What kernel do I have?

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http://androidforums.com – I wanted to do some modifications using the STweaks app, such as the message notification light. However, after downloading the app it says 'sorry, no kernel support!'. Now when I rooted my phone I thought I had put the Siyah kernel on, but it appears I did not. Here are my current stats, can someone tell me what kernel it is? Details post root Baseband version – I9100XXMS2 Kernel version – 3.0.31-1069234 / dpi@DELL237 #3 /SMP PREEMPT Tue Mar 19 19:18:54 / KST 2013 Build Number – XWLSN NeatROM Lite v4.6 (General)