diff options
Diffstat (limited to 'drivers/md/dm-table.c')
| -rw-r--r-- | drivers/md/dm-table.c | 35 |
1 files changed, 0 insertions, 35 deletions
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c index 1ff252ab7d46..f221812b7dbc 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. */ |