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dm: remove dummy definition of 'struct dm_table'

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Change the map pointer in 'struct mapped_device' from 'struct dm_table
__rcu *' to 'void __rcu *' to avoid the need for the dummy definition.

Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Mike Snitzer 2016-02-22 14:14:24 -05:00
parent 115485e83f
commit 1d3aa6f683
1 changed files with 3 additions and 11 deletions
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14
drivers/md/dm.c
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@ -120,14 +120,6 @@ struct dm_rq_clone_bio_info {
#define DMF_DEFERRED_REMOVE 6
#define DMF_SUSPENDED_INTERNALLY 7
/*
* A dummy definition to make RCU happy.
* struct dm_table should never be dereferenced in this file.
*/
struct dm_table {
int undefined__;
};
/*
* Work processed by per-device workqueue.
*/
@ -138,11 +130,11 @@ struct mapped_device {
atomic_t open_count;
/*
* The current mapping.
* The current mapping (struct dm_table *).
* Use dm_get_live_table{_fast} or take suspend_lock for
* dereference.
*/
struct dm_table __rcu *map;
void __rcu *map;
struct list_head table_devices;
struct mutex table_devices_lock;
@ -2562,7 +2554,7 @@ static struct dm_table *__bind(struct mapped_device *md, struct dm_table *t,
__bind_mempools(md, t);
old_map = rcu_dereference_protected(md->map, lockdep_is_held(&md->suspend_lock));
rcu_assign_pointer(md->map, t);
rcu_assign_pointer(md->map, (void *)t);
md->immutable_target_type = dm_table_get_immutable_target_type(t);
dm_table_set_restrictions(t, q, limits);