4045 zfs write throttle & i/o scheduler performance work
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Adam Leventhal <ahl@delphix.com>
Reviewed by: Christopher Siden <christopher.siden@delphix.com>

@@ -218,10 +218,11 @@
 } dmu_object_type_t;
 
 typedef enum txg_how {
         TXG_WAIT = 1,
         TXG_NOWAIT,
+        TXG_WAITED,
 } txg_how_t;
 
 void byteswap_uint64_array(void *buf, size_t size);
 void byteswap_uint32_array(void *buf, size_t size);
 void byteswap_uint16_array(void *buf, size_t size);