lock, 0, cpu)) return; - } + } while (count-- > 0); if (MACHINE_IS_LPAR) continue; } @@ -53,22 +54,23 @@ EXPORT_SYMBOL(arch_spin_lock_wait); void arch_spin_lock_wait_flags(arch_spinlock_t *lp, unsigned long flags) { - int count = spin_retry; unsigned int cpu = SPINLOCK_LOCKVAL; unsigned int owner; + int count; local_irq_restore(flags); while (1) { owner = lp->lock; if (!owner || smp_vcpu_scheduled(~owner)) { - for (count = spin_retry; count > 0; count--) { + count = spin_retry; + do { if (arch_spin_is_locked(lp)) continue; local_irq_disable(); if (_raw_compare_and_swap(&lp->lock, 0, cpu)) return; local_irq_restore(flags); - } + } while (count-- > 0); if (MACHINE_IS_LPAR) continue; } |