RAC_ENABLED
do_flush = test_bit(RAC_ENABLED, &b15_rac_flags); \
clear_bit(RAC_ENABLED, &b15_rac_flags);
__clear_bit(RAC_ENABLED, &b15_rac_flags);
__set_bit(RAC_ENABLED, &b15_rac_flags);
set_bit(RAC_ENABLED, &b15_rac_flags);