Hi, A couple scsi drivers will use a atomic_t for some host/device state. They will do: atomic_set(&hba->state, SOME_STATE_VALUE); in a interrupt or thread or tasklet then in another thread they will do if (atomic_read(&hba->state) == SOME_STATE_VALUE)) In the Documentation/atomic_ops.txt it says: atomic_read does not guarantee that the runtime initialization by any other thread is visible yet, so the user of the interface must take care of that with a proper implicit or explicit memory barrier. Does this mean that the drivers should be doing a atomic_set(&hba->state, SOME_STATE_VALUE); smp_mb(); -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
