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Commit 1d3aa6f6 authored by Mike Snitzer's avatar Mike Snitzer
Browse files

dm: remove dummy definition of 'struct dm_table' 



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: default avatarMike Snitzer <snitzer@redhat.com>
parent 115485e8

drivers/md/dm.c

+3 −11
Original line number Diff line number Diff line
@@ -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);