DROP_WRITES
if (test_and_set_bit(DROP_WRITES, &fc->flags)) {
} else if (test_bit(DROP_WRITES, &fc->flags)) {
if (test_bit(DROP_WRITES, &fc->flags) &&
!test_bit(DROP_WRITES, &fc->flags) && !test_bit(ERROR_WRITES, &fc->flags) &&
if (test_bit(DROP_WRITES, &fc->flags)) {
drop_writes = test_bit(DROP_WRITES, &fc->flags);