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path: root/drivers/md/dm-table.c
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Diffstat (limited to 'drivers/md/dm-table.c')
-rw-r--r--drivers/md/dm-table.c35
1 files changed, 0 insertions, 35 deletions
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index 1ff252a..f221812 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -26,22 +26,8 @@
#define KEYS_PER_NODE (NODE_SIZE / sizeof(sector_t))
#define CHILDREN_PER_NODE (KEYS_PER_NODE + 1)
-/*
- * The table has always exactly one reference from either mapped_device->map
- * or hash_cell->new_map. This reference is not counted in table->holders.
- * A pair of dm_create_table/dm_destroy_table functions is used for table
- * creation/destruction.
- *
- * Temporary references from the other code increase table->holders. A pair
- * of dm_table_get/dm_table_put functions is used to manipulate it.
- *
- * When the table is about to be destroyed, we wait for table->holders to
- * drop to zero.
- */
-
struct dm_table {
struct mapped_device *md;
- atomic_t holders;
unsigned type;
/* btree table */
@@ -208,7 +194,6 @@ int dm_table_create(struct dm_table **result, fmode_t mode,
INIT_LIST_HEAD(&t->devices);
INIT_LIST_HEAD(&t->target_callbacks);
- atomic_set(&t->holders, 0);
if (!num_targets)
num_targets = KEYS_PER_NODE;
@@ -246,10 +231,6 @@ void dm_table_destroy(struct dm_table *t)
if (!t)
return;
- while (atomic_read(&t->holders))
- msleep(1);
- smp_mb();
-
/* free the indexes */
if (t->depth >= 2)
vfree(t->index[t->depth - 2]);
@@ -274,22 +255,6 @@ void dm_table_destroy(struct dm_table *t)
kfree(t);
}
-void dm_table_get(struct dm_table *t)
-{
- atomic_inc(&t->holders);
-}
-EXPORT_SYMBOL(dm_table_get);
-
-void dm_table_put(struct dm_table *t)
-{
- if (!t)
- return;
-
- smp_mb__before_atomic_dec();
- atomic_dec(&t->holders);
-}
-EXPORT_SYMBOL(dm_table_put);
-
/*
* Checks to see if we need to extend highs or targets.
*/