Revert psa_reserve_free_key_slot changes, lock in start_key_creation instead
This means we can hold the mutex around the call to reserve_free_key_slot
in get_and_lock_key_slot, avoiding inefficient rework.
(Changes to get_and_lock_key_slot are not in scope in this PR)
Signed-off-by: Ryan Everett <ryan.everett@arm.com>
diff --git a/library/psa_crypto_slot_management.h b/library/psa_crypto_slot_management.h
index 18a9144..585de13 100644
--- a/library/psa_crypto_slot_management.h
+++ b/library/psa_crypto_slot_management.h
@@ -107,6 +107,9 @@
* It is the responsibility of the caller to change the slot's state to
* PSA_SLOT_EMPTY/FULL once key creation has finished.
*
+ * If multi-threading is enabled, the caller must hold the
+ * global key slot mutex.
+ *
* \param[out] volatile_key_id On success, volatile key identifier
* associated to the returned slot.
* \param[out] p_slot On success, a pointer to the slot.