No, but there are a few things to note with Kerberos:

- If you have service accounts other than local system (and possibly network service) the SPNs will have to be registered against those accounts

- SPNs will have to be setup for both SQL and SSRS if you want Windows Integrated Security to work for SSRS

- The SSRS service account will need to be able to delegate Kerberos authentication to the SQL service running under the SQL Server service account

This white paper goes step-by-step how to go through setting it up:

Configuring Kerberos Authentication in a Reporting Services Environment