CRASHED_PRIMARY
uuid_flags |= test_bit(CRASHED_PRIMARY, &device->flags) ? 2 : 0;
set_bit(CRASHED_PRIMARY, &device->flags);
clear_bit(CRASHED_PRIMARY, &device->flags);
set_bit(CRASHED_PRIMARY, &device->flags);
(test_bit(CRASHED_PRIMARY, &device->flags) &&
rct = (test_bit(CRASHED_PRIMARY, &device->flags) ? 1 : 0) +
if (test_bit(CRASHED_PRIMARY, &device->flags))
clear_bit(CRASHED_PRIMARY, &device->flags);
|| test_bit(CRASHED_PRIMARY, &device->flags)); /* or only after Primary crash? */