summaryrefslogtreecommitdiff
path: root/arch/tile/lib/spinlock_32.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/tile/lib/spinlock_32.c')
-rw-r--r--arch/tile/lib/spinlock_32.c23
1 files changed, 0 insertions, 23 deletions
diff --git a/arch/tile/lib/spinlock_32.c b/arch/tile/lib/spinlock_32.c
index 076c6cc43113..db9333f2447c 100644
--- a/arch/tile/lib/spinlock_32.c
+++ b/arch/tile/lib/spinlock_32.c
@@ -62,29 +62,6 @@ int arch_spin_trylock(arch_spinlock_t *lock)
}
EXPORT_SYMBOL(arch_spin_trylock);
-void arch_spin_unlock_wait(arch_spinlock_t *lock)
-{
- u32 iterations = 0;
- int curr = READ_ONCE(lock->current_ticket);
- int next = READ_ONCE(lock->next_ticket);
-
- /* Return immediately if unlocked. */
- if (next == curr)
- return;
-
- /* Wait until the current locker has released the lock. */
- do {
- delay_backoff(iterations++);
- } while (READ_ONCE(lock->current_ticket) == curr);
-
- /*
- * The TILE architecture doesn't do read speculation; therefore
- * a control dependency guarantees a LOAD->{LOAD,STORE} order.
- */
- barrier();
-}
-EXPORT_SYMBOL(arch_spin_unlock_wait);
-
/*
* The low byte is always reserved to be the marker for a "tns" operation
* since the low bit is set to "1" by a tns. The next seven bits are