[U-Boot] How to thread a patch sequence?

[Prafulla Wadaskar]

Hi

I have posted a patch http://lists.denx.de/pipermail/u-boot/2009-June/054797.html
I didn't received email confirmation for the same. (generally I get)
Now I need to send v2 patch for the same.

I want to thread my new patch with this earlier patch for better understanding of everyone on this mailing list.
Generally I was using message id of received email for this purpose.

Since for above patch I didn't received an email
How do I get information to put in "--in-reply-to" field?

Regards..
Prafulla . .