dm: eliminate some holes data structures

[safe/jmp/linux-2.6] / drivers / md / dm-linear.c

diff --git a/drivers/md/dm-linear.c b/drivers/md/dm-linear.c
index 44042be..9200dbf 100644 (file)
--- a/drivers/md/dm-linear.c
+++ b/drivers/md/dm-linear.c
@@ -47,12 +47,12 @@ static int linear_ctr(struct dm_target *ti, unsigned int argc, char **argv)
        }
        lc->start = tmp;
 
-       if (dm_get_device(ti, argv[0], lc->start, ti->len,
-                         dm_table_get_mode(ti->table), &lc->dev)) {
+       if (dm_get_device(ti, argv[0], dm_table_get_mode(ti->table), &lc->dev)) {
                ti->error = "dm-linear: Device lookup failed";
                goto bad;
        }
 
+       ti->num_flush_requests = 1;
        ti->private = lc;
        return 0;
 
@@ -81,7 +81,8 @@ static void linear_map_bio(struct dm_target *ti, struct bio *bio)
        struct linear_c *lc = ti->private;
 
        bio->bi_bdev = lc->dev->bdev;
-       bio->bi_sector = linear_map_sector(ti, bio->bi_sector);
+       if (bio_sectors(bio))
+               bio->bi_sector = linear_map_sector(ti, bio->bi_sector);
 }
 
 static int linear_map(struct dm_target *ti, struct bio *bio,
@@ -132,9 +133,17 @@ static int linear_merge(struct dm_target *ti, struct bvec_merge_data *bvm,
        return min(max_size, q->merge_bvec_fn(q, bvm, biovec));
 }
 
+static int linear_iterate_devices(struct dm_target *ti,
+                                 iterate_devices_callout_fn fn, void *data)
+{
+       struct linear_c *lc = ti->private;
+
+       return fn(ti, lc->dev, lc->start, ti->len, data);
+}
+
 static struct target_type linear_target = {
        .name   = "linear",
-       .version= {1, 0, 3},
+       .version = {1, 1, 0},
        .module = THIS_MODULE,
        .ctr    = linear_ctr,
        .dtr    = linear_dtr,
@@ -142,6 +151,7 @@ static struct target_type linear_target = {
        .status = linear_status,
        .ioctl  = linear_ioctl,
        .merge  = linear_merge,
+       .iterate_devices = linear_iterate_devices,
 };
 
 int __init dm_linear_init(void)
@@ -156,8 +166,5 @@ int __init dm_linear_init(void)
 
 void dm_linear_exit(void)
 {
-       int r = dm_unregister_target(&linear_target);
-
-       if (r < 0)
-               DMERR("unregister failed %d", r);
+       dm_unregister_target(&linear_target);
 }