1 files changed, 16 insertions, 10 deletions

diff --git a/usr/src/uts/common/fs/zfs/zap.c b/usr/src/uts/common/fs/zfs/zap.c
index 26bb8d4b09..43d07ca741 100644
--- a/usr/src/uts/common/fs/zfs/zap.c
+++ b/usr/src/uts/common/fs/zfs/zap.c
@@ -1317,8 +1317,8 @@ fzap_get_stats(zap_t *zap, zap_stats_t *zs)
 }
 
 int
-fzap_count_write(zap_name_t *zn, int add, uint64_t *towrite,
-    uint64_t *tooverwrite)
+fzap_count_write(zap_name_t *zn, int add, refcount_t *towrite,
+    refcount_t *tooverwrite)
 {
 	zap_t *zap = zn->zn_zap;
 	zap_leaf_t *l;
@@ -1328,9 +1328,11 @@ fzap_count_write(zap_name_t *zn, int add, uint64_t *towrite,
 	 * Account for the header block of the fatzap.
 	 */
 	if (!add && dmu_buf_freeable(zap->zap_dbuf)) {
-		*tooverwrite += zap->zap_dbuf->db_size;
+		(void) refcount_add_many(tooverwrite,
+		    zap->zap_dbuf->db_size, FTAG);
 	} else {
-		*towrite += zap->zap_dbuf->db_size;
+		(void) refcount_add_many(towrite,
+		    zap->zap_dbuf->db_size, FTAG);
 	}
 
 	/*
@@ -1342,10 +1344,13 @@ fzap_count_write(zap_name_t *zn, int add, uint64_t *towrite,
 	 *   could extend the table.
 	 */
 	if (add) {
-		if (zap_f_phys(zap)->zap_ptrtbl.zt_blk == 0)
-			*towrite += zap->zap_dbuf->db_size;
-		else
-			*towrite += (zap->zap_dbuf->db_size * 3);
+		if (zap_f_phys(zap)->zap_ptrtbl.zt_blk == 0) {
+			(void) refcount_add_many(towrite,
+			    zap->zap_dbuf->db_size, FTAG);
+		} else {
+			(void) refcount_add_many(towrite,
+			    zap->zap_dbuf->db_size * 3, FTAG);
+		}
 	}
 
 	/*
@@ -1358,13 +1363,14 @@ fzap_count_write(zap_name_t *zn, int add, uint64_t *towrite,
 	}
 
 	if (!add && dmu_buf_freeable(l->l_dbuf)) {
-		*tooverwrite += l->l_dbuf->db_size;
+		(void) refcount_add_many(tooverwrite, l->l_dbuf->db_size, FTAG);
 	} else {
 		/*
 		 * If this an add operation, the leaf block could split.
 		 * Hence, we need to account for an additional leaf block.
 		 */
-		*towrite += (add ? 2 : 1) * l->l_dbuf->db_size;
+		(void) refcount_add_many(towrite,
+		    (add ? 2 : 1) * l->l_dbuf->db_size, FTAG);
 	}
 
 	zap_put_leaf(l);