SPINLOCK_OWNER_INIT
.owner = SPINLOCK_OWNER_INIT, \
.owner = SPINLOCK_OWNER_INIT,
WRITE_ONCE(lock->owner, SPINLOCK_OWNER_INIT);
WRITE_ONCE(lock->owner, SPINLOCK_OWNER_INIT);
lock->owner = SPINLOCK_OWNER_INIT;
lock->owner = SPINLOCK_OWNER_INIT;
if (owner == SPINLOCK_OWNER_INIT)