Commit 33423974 authored by Pranith Kumar's avatar Pranith Kumar Committed by Mike Snitzer

dm: Use rcu_dereference() for accessing rcu pointer

The map field in 'struct mapped_device' is an rcu pointer. Use rcu_dereference()
while accessing it.
Signed-off-by: default avatarPranith Kumar <bobby.prani@gmail.com>
Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: default avatarMike Snitzer <snitzer@redhat.com>
parent 42d6a8ce
......@@ -2332,7 +2332,7 @@ static struct dm_table *__bind(struct mapped_device *md, struct dm_table *t,
merge_is_optional = dm_table_merge_is_optional(t);
old_map = md->map;
old_map = rcu_dereference(md->map);
rcu_assign_pointer(md->map, t);
md->immutable_target_type = dm_table_get_immutable_target_type(t);
......@@ -2351,7 +2351,7 @@ static struct dm_table *__bind(struct mapped_device *md, struct dm_table *t,
*/
static struct dm_table *__unbind(struct mapped_device *md)
{
struct dm_table *map = md->map;
struct dm_table *map = rcu_dereference(md->map);
if (!map)
return NULL;
......@@ -2745,7 +2745,7 @@ int dm_suspend(struct mapped_device *md, unsigned suspend_flags)
goto out_unlock;
}
map = md->map;
map = rcu_dereference(md->map);
/*
* DMF_NOFLUSH_SUSPENDING must be set before presuspend.
......@@ -2839,7 +2839,7 @@ int dm_resume(struct mapped_device *md)
if (!dm_suspended_md(md))
goto out;
map = md->map;
map = rcu_dereference(md->map);
if (!map || !dm_table_get_size(map))
goto out;
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment