diff --git a/module/zfs/dsl_scan.c b/module/zfs/dsl_scan.c
index 0756f57f37..6f095dad8e 100644
--- a/module/zfs/dsl_scan.c
+++ b/module/zfs/dsl_scan.c
@@ -1645,9 +1645,9 @@ dsl_scan_scrub_cb(dsl_pool_t *dp,
 	size_t size = BP_GET_PSIZE(bp);
 	spa_t *spa = dp->dp_spa;
 	uint64_t phys_birth = BP_PHYSICAL_BIRTH(bp);
-	boolean_t needs_io;
+	boolean_t needs_io = B_FALSE;
 	int zio_flags = ZIO_FLAG_SCRUB_THREAD | ZIO_FLAG_RAW | ZIO_FLAG_CANFAIL;
-	int zio_priority;
+	int zio_priority = 0;
 	int d;
 
 	if (phys_birth <= scn->scn_phys.scn_min_txg ||
diff --git a/module/zfs/vdev.c b/module/zfs/vdev.c
index e4c1a7707f..1262052256 100644
--- a/module/zfs/vdev.c
+++ b/module/zfs/vdev.c
@@ -1465,10 +1465,9 @@ vdev_hold(vdev_t *vd)
 void
 vdev_rele(vdev_t *vd)
 {
-	spa_t *spa = vd->vdev_spa;
 	int c;
 
-	ASSERT(spa_is_root(spa));
+	ASSERT(spa_is_root(vd->vdev_spa));
 	for (c = 0; c < vd->vdev_children; c++)
 		vdev_rele(vd->vdev_child[c]);
 
@@ -3074,10 +3073,10 @@ vdev_is_bootable(vdev_t *vd)
 void
 vdev_load_log_state(vdev_t *nvd, vdev_t *ovd)
 {
-	spa_t *spa = nvd->vdev_spa;
 	int c;
 
-	ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL);
+	ASSERT3S(spa_config_held(nvd->vdev_spa, SCL_STATE_ALL, RW_WRITER), ==,
+		 SCL_STATE_ALL);
 	ASSERT3U(nvd->vdev_guid, ==, ovd->vdev_guid);
 
 	for (c = 0; c < nvd->vdev_children; c++)