blk_crypto_keyslot_index
&blk_crypto_keyslots[blk_crypto_keyslot_index(slot)];
EXPORT_SYMBOL_GPL(blk_crypto_keyslot_index);
slot_idx = blk_crypto_keyslot_index(slot);
blk_crypto_keyslot_index(slot));
mrq->crypto_key_slot = blk_crypto_keyslot_index(keyslot);
lrbp->crypto_key_slot = blk_crypto_keyslot_index(rq->crypt_keyslot);
unsigned int blk_crypto_keyslot_index(struct blk_crypto_keyslot *slot);