State explicitly that any API depending on PSA is unstable
diff --git a/include/mbedtls/config.h b/include/mbedtls/config.h
index 1017a90..9751d26 100644
--- a/include/mbedtls/config.h
+++ b/include/mbedtls/config.h
@@ -1592,6 +1592,10 @@
* not covered yet, but parts that are not ported to PSA yet will still work
* as usual, so enabling this option should not break backwards compatibility.
*
+ * \warning Support for PSA is still an experimental feature.
+ * Any public API that depends on this option may change
+ * at any time until this warning is removed.
+ *
* Requires: MBEDTLS_PSA_CRYPTO_C.
*/
//#define MBEDTLS_USE_PSA_CRYPTO