[PATCH] dm: add exports

Move definitions of core device-mapper functions for manipulating mapped
devices and their tables to <linux/device-mapper.h> advertising their
availability for use elsewhere in the kernel.

Protect the contents of device-mapper.h with ifdef __KERNEL__.  And throw
in a few formatting clean-ups and extra comments.

Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 6 insertions, 6 deletions

diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 59bf797de9a5..952c49c3b9aa 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -50,9 +50,9 @@ struct target_io {
 
 union map_info *dm_get_mapinfo(struct bio *bio)
 {
-        if (bio && bio->bi_private)
-                return &((struct target_io *)bio->bi_private)->info;
-        return NULL;
+        if (bio && bio->bi_private)
+                return &((struct target_io *)bio->bi_private)->info;
+        return NULL;
 }
 
 #define MINOR_ALLOCED ((void *)-1)
@@ -474,8 +474,8 @@ static void __map_bio(struct dm_target *ti, struct bio *clone,
         if (r > 0) {
                 /* the bio has been remapped so dispatch it */
 
-                blk_add_trace_remap(bdev_get_queue(clone->bi_bdev), clone, 
-                                    tio->io->bio->bi_bdev->bd_dev, sector, 
+                blk_add_trace_remap(bdev_get_queue(clone->bi_bdev), clone,
+                                    tio->io->bio->bi_bdev->bd_dev, sector,
                                     clone->bi_sector);
 
                 generic_make_request(clone);
@@ -1042,7 +1042,7 @@ static struct mapped_device *dm_find_md(dev_t dev)
         md = idr_find(&_minor_idr, minor);
         if (md && (md == MINOR_ALLOCED ||
                    (dm_disk(md)->first_minor != minor) ||
-                   test_bit(DMF_FREEING, &md->flags))) {
+                   test_bit(DMF_FREEING, &md->flags))) {
                 md = NULL;
                 goto out;
         }