Hi Herbert, is it allowed that cipher implementations sleep? The driver of my question is whether I can use spin_lock_irqsave() as a lock around a cipher operation. The cipher operations in question are hashing, HMACing and symmetric ciphers. Thank you Stephan -- To unsubscribe from this list: send the line "unsubscribe linux-crypto" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html