OpenZFS 7235 - remove unused func dsl_dataset_set_blkptr

Authored by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Alex Reece <alex@delphix.com>
Reviewed by: Prakash Surya <prakash.surya@delphix.com>
Reviewed by: Igor Kozhukhov <ikozhukhov@gmail.com>
Approved by: Robert Mustacchi <rm@joyent.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Ported-by: George Melikov <mail@gmelikov.ru>

OpenZFS-issue: https://www.illumos.org/issues/7235
OpenZFS-commit: openzfs/openzfs@bd56f80
Closes #5604

include/sys/dsl_dataset.h

@@ -271,7 +271,6 @@ int dsl_dataset_snapshot_tmp(const char *fsname, const char *snapname,
     minor_t cleanup_minor, const char *htag);
 
 blkptr_t *dsl_dataset_get_blkptr(dsl_dataset_t *ds);
-void dsl_dataset_set_blkptr(dsl_dataset_t *ds, blkptr_t *bp, dmu_tx_t *tx);
 
 spa_t *dsl_dataset_get_spa(dsl_dataset_t *ds);
 

module/zfs/dsl_dataset.c

@@ -1026,19 +1026,6 @@ dsl_dataset_get_blkptr(dsl_dataset_t *ds)
 	return (&dsl_dataset_phys(ds)->ds_bp);
 }
 
-void
-dsl_dataset_set_blkptr(dsl_dataset_t *ds, blkptr_t *bp, dmu_tx_t *tx)
-{
-	ASSERT(dmu_tx_is_syncing(tx));
-	/* If it's the meta-objset, set dp_meta_rootbp */
-	if (ds == NULL) {
-		tx->tx_pool->dp_meta_rootbp = *bp;
-	} else {
-		dmu_buf_will_dirty(ds->ds_dbuf, tx);
-		dsl_dataset_phys(ds)->ds_bp = *bp;
-	}
-}
-
 spa_t *
 dsl_dataset_get_spa(dsl_dataset_t *ds)
 {
@@ -3634,7 +3621,6 @@ EXPORT_SYMBOL(dsl_dataset_user_hold);
 EXPORT_SYMBOL(dsl_dataset_user_release);
 EXPORT_SYMBOL(dsl_dataset_get_holds);
 EXPORT_SYMBOL(dsl_dataset_get_blkptr);
-EXPORT_SYMBOL(dsl_dataset_set_blkptr);
 EXPORT_SYMBOL(dsl_dataset_get_spa);
 EXPORT_SYMBOL(dsl_dataset_modified_since_snap);
 EXPORT_SYMBOL(dsl_dataset_space_written);