Use abd_zero_off() where applicable
In several places abd_zero() cleaned ABD filled at the next line. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Alexander Motin <mav@FreeBSD.org> Sponsored by: iXsystems, Inc. Closes #15514
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@ -55,8 +55,8 @@ vdev_label_write_pad2(vdev_t *vd, const char *buf, size_t size)
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ASSERT3U(spa_config_held(spa, SCL_ALL, RW_WRITER), ==, SCL_ALL);
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pad2 = abd_alloc_for_io(VDEV_PAD_SIZE, B_TRUE);
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abd_zero(pad2, VDEV_PAD_SIZE);
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abd_copy_from_buf(pad2, buf, size);
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abd_zero_off(pad2, size, VDEV_PAD_SIZE - size);
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retry:
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zio = zio_root(spa, NULL, NULL, flags);
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@ -517,8 +517,9 @@ mmp_write_uberblock(spa_t *spa)
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zio_t *zio = zio_null(mmp->mmp_zio_root, spa, NULL, NULL, NULL, flags);
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abd_t *ub_abd = abd_alloc_for_io(VDEV_UBERBLOCK_SIZE(vd), B_TRUE);
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abd_zero(ub_abd, VDEV_UBERBLOCK_SIZE(vd));
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abd_copy_from_buf(ub_abd, ub, sizeof (uberblock_t));
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abd_zero_off(ub_abd, sizeof (uberblock_t),
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VDEV_UBERBLOCK_SIZE(vd) - sizeof (uberblock_t));
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mmp->mmp_seq++;
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mmp->mmp_kstat_id++;
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@ -1187,8 +1187,9 @@ vdev_label_init(vdev_t *vd, uint64_t crtxg, vdev_labeltype_t reason)
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* Initialize uberblock template.
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*/
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ub_abd = abd_alloc_linear(VDEV_UBERBLOCK_RING, B_TRUE);
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abd_zero(ub_abd, VDEV_UBERBLOCK_RING);
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abd_copy_from_buf(ub_abd, &spa->spa_uberblock, sizeof (uberblock_t));
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abd_zero_off(ub_abd, sizeof (uberblock_t),
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VDEV_UBERBLOCK_RING - sizeof (uberblock_t));
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ub = abd_to_buf(ub_abd);
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ub->ub_txg = 0;
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@ -1767,8 +1768,9 @@ vdev_uberblock_sync(zio_t *zio, uint64_t *good_writes,
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/* Copy the uberblock_t into the ABD */
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abd_t *ub_abd = abd_alloc_for_io(VDEV_UBERBLOCK_SIZE(vd), B_TRUE);
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abd_zero(ub_abd, VDEV_UBERBLOCK_SIZE(vd));
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abd_copy_from_buf(ub_abd, ub, sizeof (uberblock_t));
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abd_zero_off(ub_abd, sizeof (uberblock_t),
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VDEV_UBERBLOCK_SIZE(vd) - sizeof (uberblock_t));
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for (int l = 0; l < VDEV_LABELS; l++)
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vdev_label_write(zio, vd, l, ub_abd,
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