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dm: use RCU_INIT_POINTER instead of rcu_assign_pointer in __unbind

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Replace rcu_assign_pointer(p, NULL) with RCU_INIT_POINTER(p, NULL).

The rcu_assign_pointer() ensures that the initialization of a structure
is carried out before storing a pointer to that structure.  And in the
case of the NULL pointer, there is no structure to initialize.  So,
rcu_assign_pointer(p, NULL) can be safely converted to
RCU_INIT_POINTER(p, NULL).

Signed-off-by: Monam Agarwal <monamagarwal123@gmail.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Monam Agarwal 2014-03-23 23:58:27 +05:30 committed by Mike Snitzer
parent bfc6d41cee
commit 9cdb852004
1 changed files with 1 additions and 1 deletions
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2
drivers/md/dm.c
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@ -2163,7 +2163,7 @@ static struct dm_table *__unbind(struct mapped_device *md)
return NULL;
dm_table_event_callback(map, NULL, NULL);
rcu_assign_pointer(md->map, NULL);
RCU_INIT_POINTER(md->map, NULL);
dm_sync_table(md);
return map;