FA_S_ACCESSED
if (!(fa_state & FA_S_ACCESSED))
WRITE_ONCE(fa->fa_state, fa_state | FA_S_ACCESSED);
new_fa->fa_state = state & ~FA_S_ACCESSED;
if (state & FA_S_ACCESSED)
if (READ_ONCE(fa_to_delete->fa_state) & FA_S_ACCESSED)