diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_geom.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_geom.c
index 85b31f001f6d..3df15e29778b 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_geom.c
+++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_geom.c
@@ -314,7 +314,7 @@ vdev_geom_io(struct g_consumer *cp, int cmd, void *data, off_t offset, off_t siz
 	error = 0;
 
 	for (; off < offset; off += maxio, p += maxio, size -= maxio) {
-		bzero(bp, sizeof(*bp));
+		g_reset_bio(bp);
 		bp->bio_cmd = cmd;
 		bp->bio_done = NULL;
 		bp->bio_offset = off;
diff --git a/sys/dev/mmc/mmcsd.c b/sys/dev/mmc/mmcsd.c
index 4ca0c2492797..77491234ca85 100644
--- a/sys/dev/mmc/mmcsd.c
+++ b/sys/dev/mmc/mmcsd.c
@@ -65,6 +65,7 @@ __FBSDID("$FreeBSD$");
 #include <sys/module.h>
 #include <sys/mutex.h>
 #include <sys/time.h>
+#include <geom/geom.h>
 #include <geom/geom_disk.h>
 
 #include <dev/mmc/mmcbrvar.h>
@@ -487,7 +488,7 @@ mmcsd_dump(void *arg, void *virtual, vm_offset_t physical,
 	if (!length)
 		return (0);
 
-	bzero(&bp, sizeof(struct bio));
+	g_reset_bio(&bp);
 	bp.bio_disk = disk;
 	bp.bio_pblkno = offset / disk->d_sectorsize;
 	bp.bio_bcount = length;
diff --git a/sys/dev/virtio/block/virtio_blk.c b/sys/dev/virtio/block/virtio_blk.c
index 0cfebf1d724c..7b273641a5dd 100644
--- a/sys/dev/virtio/block/virtio_blk.c
+++ b/sys/dev/virtio/block/virtio_blk.c
@@ -41,6 +41,7 @@ __FBSDID("$FreeBSD$");
 #include <sys/mutex.h>
 #include <sys/queue.h>
 
+#include <geom/geom.h>
 #include <geom/geom_disk.h>
 
 #include <machine/bus.h>
@@ -1146,7 +1147,7 @@ vtblk_ident(struct vtblk_softc *sc)
 	req->vbr_hdr.sector = 0;
 
 	req->vbr_bp = &buf;
-	bzero(&buf, sizeof(struct bio));
+	g_reset_bio(&buf);
 
 	buf.bio_cmd = BIO_READ;
 	buf.bio_data = dp->d_ident;
@@ -1278,7 +1279,7 @@ vtblk_dump_write(struct vtblk_softc *sc, void *virtual, off_t offset,
 	req->vbr_hdr.sector = offset / 512;
 
 	req->vbr_bp = &buf;
-	bzero(&buf, sizeof(struct bio));
+	g_reset_bio(&buf);
 
 	buf.bio_cmd = BIO_WRITE;
 	buf.bio_data = virtual;
@@ -1300,7 +1301,7 @@ vtblk_dump_flush(struct vtblk_softc *sc)
 	req->vbr_hdr.sector = 0;
 
 	req->vbr_bp = &buf;
-	bzero(&buf, sizeof(struct bio));
+	g_reset_bio(&buf);
 
 	buf.bio_cmd = BIO_FLUSH;
 
diff --git a/sys/geom/geom.h b/sys/geom/geom.h
index f313d02b74c8..bf70d0bc3155 100644
--- a/sys/geom/geom.h
+++ b/sys/geom/geom.h
@@ -324,6 +324,7 @@ void g_unregister_classifier(struct g_classifier_hook *hook);
 void g_io_request(struct bio *bp, struct g_consumer *cp);
 struct bio *g_new_bio(void);
 struct bio *g_alloc_bio(void);
+void g_reset_bio(struct bio *);
 void * g_read_data(struct g_consumer *cp, off_t offset, off_t length, int *error);
 int g_write_data(struct g_consumer *cp, off_t offset, void *ptr, off_t length);
 int g_delete_data(struct g_consumer *cp, off_t offset, off_t length);
diff --git a/sys/geom/geom_io.c b/sys/geom/geom_io.c
index 9dff151c6dad..5a2e4bd98e12 100644
--- a/sys/geom/geom_io.c
+++ b/sys/geom/geom_io.c
@@ -264,6 +264,13 @@ g_duplicate_bio(struct bio *bp)
 	return(bp2);
 }
 
+void
+g_reset_bio(struct bio *bp)
+{
+
+	bzero(bp, sizeof(bp));
+}
+
 void
 g_io_init()
 {
diff --git a/sys/geom/journal/g_journal.c b/sys/geom/journal/g_journal.c
index f0eb10347769..f0b07b2406a6 100644
--- a/sys/geom/journal/g_journal.c
+++ b/sys/geom/journal/g_journal.c
@@ -1296,7 +1296,7 @@ g_journal_flush(struct g_journal_softc *sc)
 		data = bp->bio_data;
 		if (sc->sc_flags & GJF_DEVICE_CHECKSUM)
 			MD5Update(&ctx, data, ent->je_length);
-		bzero(bp, sizeof(*bp));
+		g_reset_bio(bp);
 		bp->bio_cflags = GJ_BIO_JOURNAL;
 		bp->bio_offset = ent->je_offset;
 		bp->bio_joffset = ent->je_joffset;
@@ -1772,7 +1772,7 @@ g_journal_sync_read(struct g_consumer *cp, struct bio *bp, off_t offset,
 {
 	int error;
 
-	bzero(bp, sizeof(*bp));
+	g_reset_bio(bp);
 	bp->bio_cmd = BIO_READ;
 	bp->bio_done = NULL;
 	bp->bio_offset = offset;
diff --git a/sys/geom/mirror/g_mirror.c b/sys/geom/mirror/g_mirror.c
index cb2e41b26f42..70f5eb115fe3 100644
--- a/sys/geom/mirror/g_mirror.c
+++ b/sys/geom/mirror/g_mirror.c
@@ -1372,7 +1372,7 @@ g_mirror_sync_request(struct bio *bp)
 
 		/* Send next synchronization request. */
 		data = bp->bio_data;
-		bzero(bp, sizeof(*bp));
+		g_reset_bio(bp);
 		bp->bio_cmd = BIO_READ;
 		bp->bio_offset = sync->ds_offset;
 		bp->bio_length = MIN(MAXPHYS, sc->sc_mediasize - bp->bio_offset);
diff --git a/sys/geom/raid/g_raid.c b/sys/geom/raid/g_raid.c
index 839a2d46345c..4885319ab094 100644
--- a/sys/geom/raid/g_raid.c
+++ b/sys/geom/raid/g_raid.c
@@ -1011,7 +1011,7 @@ g_raid_tr_kerneldump_common(struct g_raid_tr_object *tr,
 	vol = tr->tro_volume;
 	sc = vol->v_softc;
 
-	bzero(&bp, sizeof(bp));
+	g_reset_bio(&bp);
 	bp.bio_cmd = BIO_WRITE;
 	bp.bio_done = g_raid_tr_kerneldump_common_done;
 	bp.bio_attribute = NULL;
diff --git a/sys/geom/raid3/g_raid3.c b/sys/geom/raid3/g_raid3.c
index 132ef84c05a1..584076f4536d 100644
--- a/sys/geom/raid3/g_raid3.c
+++ b/sys/geom/raid3/g_raid3.c
@@ -1717,7 +1717,7 @@ g_raid3_sync_request(struct bio *bp)
 
 		/* Send next synchronization request. */
 		data = bp->bio_data;
-		bzero(bp, sizeof(*bp));
+		g_reset_bio(bp);
 		bp->bio_cmd = BIO_READ;
 		bp->bio_offset = sync->ds_offset * (sc->sc_ndisks - 1);
 		bp->bio_length = MIN(MAXPHYS, sc->sc_mediasize - bp->bio_offset);
diff --git a/sys/kern/kern_physio.c b/sys/kern/kern_physio.c
index 5d75304a339c..a1483865fe5a 100644
--- a/sys/kern/kern_physio.c
+++ b/sys/kern/kern_physio.c
@@ -110,7 +110,7 @@ physio(struct cdev *dev, struct uio *uio, int ioflag)
 	error = 0;
 	for (i = 0; i < uio->uio_iovcnt; i++) {
 		while (uio->uio_iov[i].iov_len) {
-			bzero(bp, sizeof(*bp));
+			g_reset_bio(bp);
 			if (uio->uio_rw == UIO_READ) {
 				bp->bio_cmd = BIO_READ;
 				curthread->td_ru.ru_inblock++;