Fix unused variable

Accidentally introduced by 3dfb57a, when building with debugging
disabled several variables are unused.  Resolve this by wrapping
them in ASSERTV to remove them for non-debug builds.

Reviewed by: Don Brady <don.brady@intel.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #5284

diff --git a/module/zfs/zio.c b/module/zfs/zio.c
index 0147cb17c1aed8192de84bede23a80d832cadca9..e1fa543da6603249f1c319df8241ed3b0ffb0979 100644 (file)
--- a/module/zfs/zio.c
+++ b/module/zfs/zio.c
@@ -1064,7 +1064,7 @@ zio_vdev_child_io(zio_t *pio, blkptr_t *bp, vdev_t *vd, uint64_t offset,
         */
        if (flags & ZIO_FLAG_IO_ALLOCATING &&
            (vd != vd->vdev_top || (flags & ZIO_FLAG_IO_RETRY))) {
-               metaslab_class_t *mc = spa_normal_class(pio->io_spa);
+               ASSERTV(metaslab_class_t *mc = spa_normal_class(pio->io_spa));
 
                ASSERT(mc->mc_alloc_throttle_enabled);
                ASSERT(type == ZIO_TYPE_WRITE);
@@ -3555,10 +3555,10 @@ zio_ready(zio_t *zio)
 static void
 zio_dva_throttle_done(zio_t *zio)
 {
-       zio_t *lio = zio->io_logical;
        zio_t *pio = zio_unique_parent(zio);
        vdev_t *vd = zio->io_vd;
        int flags = METASLAB_ASYNC_ALLOC;
+       ASSERTV(zio_t *lio = zio->io_logical);
 
        ASSERT3P(zio->io_bp, !=, NULL);
        ASSERT3U(zio->io_type, ==, ZIO_TYPE_WRITE);