dsl_dataset_block_kill
(void) dsl_dataset_block_kill(ds, bp_orig, tx, B_TRUE);
(void) dsl_dataset_block_kill(ds, bp_orig, tx, B_TRUE);
bytesfreed += dsl_dataset_block_kill(ds, bp, tx, B_FALSE);
(void) dsl_dataset_block_kill(ka->ds, bp, tx, B_FALSE);
int dsl_dataset_block_kill(dsl_dataset_t *ds, const blkptr_t *bp,