AFS_VOLUME_WAIT
set_bit(AFS_VOLUME_WAIT, &op->volume->flags);
if (test_bit(AFS_VOLUME_WAIT, &volume->flags))
clear_bit_unlock(AFS_VOLUME_WAIT, &volume->flags);
wake_up_bit(&volume->flags, AFS_VOLUME_WAIT);
if (!test_bit(AFS_VOLUME_WAIT, &volume->flags)) {
ret = wait_on_bit(&volume->flags, AFS_VOLUME_WAIT,