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dm: use RCU_INIT_POINTER instead of rcu_assign_pointer in __unbind
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>
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@ -2163,7 +2163,7 @@ static struct dm_table *__unbind(struct mapped_device *md)
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return NULL;
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dm_table_event_callback(map, NULL, NULL);
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rcu_assign_pointer(md->map, NULL);
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RCU_INIT_POINTER(md->map, NULL);
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dm_sync_table(md);
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return map;
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