Clarify comment about integer division by a variable
@@ -2005,9 +2005,10 @@ static int ssl_decrypt_buf( mbedtls_ssl_context *ssl )
* correctly. We round down instead of up, so -56 is the correct
* value for our calculations instead of -55.
*
- * Repeat the formula rather than defining a block_size variable
- * so that the code only uses division by a constant, not division
- * by a variable.
+ * Repeat the formula rather than defining a block_size variable.
+ * This avoids requiring division by a variable at runtime
+ * (which would be marginally less efficient and would require
+ * linking an extra division function in some builds).
*/
size_t j, extra_run = 0;
switch( ssl->transform_in->ciphersuite_info->mac )
